U. S. EPA ASM2525 & ASM5015 Start-Up Emission Standards
U.S. EPA ASM EMISSION STANDARDS - 1968-72 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 1118 (8.02) | 4990 | 1098 (9.90) | 4990 |
| 1875 | 1052 (7.56) | 4990 | 1034 (9.90) | 4990 |
| 2000 | 992 (7.14) | 4990 | 975 (9.90) | 4990 |
| 2125 | 938 (6.75) | 4990 | 921 (9.66) | 4990 |
| 2250 | 887 (6.40) | 4990 | 872 (9.14) | 4990 |
| 2375 | 841 (6.07) | 4990 | 827 (8.67) | 4990 |
| 2500 | 800 (5.78) | 4990 | 786 (8.25) | 4990 |
| 2625 | 761 (5.51) | 4990 | 748 (7.85) | 4990 |
| 2750 | 726 (5.26) | 4990 | 714 (7.50) | 4772 |
| 2875 | 695 (5.03) | 4892 | 683 (7.17) | 4556 |
| 3000 | 666 (4.83) | 4680 | 654 (6.87) | 4359 |
| 3125 | 639 (4.64) | 4488 | 628 (6.60) | 4180 |
| 3250 | 615 (4.47) | 4311 | 604 (6.35) | 4016 |
| 3375 | 593 (4.31) | 4150 | 583 (6.13) | 3866 |
| 3500 | 573 (4.17) | 4002 | 563 (5.92) | 3728 |
| 3625 | 554 (4.04) | 3867 | 544 (5.73) | 3602 |
| 3750 | 537 (3.91) | 3741 | 527 (5.55) | 3485 |
| 3875 | 521 (3.80) | 3625 | 512 (5.39) | 3377 |
| 4000 | 506 (3.70) | 3517 | 497 (5.24) | 3276 |
| 4125 | 492 (3.60) | 3416 | 484 (5.09) | 3182 |
| 4250 | 479 (3.51) | 3321 | 471 (4.96) | 3094 |
| 4375 | 467 (3.42) | 3230 | 459 (4.83) | 3010 |
| 4500 | 455 (3.34) | 3145 | 447 (4.71) | 2930 |
| 4625 | 444 (3.26) | 3063 | 436 (4.60) | 2854 |
| 4750 | 433 (3.18) | 2983 | 425 (4.49) | 2780 |
| 4875 | 423 (3.11) | 2907 | 415 (4.38) | 2709 |
| 5000 | 412 (3.03) | 2833 | 405 (4.28) | 2540 |
| 5125 | 402 (2.97) | 2760 | 395 (4.18) | 2573 |
| 5250 | 393 (2.90) | 2690 | 386 (4.08) | 2507 |
| 5375 | 383 (2.83) | 2621 | 376 (3.98) | 2443 |
| 5500 | 374 (2.77) | 2554 | 367 (3.89) | 2381 |
| 5625 | 365 (2.70) | 2489 | 359 (3.80) | 2321 |
| 5750 | 357 (2.64) | 2426 | 350 (3.71) | 2262 |
| 5875 | 348 (2.59) | 2366 | 342 (3.62) | 2206 |
| 6000 | 341 (2.53) | 2308 | 334 (3.54) | 2152 |
| 6125 | 333 (2.48) | 2254 | 327 (3.47) | 2102 |
| 6250 | 326 (2.43) | 2204 | 320 (3.40) | 2056 |
| 6375 | 320 (2.39) | 2159 | 314 (3.34) | 2014 |
| 6500 | 315 (2.35) | 2119 | 309 (3.28) | 1977 |
| 6625 | 310 (2.32) | 2087 | 304 (3.23) | 1947 |
| 6750 | 307 (2.29) | 2062 | 301 (3.20) | 1924 |
| 6875 | 305 (2.28) | 2046 | 299 (3.17) | 1909 |
| 7000 | 304 (2.27) | 2040 | 298 (3.17) | 1904 |
| 7125 Or More | 304 (2.27) | 2045 | 298 (3.17) | 1904 |
U.S. EPA ASM EMISSION STANDARDS - 1973-74 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 1118 (8.02) | 4990 | 1098 (9.90) | 4980 |
| 1875 | 1052 (7.56) | 4990 | 1034 (9.90) | 4906 |
| 2000 | 992 (7.14) | 4919 | 975 (9.90) | 4838 |
| 2125 | 938 (6.75) | 4853 | 921 (9.66) | 4776 |
| 2250 | 887 (6.40) | 4792 | 872 (9.14) | 4720 |
| 2375 | 841 (6.07) | 4736 | 827 (8.67) | 4668 |
| 2500 | 800 (5.78) | 4685 | 786 (8.25) | 4620 |
| 2625 | 761 (5.51) | 4639 | 748 (7.85) | 4577 |
| 2750 | 726 (5.26) | 4596 | 714 (7.50) | 4374 |
| 2875 | 695 (5.03) | 4484 | 683 (7.17) | 4176 |
| 3000 | 666 (4.83) | 4290 | 654 (6.87) | 3996 |
| 3125 | 639 (4.64) | 4114 | 628 (6.60) | 3832 |
| 3250 | 615 (4.47) | 3952 | 604 (6.35) | 3681 |
| 3375 | 593 (4.31) | 3804 | 583 (6.13) | 3544 |
| 3500 | 573 (4.17) | 3669 | 563 (5.92) | 3418 |
| 3625 | 554 (4.04) | 3544 | 544 (5.73) | 3302 |
| 3750 | 537 (3.91) | 3429 | 527 (5.55) | 3195 |
| 3875 | 521 (3.80) | 3323 | 512 (5.39) | 3096 |
| 4000 | 506 (3.70) | 3224 | 497 (5.24) | 3003 |
| 4125 | 492 (3.60) | 3131 | 484 (5.09) | 2917 |
| 4250 | 479 (3.51) | 3044 | 471 (4.96) | 2836 |
| 4375 | 467 (3.42) | 2961 | 459 (4.83) | 2759 |
| 4500 | 455 (3.34) | 2883 | 447 (4.71) | 2686 |
| 4625 | 444 (3.26) | 2807 | 436 (4.60) | 2616 |
| 4750 | 433 (3.18) | 2735 | 425 (4.49) | 2549 |
| 4875 | 423 (3.11) | 2665 | 415 (4.38) | 2483 |
| 5000 | 412 (3.03) | 2597 | 405 (4.28) | 2420 |
| 5125 | 402 (2.97) | 2530 | 395 (4.18) | 2359 |
| 5250 | 393 (2.90) | 2466 | 386 (4.08) | 2298 |
| 5375 | 383 (2.83) | 2403 | 376 (3.98) | 2240 |
| 5500 | 374 (2.77) | 2341 | 367 (3.89) | 2183 |
| 5625 | 365 (2.70) | 2282 | 359 (3.80) | 2127 |
| 5750 | 357 (2.64) | 2224 | 350 (3.71) | 2074 |
| 5875 | 348 (2.59) | 2168 | 342 (3.62) | 2022 |
| 6000 | 341 (2.53) | 2116 | 334 (3.54) | 1973 |
| 6125 | 333 (2.48) | 2066 | 327 (3.47) | 1927 |
| 6250 | 326 (2.43) | 2020 | 320 (3.40) | 1884 |
| 6375 | 320 (2.39) | 1979 | 314 (3.34) | 1846 |
| 6500 | 315 (2.35) | 1943 | 309 (3.28) | 1813 |
| 6625 | 310 (2.32) | 1913 | 304 (3.23) | 1785 |
| 6750 | 307 (2.29) | 1890 | 301 (3.20) | 1764 |
| 6875 | 305 (2.28) | 1875 | 299 (3.17) | 1750 |
| 7000 | 304 (2.27) | 1870 | 298 (3.17) | 1745 |
| 7125 Or More | 304 (2.27) | 1874 | 298 (3.17) | 1745 |
U.S. EPA ASM EMISSION STANDARDS - 1975-76 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 774 (3.92) | 4990 | 761 (5.45) | 4980 |
| 1875 | 729 (3.70) | 4990 | 717 (5.14) | 4906 |
| 2000 | 688 (3.49) | 4919 | 676 (4.85) | 4838 |
| 2125 | 650 (3.31) | 4853 | 638 (4.58) | 4776 |
| 2250 | 615 (3.13) | 4792 | 604 (4.34) | 4720 |
| 2375 | 583 (2.98) | 4736 | 573 (4.12) | 4668 |
| 2500 | 554 (2.83) | 4685 | 544 (3.91) | 4620 |
| 2625 | 528 (2.70) | 4639 | 518 (3.73) | 4577 |
| 2750 | 503 (2.58) | 4596 | 495 (3.56) | 4374 |
| 2875 | 481 (2.47) | 4484 | 473 (3.41) | 4176 |
| 3000 | 461 (2.37) | 4290 | 453 (3.27) | 3996 |
| 3125 | 443 (2.28) | 4114 | 435 (3.14) | 3832 |
| 3250 | 426 (2.20) | 3952 | 419 (3.02) | 3681 |
| 3375 | 411 (2.12) | 3804 | 404 (2.91) | 3544 |
| 3500 | 397 (2.05) | 3669 | 390 (2.82) | 3418 |
| 3625 | 384 (1.99) | 3544 | 377 (2.73) | 3302 |
| 3750 | 372 (1.93) | 3429 | 365 (2.64) | 3195 |
| 3875 | 361 (1.87) | 3323 | 355 (2.57) | 3096 |
| 4000 | 351 (1.82) | 3224 | 345 (2.49) | 3003 |
| 4125 | 341 (1.77) | 3131 | 335 (2.43) | 2917 |
| 4250 | 332 (1.73) | 3044 | 326 (2.36) | 2836 |
| 4375 | 323 (1.68) | 2961 | 318 (2.31) | 2759 |
| 4500 | 315 (1.64) | 2883 | 310 (2.25) | 2686 |
| 4625 | 308 (1.61) | 2807 | 302 (2.19) | 2616 |
| 4750 | 300 (1.57) | 2735 | 295 (2.14) | 2549 |
| 4875 | 293 (1.53) | 2665 | 288 (2.09) | 2483 |
| 5000 | 286 (1.50) | 2597 | 281 (2.04) | 2420 |
| 5125 | 279 (1.46) | 2530 | 274 (2.00) | 2359 |
| 5250 | 272 (1.43) | 2466 | 267 (1.95) | 2298 |
| 5375 | 266 (1.40) | 2403 | 261 (1.90) | 2240 |
| 5500 | 259 (1.37) | 2341 | 255 (1.86) | 2183 |
| 5625 | 253 (1.34) | 2282 | 248 (1.82) | 2127 |
| 5750 | 247 (1.31) | 2224 | 243 (1.78) | 2074 |
| 5875 | 241 (1.28) | 2168 | 237 (1.74) | 2022 |
| 6000 | 236 (1.25) | 2116 | 232 (1.70) | 1973 |
| 6125 | 231 (1.23) | 2066 | 227 (1.66) | 1927 |
| 6250 | 226 (1.20) | 2020 | 222 (1.63) | 1884 |
| 6375 | 222 (1.18) | 1979 | 218 (1.60) | 1846 |
| 6500 | 218 (1.16) | 1943 | 214 (1.57) | 1813 |
| 6625 | 215 (1.15) | 1913 | 211 (1.55) | 1785 |
| 6750 | 213 (1.14) | 1890 | 209 (1.54) | 1764 |
| 6875 | 211 (1.13) | 1875 | 207 (1.52) | 1750 |
| 7000 | 211 (1.12) | 1870 | 207 (1.52) | 1745 |
| 7125 Or More | 211 (1.12) | 1874 | 206 (1.52) | 1745 |
U.S. EPA ASM EMISSION STANDARDS - 1977-79 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 774 (3.92) | 4990 | 761 (5.45) | 4950 |
| 1875 | 729 (3.70) | 4990 | 717 (5.14) | 4655 |
| 2000 | 688 (3.49) | 4707 | 676 (4.85) | 4384 |
| 2125 | 650 (3.31) | 4441 | 638 (4.58) | 4136 |
| 2250 | 615 (3.13) | 4197 | 604 (4.34) | 3909 |
| 2375 | 583 (2.98) | 3974 | 573 (4.12) | 3701 |
| 2500 | 554 (2.83) | 3771 | 544 (3.91) | 3512 |
| 2625 | 528 (2.70) | 3585 | 518 (3.73) | 3339 |
| 2750 | 503 (2.58) | 3416 | 495 (3.56) | 3181 |
| 2875 | 481 (2.47) | 3261 | 473 (3.41) | 3037 |
| 3000 | 461 (2.37) | 3120 | 453 (3.27) | 2906 |
| 3125 | 443 (2.28) | 2992 | 435 (3.14) | 2787 |
| 3250 | 426 (2.20) | 2874 | 419 (3.02) | 2677 |
| 3375 | 411 (2.12) | 2767 | 404 (2.91) | 2577 |
| 3500 | 397 (2.05) | 2668 | 390 (2.82) | 2486 |
| 3625 | 384 (1.99) | 2578 | 377 (2.73) | 2401 |
| 3750 | 372 (1.93) | 2494 | 365 (2.64) | 2323 |
| 3875 | 361 (1.87) | 2417 | 355 (2.57) | 2251 |
| 4000 | 351 (1.82) | 2345 | 345 (2.49) | 2184 |
| 4125 | 341 (1.77) | 2277 | 335 (2.43) | 2122 |
| 4250 | 332 (1.73) | 2214 | 326 (2.36) | 2063 |
| 4375 | 323 (1.68) | 2154 | 318 (2.31) | 2007 |
| 4500 | 315 (1.64) | 2096 | 310 (2.25) | 1953 |
| 4625 | 308 (1.61) | 2042 | 302 (2.19) | 1903 |
| 4750 | 300 (1.57) | 1989 | 295 (2.14) | 1854 |
| 4875 | 293 (1.53) | 1938 | 288 (2.09) | 1806 |
| 5000 | 286 (1.50) | 1889 | 281 (2.04) | 1760 |
| 5125 | 279 (1.46) | 1840 | 274 (2.00) | 1715 |
| 5250 | 272 (1.43) | 1793 | 267 (1.95) | 1672 |
| 5375 | 266 (1.40) | 1747 | 261 (1.90) | 1629 |
| 5500 | 259 (1.37) | 1703 | 255 (1.86) | 1587 |
| 5625 | 253 (1.34) | 1659 | 248 (1.82) | 1547 |
| 5750 | 247 (1.31) | 1617 | 243 (1.78) | 1508 |
| 5875 | 241 (1.28) | 1577 | 237 (1.74) | 1471 |
| 6000 | 236 (1.25) | 1539 | 232 (1.70) | 1435 |
| 6125 | 231 (1.23) | 1503 | 227 (1.66) | 1401 |
| 6250 | 226 (1.20) | 1469 | 222 (1.63) | 1371 |
| 6375 | 222 (1.18) | 1439 | 218 (1.60) | 1343 |
| 6500 | 218 (1.16) | 1413 | 214 (1.57) | 1318 |
| 6625 | 215 (1.15) | 1391 | 211 (1.55) | 1298 |
| 6750 | 213 (1.14) | 1374 | 209 (1.54) | 1283 |
| 6875 | 211 (1.13) | 1364 | 207 (1.52) | 1273 |
| 7000 Or More | 211 (1.12) | 1360 | 207 (1.52) | 1269 |
U.S. EPA ASM EMISSION STANDARDS - 1980 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 291 (2.78) | 4990 | 282 (3.64) | 4950 |
| 1875 | 275 (2.63) | 4990 | 266 (3.43) | 4655 |
| 2000 | 260 (2.48) | 4707 | 252 (3.24) | 4384 |
| 2125 | 246 (2.35) | 4441 | 239 (3.06) | 4136 |
| 2250 | 234 (2.23) | 4197 | 227 (2.90) | 3909 |
| 2375 | 223 (2.12) | 3974 | 216 (2.76) | 3701 |
| 2500 | 212 (2.02) | 3771 | 206 (2.62) | 3512 |
| 2625 | 203 (1.92) | 3585 | 197 (2.50) | 3339 |
| 2750 | 194 (1.84) | 3416 | 189 (2.39) | 3181 |
| 2875 | 187 (1.76) | 3261 | 181 (2.29) | 3037 |
| 3000 | 180 (1.69) | 3120 | 174 (2.19) | 2906 |
| 3125 | 173 (1.63) | 2992 | 168 (2.11) | 2787 |
| 3250 | 167 (1.57) | 2874 | 162 (2.03) | 2677 |
| 3375 | 162 (1.52) | 2767 | 157 (1.96) | 2577 |
| 3500 | 157 (1.47) | 2668 | 152 (1.89) | 2486 |
| 3625 | 152 (1.42) | 2578 | 148 (1.84) | 2401 |
| 3750 | 148 (1.38) | 2492 | 144 (1.78) | 2323 |
| 3875 | 144 (1.34) | 2417 | 140 (1.73) | 2251 |
| 4000 | 140 (1.31) | 2345 | 137 (1.68) | 2184 |
| 4125 | 137 (1.27) | 2277 | 133 (1.64) | 2122 |
| 4250 | 134 (1.24) | 2214 | 130 (1.60) | 2063 |
| 4375 | 131 (1.21) | 2154 | 127 (1.56) | 2007 |
| 4500 | 128 (1.18) | 2096 | 124 (1.52) | 1953 |
| 4625 | 125 (1.15) | 2042 | 122 (1.48) | 1903 |
| 4750 | 122 (1.13) | 1989 | 119 (1.45) | 1854 |
| 4875 | 120 (1.10) | 1938 | 117 (1.42) | 1806 |
| 5000 | 117 (1.08) | 1889 | 114 (1.38) | 1760 |
| 5125 | 115 (1.05) | 1840 | 112 (1.35) | 1715 |
| 5250 | 112 (1.03) | 1793 | 110 (1.32) | 1672 |
| 5375 | 110 (1.01) | 1747 | 107 (1.29) | 1629 |
| 5500 | 108 (0.99) | 1703 | 105 (1.26) | 1587 |
| 5625 | 106 (0.97) | 1659 | 103 (1.24) | 1547 |
| 5750 | 104 (0.94) | 1617 | 101 (1.21) | 1508 |
| 5875 | 102 (0.92) | 1577 | 99 (1.18) | 1471 |
| 6000 | 100 (0.91) | 1539 | 97 (1.16) | 1435 |
| 6125 | 98 (0.89) | 1503 | 95 (1.13) | 1401 |
| 6250 | 96 (0.87) | 1469 | 94 (1.11) | 1371 |
| 6375 | 95 (0.86) | 1439 | 92 (1.09) | 1343 |
| 6500 | 93 (0.84) | 1413 | 91 (1.08) | 1318 |
| 6625 | 92 (0.83) | 1391 | 90 (1.06) | 1298 |
| 6750 | 91 (0.82) | 1374 | 89 (1.05) | 1283 |
| 6875 | 91 (0.82) | 1364 | 89 (1.04) | 1273 |
| 7000 | 91 (0.82) | 1360 | 88 (1.04) | 1269 |
| 7125 Or More | 90 (0.81) | 1360 | 88 (1.04) | 1269 |
U.S. EPA ASM EMISSION STANDARDS - 1981-82 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 291 (2.78) | 2272 | 282 (3.64) | 2114 |
| 1875 | 275 (2.63) | 2181 | 266 (3.43) | 1991 |
| 2000 | 260 (2.48) | 2058 | 252 (3.24) | 1877 |
| 2125 | 246 (2.35) | 1944 | 239 (3.06) | 1774 |
| 2250 | 234 (2.23) | 1839 | 227 (2.90) | 1678 |
| 2375 | 223 (2.12) | 1744 | 216 (2.76) | 1592 |
| 2500 | 212 (2.02) | 1657 | 206 (2.62) | 1512 |
| 2625 | 203 (1.92) | 1577 | 197 (2.50) | 1440 |
| 2750 | 194 (1.84) | 1504 | 189 (2.39) | 1374 |
| 2875 | 187 (1.76) | 1438 | 181 (2.29) | 1313 |
| 3000 | 180 (1.69) | 1378 | 174 (2.19) | 1258 |
| 3125 | 173 (1.63) | 1323 | 168 (2.11) | 1208 |
| 3250 | 167 (1.57) | 1273 | 162 (2.03) | 1163 |
| 3375 | 162 (1.52) | 1227 | 157 (1.96) | 1121 |
| 3500 | 157 (1.47) | 1184 | 152 (1.89) | 1082 |
| 3625 | 152 (1.42) | 1146 | 148 (1.84) | 1047 |
| 3750 | 148 (1.38) | 1110 | 144 (1.78) | 1014 |
| 3875 | 144 (1.34) | 1077 | 140 (1.73) | 984 |
| 4000 | 140 (1.31) | 1046 | 137 (1.68) | 956 |
| 4125 | 137 (1.27) | 1017 | 133 (1.64) | 930 |
| 4250 | 134 (1.24) | 990 | 130 (1.60) | 905 |
| 4375 | 131 (1.21) | 964 | 127 (1.56) | 882 |
| 4500 | 128 (1.18) | 939 | 124 (1.52) | 859 |
| 4625 | 125 (1.15) | 916 | 122 (1.48) | 838 |
| 4750 | 122 (1.13) | 893 | 119 (1.45) | 818 |
| 4875 | 120 (1.10) | 872 | 117 (1.42) | 798 |
| 5000 | 117 (1.08) | 850 | 114 (1.38) | 778 |
| 5125 | 115 (1.05) | 830 | 112 (1.35) | 760 |
| 5250 | 112 (1.03) | 810 | 110 (1.32) | 741 |
| 5375 | 110 (1.01) | 790 | 107 (1.29) | 723 |
| 5500 | 108 (0.99) | 771 | 105 (1.26) | 706 |
| 5625 | 106 (0.97) | 752 | 103 (1.24) | 689 |
| 5750 | 104 (0.94) | 734 | 101 (1.21) | 673 |
| 5875 | 102 (0.92) | 717 | 99 (1.18) | 657 |
| 6000 | 100 (0.91) | 701 | 97 (1.16) | 642 |
| 6125 | 98 (0.89) | 685 | 95 (1.13) | 628 |
| 6250 | 96 (0.87) | 671 | 94 (1.11) | 615 |
| 6375 | 95 (0.86) | 658 | 92 (1.09) | 604 |
| 6500 | 93 (0.84) | 647 | 91 (1.08) | 593 |
| 6625 | 92 (0.83) | 638 | 90 (1.06) | 585 |
| 6750 | 91 (0.82) | 631 | 89 (1.05) | 578 |
| 6875 | 91 (0.82) | 626 | 89 (1.04) | 574 |
| 7000 | 91 (0.82) | 624 | 88 (1.04) | 573 |
| 7125 Or More | 90 (0.81) | 625 | 88 (1.04) | 573 |
U.S. EPA ASM EMISSION STANDARDS - 1983-90 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 291 (1.64) | 2272 | 282 (1.83) | 2114 |
| 1875 | 275 (1.55) | 2181 | 266 (1.72) | 1991 |
| 2000 | 260 (1.47) | 2058 | 252 (1.63) | 1877 |
| 2125 | 246 (1.39) | 1944 | 239 (1.54) | 1774 |
| 2250 | 234 (1.31) | 1839 | 227 (1.47) | 1678 |
| 2375 | 223 (1.26) | 1744 | 216 (1.39) | 1592 |
| 2500 | 212 (1.20) | 1657 | 206 (1.33) | 1512 |
| 2625 | 203 (1.15) | 1577 | 197 (1.27) | 1440 |
| 2750 | 194 (1.10) | 1504 | 189 (1.21) | 1374 |
| 2875 | 187 (1.05) | 1438 | 181 (1.16) | 1313 |
| 3000 | 180 (1.01) | 1378 | 174 (1.12) | 1258 |
| 3125 | 173 (0.98) | 1323 | 168 (1.08) | 1208 |
| 3250 | 167 (0.94) | 1273 | 162 (1.04) | 1163 |
| 3375 | 162 (0.91) | 1227 | 157 (1.00) | 1121 |
| 3500 | 157 (0.88) | 1184 | 152 (0.97) | 1082 |
| 3625 | 152 (0.86) | 1146 | 148 (0.94) | 1047 |
| 3750 | 148 (0.83) | 1110 | 144 (0.92) | 1014 |
| 3875 | 144 (0.81) | 1077 | 140 (0.89) | 984 |
| 4000 | 140 (0.79) | 1046 | 137 (0.87) | 956 |
| 4125 | 137 (0.77) | 1017 | 133 (0.85) | 930 |
| 4250 | 134 (0.75) | 990 | 130 (.83) | 905 |
| 4375 | 131 (0.74) | 964 | 127 (0.81) | 882 |
| 4500 | 128 (0.72) | 939 | 124 (0.79) | 859 |
| 4625 | 125 (0.70) | 916 | 122 (0.77) | 838 |
| 4750 | 122 (0.69) | 893 | 119 (0.76) | 818 |
| 4875 | 120 (0.67) | 872 | 117 (0.74) | 798 |
| 5000 | 117 (0.66) | 850 | 114 (0.73) | 778 |
| 5125 | 115 (0.65) | 830 | 112 (0.71) | 760 |
| 5250 | 112 (0.63) | 810 | 110 (0.70) | 741 |
| 5375 | 110 (0.62) | 790 | 107 (0.68) | 723 |
| 5500 | 108 (0.61) | 771 | 105 (0.67) | 706 |
| 5625 | 106 (0.59) | 752 | 103 (0.65) | 689 |
| 5750 | 104 (0.58) | 734 | 101 (0.64) | 673 |
| 5875 | 102 (0.57) | 717 | 99 (0.63) | 657 |
| 6000 | 100 (0.56) | 701 | 97 (0.62) | 642 |
| 6125 | 98 (0.55) | 685 | 95 (0.61) | 628 |
| 6250 | 96 (0.54) | 671 | 94 (0.60) | 615 |
| 6375 | 95 (0.53) | 658 | 92 (0.59) | 604 |
| 6500 | 93 (0.52) | 647 | 91 (0.58) | 593 |
| 6625 | 92 (0.52) | 638 | 90 (0.57) | 585 |
| 6750 | 91 (0.51) | 631 | 89 (0.57) | 578 |
| 6875 | 91 (0.51) | 626 | 89 (0.56) | 574 |
| 7000 | 91 (0.51) | 624 | 88 (0.56) | 573 |
| 7125 | 90 (0.51) | 625 | 88 (0.56) | 573 |
| 7250 Or More | 90 (0.50) | 625 | 88 (0.56) | 573 |
U.S. EPA ASM EMISSION STANDARDS - 1991-95 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 224 (1.26) | 1819 | 216 (1.22) | 1642 |
| 1875 | 212 (1.19) | 1713 | 205 (1.16) | 1547 |
| 2000 | 201 (1.13) | 1616 | 194 (1.09) | 1460 |
| 2125 | 191 (1.07) | 1527 | 184 (1.04) | 1380 |
| 2250 | 182 (1.02) | 1446 | 175 (0.99) | 1307 |
| 2375 | 173 (0.97) | 1372 | 167 (0.94) | 1240 |
| 2500 | 166 (0.93) | 1304 | 160 (0.90) | 1179 |
| 2625 | 159 (0.89) | 1242 | 153 (0.86) | 1123 |
| 2750 | 152 (0.85) | 1186 | 147 (0.82) | 1072 |
| 2875 | 146 (0.82) | 1134 | 141 (0.79) | 1026 |
| 3000 | 141 (0.79) | 1088 | 136 (0.76) | 984 |
| 3125 | 136 (0.76) | 1045 | 132 (0.73) | 945 |
| 3250 | 132 (0.73) | 1006 | 127 (0.71) | 910 |
| 3375 | 128 (0.71) | 970 | 123 (0.69) | 878 |
| 3500 | 124 (0.69) | 937 | 120 (0.67) | 848 |
| 3625 | 120 (0.67) | 907 | 117 (0.65) | 821 |
| 3750 | 117 (0.65) | 879 | 114 (0.63) | 796 |
| 3875 | 114 (0.63) | 853 | 111 (0.61) | 773 |
| 4000 | 112 (0.62) | 829 | 108 (0.60) | 751 |
| 4125 | 109 (0.60) | 807 | 106 (0.58) | 731 |
| 4250 | 107 (0.59) | 786 | 103 (0.57) | 712 |
| 4375 | 104 (0.58) | 766 | 101 (0.56) | 694 |
| 4500 | 102 (0.57) | 747 | 99 (0.55) | 677 |
| 4625 | 100 (0.55) | 728 | 97 (0.54) | 661 |
| 4750 | 98 (0.54) | 711 | 95 (0.53) | 645 |
| 4875 | 96 (0.53) | 694 | 93 (0.52) | 630 |
| 5000 | 94 (0.52) | 677 | 92 (0.51) | 615 |
| 5125 | 93 (0.51) | 661 | 90 (0.50) | 600 |
| 5250 | 91 (0.50) | 646 | 88 (0.49) | 586 |
| 5375 | 89 (0.49) | 631 | 86 (0.48) | 573 |
| 5500 | 87 (0.48) | 616 | 85 (0.47) | 559 |
| 5625 | 86 (0.47) | 601 | 83 (0.46) | 546 |
| 5750 | 84 (0.46) | 587 | 82 (0.45) | 534 |
| 5875 | 83 (0.45) | 574 | 80 (0.44) | 522 |
| 6000 | 81 (0.44) | 561 | 79 (0.44) | 510 |
| 6125 | 80 (0.44) | 549 | 78 (0.43) | 499 |
| 6250 | 79 (0.43) | 538 | 76 (0.42) | 489 |
| 6375 | 77 (0.42) | 528 | 75 (0.42) | 480 |
| 6500 | 76 (0.42) | 519 | 74 (0.41) | 473 |
| 6625 | 76 (0.41) | 512 | 74 (0.41) | 466 |
| 6750 | 75 (0.41) | 507 | 73 (0.41) | 461 |
| 6875 | 75 (0.40) | 503 | 73 (0.40) | 458 |
| 7000 Or More | 74 (0.40) | 502 | 72 (0.40) | 457 |
U.S. EPA ASM EMISSION STANDARDS - 1994 & NEWER + TIER 1 LIGHT DUTY VEHICLES
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 142 (0.80) | 1212 | 136 (0.77) | 1095 |
| 1875 | 134 (0.75) | 1142 | 129 (0.73) | 1031 |
| 2000 | 127 (0.71) | 1077 | 123 (0.69) | 973 |
| 2125 | 121 (0.68) | 1018 | 116 (0.66) | 920 |
| 2250 | 115 (0.64) | 964 | 111 (0.62) | 871 |
| 2375 | 109 (0.61) | 915 | 106 (0.59) | 827 |
| 2500 | 105 (0.59) | 869 | 101 (0.57) | 786 |
| 2625 | 100 (0.56) | 828 | 97 (0.54) | 749 |
| 2750 | 96 (0.54) | 791 | 93 (0.52) | 715 |
| 2875 | 92 (0.52) | 756 | 89 (0.50) | 684 |
| 3000 | 89 (0.50) | 725 | 86 (0.48) | 656 |
| 3125 | 86 (0.48) | 696 | 83 (0.46) | 630 |
| 3250 | 83 (0.46) | 670 | 80 (0.45) | 607 |
| 3375 | 81 (0.45) | 647 | 78 (0.43) | 585 |
| 3500 | 78 (0.44) | 625 | 76 (0.42) | 566 |
| 3625 | 76 (0.42) | 605 | 74 (0.41) | 547 |
| 3750 | 74 (0.41) | 586 | 72 (0.40) | 531 |
| 3875 | 72 (0.40) | 569 | 70 (0.39) | 515 |
| 4000 | 71 (0.39) | 553 | 68 (0.38) | 501 |
| 4125 | 69 (0.38) | 538 | 67 (0.37) | 487 |
| 4250 | 67 (0.37) | 524 | 65 (0.36) | 475 |
| 4375 | 66 (0.36) | 510 | 64 (0.35) | 463 |
| 4500 | 65 (0.36) | 498 | 63 (0.35) | 440 |
| 4625 | 63 (0.35) | 486 | 61 (0.34) | 440 |
| 4750 | 62 (0.34) | 474 | 60 (0.33) | 430 |
| 4875 | 61 (0.34) | 463 | 59 (0.33) | 420 |
| 5000 | 60 (0.33) | 452 | 58 (0.32) | 410 |
| 5125 | 58 (0.32) | 441 | 57 (0.31) | 400 |
| 5250 | 57 (0.32) | 431 | 56 (0.31) | 391 |
| 5375 | 56 (0.31) | 420 | 55 (0.30) | 382 |
| 5500 | 55 (0.30) | 410 | 54 (0.30) | 373 |
| 5625 | 54 (0.30) | 401 | 53 (0.29) | 364 |
| 5750 | 53 (0.29) | 391 | 52 (0.29) | 356 |
| 5875 | 52 (0.29) | 383 | 51 (0.28) | 348 |
| 6000 | 51 (0.28) | 374 | 50 (0.28) | 340 |
| 6125 | 50 (0.28) | 366 | 49 (0.27) | 333 |
| 6250 | 50 (0.27) | 359 | 48 (0.27) | 326 |
| 6375 | 49 (0.27) | 352 | 48 (0.26) | 320 |
| 6500 | 48 (0.26) | 346 | 47 (0.26) | 315 |
| 6625 | 48 (0.26) | 341 | 46 (0.26) | 311 |
| 6750 | 47 (0.26) | 338 | 46 (0.26) | 307 |
| 6875 | 47 (0.26) | 335 | 46 (0.25) | 305 |
| 7000 Or More | 47 (0.25) | 335 | 46 (0.25) | 305 |
U.S. EPA ASM EMISSION STANDARDS - 1968-72 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 1118 (8.02) | 4990 | 1098 (9.90) | 4990 |
| 1875 | 1052 (7.56) | 4990 | 1034 (9.90) | 4990 |
| 2000 | 992 (7.14) | 4990 | 975 (9.90) | 4990 |
| 2125 | 938 (6.75) | 4990 | 921 (9.66) | 4990 |
| 2250 | 887 (6.40) | 4990 | 872 (9.14) | 4990 |
| 2375 | 841 (6.07) | 4990 | 827 (8.67) | 4990 |
| 2500 | 800 (5.78) | 4990 | 786 (8.25) | 4990 |
| 2625 | 761 (5.51) | 4990 | 748 (7.85) | 4990 |
| 2750 | 726 (5.26) | 4990 | 714 (7.50) | 4772 |
| 2875 | 695 (5.03) | 4892 | 683 (7.17) | 4556 |
| 3000 | 666 (4.83) | 4680 | 654 (6.87) | 4359 |
| 3125 | 639 (4.64) | 4488 | 628 (6.60) | 4180 |
| 3250 | 615 (4.47) | 4311 | 604 (6.35) | 4016 |
| 3375 | 593 (4.31) | 4150 | 583 (6.13) | 3866 |
| 3500 | 573 (4.17) | 4002 | 563 (5.92) | 3728 |
| 3625 | 554 (4.04) | 3867 | 544 (5.73) | 3602 |
| 3750 | 537 (3.91) | 3741 | 527 (5.55) | 3485 |
| 3875 | 521 (3.80) | 3625 | 512 (5.39) | 3377 |
| 4000 | 506 (3.70) | 3517 | 497 (5.24) | 3276 |
| 4125 | 492 (3.60) | 3416 | 484 (5.09) | 3182 |
| 4250 | 479 (3.51) | 3321 | 471 (4.96) | 3094 |
| 4375 | 467 (3.42) | 3230 | 459 (4.83) | 3010 |
| 4500 | 455 (3.34) | 3145 | 447 (4.71) | 2930 |
| 4625 | 444 (3.26) | 3063 | 436 (4.60) | 2854 |
| 4750 | 433 (3.18) | 2983 | 425 (4.49) | 2780 |
| 4875 | 423 (3.11) | 2907 | 415 (4.38) | 2709 |
| 5000 | 412 (3.03) | 2833 | 405 (4.28) | 2540 |
| 5125 | 402 (2.97) | 2760 | 395 (4.18) | 2573 |
| 5250 | 393 (2.90) | 2690 | 386 (4.08) | 2507 |
| 5375 | 383 (2.83) | 2621 | 376 (3.98) | 2443 |
| 5500 | 374 (2.77) | 2554 | 367 (3.89) | 2381 |
| 5625 | 365 (2.70) | 2489 | 359 (3.80) | 2321 |
| 5750 | 357 (2.64) | 2426 | 350 (3.71) | 2262 |
| 5875 | 348 (2.59) | 2366 | 342 (3.62) | 2206 |
| 6000 | 341 (2.53) | 2308 | 334 (3.54) | 2152 |
| 6125 | 333 (2.48) | 2254 | 327 (3.47) | 2102 |
| 6250 | 326 (2.43) | 2204 | 320 (3.40) | 2056 |
| 6375 | 320 (2.39) | 2159 | 314 (3.34) | 2014 |
| 6500 | 315 (2.35) | 2119 | 309 (3.28) | 1977 |
| 6625 | 310 (2.32) | 2087 | 304 (3.23) | 1947 |
| 6750 | 307 (2.29) | 2062 | 301 (3.20) | 1924 |
| 6875 | 305 (2.28) | 2046 | 299 (3.17) | 1909 |
| 7000 | 304 (2.27) | 2040 | 298 (3.17) | 1904 |
| 7125 Or More | 304 (2.27) | 2045 | 298 (3.17) | 1904 |
U.S. EPA ASM EMISSION STANDARDS - 1973-74 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 1118 (8.02) | 4990 | 1098 (9.90) | 4980 |
| 1875 | 1052 (7.56) | 4990 | 1034 (9.90) | 4906 |
| 2000 | 992 (7.14) | 4919 | 975 (9.90) | 4838 |
| 2125 | 938 (6.75) | 4853 | 921 (9.66) | 4776 |
| 2250 | 887 (6.40) | 4792 | 872 (9.14) | 4720 |
| 2375 | 841 (6.07) | 4736 | 827 (8.67) | 4668 |
| 2500 | 800 (5.78) | 4685 | 786 (8.25) | 4620 |
| 2625 | 761 (5.51) | 4639 | 748 (7.85) | 4577 |
| 2750 | 726 (5.26) | 4596 | 714 (7.50) | 4374 |
| 2875 | 695 (5.03) | 4484 | 683 (7.17) | 4176 |
| 3000 | 666 (4.83) | 4290 | 654 (6.87) | 3996 |
| 3125 | 639 (4.64) | 4114 | 628 (6.60) | 3832 |
| 3250 | 615 (4.47) | 3952 | 604 (6.35) | 3681 |
| 3375 | 593 (4.31) | 3804 | 583 (6.13) | 3544 |
| 3500 | 573 (4.17) | 3669 | 563 (5.92) | 3418 |
| 3625 | 554 (4.04) | 3544 | 544 (5.73) | 3302 |
| 3750 | 537 (3.91) | 3429 | 527 (5.55) | 3195 |
| 3875 | 521 (3.80) | 3323 | 512 (5.39) | 3096 |
| 4000 | 506 (3.70) | 3224 | 497 (5.24) | 3003 |
| 4125 | 492 (3.60) | 3131 | 484 (5.09) | 2917 |
| 4250 | 479 (3.51) | 3044 | 471 (4.96) | 2836 |
| 4375 | 467 (3.42) | 2961 | 459 (4.83) | 2759 |
| 4500 | 455 (3.34) | 2883 | 447 (4.71) | 2686 |
| 4625 | 444 (3.26) | 2807 | 436 (4.60) | 2616 |
| 4750 | 433 (3.18) | 2735 | 425 (4.49) | 2549 |
| 4875 | 423 (3.11) | 2665 | 415 (4.38) | 2483 |
| 5000 | 412 (3.03) | 2597 | 405 (4.28) | 2420 |
| 5125 | 402 (2.97) | 2530 | 395 (4.18) | 2359 |
| 5250 | 393 (2.90) | 2466 | 386 (4.08) | 2298 |
| 5375 | 383 (2.83) | 2403 | 376 (3.98) | 2240 |
| 5500 | 374 (2.77) | 2341 | 367 (3.89) | 2183 |
| 5625 | 365 (2.70) | 2282 | 359 (3.80) | 2127 |
| 5750 | 357 (2.64) | 2224 | 350 (3.71) | 2074 |
| 5875 | 348 (2.59) | 2168 | 342 (3.62) | 2022 |
| 6000 | 341 (2.53) | 2116 | 334 (3.54) | 1973 |
| 6125 | 333 (2.48) | 2066 | 327 (3.47) | 1927 |
| 6250 | 326 (2.43) | 2020 | 320 (3.40) | 1884 |
| 6375 | 320 (2.39) | 1979 | 314 (3.34) | 1846 |
| 6500 | 315 (2.35) | 1943 | 309 (3.28) | 1813 |
| 6625 | 310 (2.32) | 1913 | 304 (3.23) | 1785 |
| 6750 | 307 (2.29) | 1890 | 301 (3.20) | 1764 |
| 6875 | 305 (2.28) | 1875 | 299 (3.17) | 1750 |
| 7000 | 304 (2.27) | 1870 | 298 (3.17) | 1745 |
| 7125 Or More | 304 (2.27) | 1874 | 298 (3.17) | 1745 |
U.S. EPA ASM EMISSION STANDARDS - 1975-78 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 843 (5.07) | 4990 | 828 (7.26) | 4980 |
| 1875 | 794 (4.78) | 4990 | 780 (6.84) | 4906 |
| 2000 | 749 (4.51) | 4919 | 736 (6.45) | 4838 |
| 2125 | 707 (4.26) | 4853 | 695 (6.10) | 4776 |
| 2250 | 669 (4.04) | 4792 | 658 (5.78) | 4720 |
| 2375 | 635 (3.83) | 4736 | 624 (5.48) | 4668 |
| 2500 | 603 (3.65) | 4685 | 593 (5.21) | 4620 |
| 2625 | 574 (3.48) | 4639 | 564 (4.96) | 4577 |
| 2750 | 548 (3.32) | 4596 | 539 (4.73) | 4374 |
| 2875 | 524 (3.18) | 4484 | 515 (4.53) | 4176 |
| 3000 | 502 (3.05) | 4290 | 493 (4.34) | 3996 |
| 3125 | 482 (2.93) | 4114 | 474 (4.17) | 3832 |
| 3250 | 464 (2.82) | 3952 | 456 (4.01) | 3681 |
| 3375 | 447 (2.72) | 3804 | 440 (3.87) | 3544 |
| 3500 | 432 (2.63) | 3669 | 424 (3.74) | 3418 |
| 3625 | 418 (2.55) | 3544 | 411 (3.62) | 3302 |
| 3750 | 405 (2.47) | 3429 | 398 (3.51) | 3195 |
| 3875 | 393 (2.40) | 3323 | 386 (3.40) | 3096 |
| 4000 | 382 (2.33) | 3224 | 375 (3.31) | 3003 |
| 4125 | 371 (2.27) | 3131 | 365 (3.22) | 2917 |
| 4250 | 361 (2.21) | 3044 | 355 (3.13) | 2836 |
| 4375 | 352 (2.16) | 2961 | 346 (3.05) | 2759 |
| 4500 | 343 (2.11) | 2883 | 337 (2.98) | 2686 |
| 4625 | 335 (2.06) | 2807 | 329 (2.90) | 2616 |
| 4750 | 327 (2.01) | 2735 | 321 (2.83) | 2549 |
| 4875 | 319 (1.96) | 2665 | 313 (2.77) | 2483 |
| 5000 | 311 (1.92) | 2597 | 305 (2.70) | 2420 |
| 5125 | 304 (1.87) | 2530 | 298 (2.64) | 2359 |
| 5250 | 296 (1.83) | 2466 | 291 (2.58) | 2298 |
| 5375 | 289 (1.79) | 2403 | 284 (2.51) | 2240 |
| 5500 | 282 (1.75) | 2341 | 277 (2.46) | 2183 |
| 5625 | 276 (1.71) | 2282 | 271 (2.40) | 2127 |
| 5750 | 269 (1.67) | 2224 | 264 (2.34) | 2074 |
| 5875 | 263 (1.63) | 2168 | 258 (2.29) | 2022 |
| 6000 | 257 (1.60) | 2116 | 252 (2.24) | 1973 |
| 6125 | 251 (1.57) | 2066 | 247 (2.19) | 1927 |
| 6250 | 246 (1.54) | 2020 | 242 (2.15) | 1884 |
| 6375 | 242 (1.51) | 1979 | 237 (2.11) | 1846 |
| 6500 | 238 (1.48) | 1943 | 233 (2.07) | 1813 |
| 6625 | 234 (1.46) | 1913 | 230 (2.04) | 1785 |
| 6750 | 232 (1.45) | 1890 | 227 (2.02) | 1764 |
| 6875 | 230 (1.44) | 1875 | 225 (2.00) | 1750 |
| 7000 | 229 (1.43) | 1870 | 225 (2.00) | 1745 |
| 7125 Or More | 229 (1.43) | 1874 | 225 (2.00) | 1745 |
U.S. EPA ASM EMISSION STANDARDS - 1979-83 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 774 (4.31) | 4990 | 761 (6.06) | 4960 |
| 1875 | 729 (4.06) | 4990 | 717 (5.70) | 4738 |
| 2000 | 688 (3.83) | 4778 | 676 (5.38) | 4535 |
| 2125 | 650 (3.63) | 4578 | 638 (5.09) | 4349 |
| 2250 | 615 (3.44) | 4395 | 604 (4.82) | 4179 |
| 2375 | 583 (3.26) | 4228 | 573 (4.57) | 4024 |
| 2500 | 554 (3.10) | 4076 | 544 (4.35) | 3881 |
| 2625 | 528 (2.96) | 3936 | 518 (4.14) | 3752 |
| 2750 | 503 (2.83) | 3809 | 495 (3.95) | 3579 |
| 2875 | 481 (2.71) | 3669 | 473 (3.78) | 3417 |
| 3000 | 461 (2.60) | 3510 | 453 (3.62) | 3270 |
| 3125 | 443 (2.50) | 3366 | 435 (3.48) | 3135 |
| 3250 | 426 (2.40) | 3234 | 419 (3.35) | 3012 |
| 3375 | 411 (2.32) | 3113 | 404 (3.23) | 2899 |
| 3500 | 397 (2.24) | 3002 | 390 (3.12) | 2796 |
| 3625 | 384 (2.17) | 2900 | 377 (3.02) | 2701 |
| 3750 | 372 (2.11) | 2806 | 365 (2.93) | 2614 |
| 3875 | 361 (2.05) | 2719 | 355 (2.58) | 2533 |
| 4000 | 351 (1.99) | 2638 | 345 (2.77) | 2457 |
| 4125 | 341 (1.94) | 2562 | 335 (2.69) | 2387 |
| 4250 | 332 (1.89) | 2490 | 326 (2.62) | 2320 |
| 4375 | 323 (1.84) | 2423 | 318 (2.55) | 2258 |
| 4500 | 315 (1.80) | 2359 | 310 (2.49) | 2198 |
| 4625 | 308 (1.76) | 2297 | 302 (2.43) | 2140 |
| 4750 | 300 (1.72) | 2238 | 295 (2.37) | 2085 |
| 4875 | 293 (1.68) | 2180 | 288 (2.32) | 2032 |
| 5000 | 286 (1.64) | 2125 | 281 (2.26) | 1980 |
| 5125 | 279 (1.60) | 2070 | 274 (2.21) | 1930 |
| 5250 | 272 (1.56) | 2017 | 267 (2.16) | 1881 |
| 5375 | 26 (1.53) | 1966 | 261 (2.11) | 1833 |
| 5500 | 259 (1.49) | 1916 | 255 (2.06) | 1786 |
| 5625 | 253 (1.46) | 1867 | 248 (2.01) | 1740 |
| 5750 | 247 (1.43) | 1820 | 243 (1.96) | 1697 |
| 5875 | 241 (1.40) | 1774 | 237 (1.92) | 1654 |
| 6000 | 236 (1.37) | 1731 | 232 (1.88) | 1614 |
| 6125 | 231 (1.34) | 1690 | 227 (1.84) | 1577 |
| 6250 | 226 (1.31) | 1653 | 222 (1.80) | 1542 |
| 6375 | 222 (1.29) | 1619 | 218 (1.77) | 1510 |
| 6500 | 218 (1.27) | 1590 | 214 (1.74) | 1483 |
| 6625 | 215 (1.25) | 1565 | 211 (1.72) | 1460 |
| 6750 | 213 (1.24) | 1546 | 209 (1.70) | 1443 |
| 6875 | 211 (1.23) | 1534 | 207 (1.68) | 1432 |
| 7000 | 211 (1.23) | 1530 | 207 (1.68) | 1428 |
| 7125 Or More | 211 (1.22) | 1531 | 206 (1.68) | 1428 |
U.S. EPA ASM EMISSION STANDARDS - 1984-87 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 390 (3.54) | 4990 | 381 (4.85) | 4960 |
| 1875 | 368 (3.34) | 4990 | 359 (4.57) | 4738 |
| 2000 | 348 (3.16) | 4778 | 339 (4.31) | 4535 |
| 2125 | 329 (2.99) | 4578 | 321 (4.08) | 4349 |
| 2250 | 312 (2.83) | 4395 | 305 (3.86) | 4179 |
| 2375 | 297 (2.69) | 4228 | 290 (3.66) | 4024 |
| 2500 | 283 (2.56) | 4076 | 276 (3.48) | 3881 |
| 2625 | 270 (2.44) | 3936 | 263 (3.32) | 3752 |
| 2750 | 258 (2.33) | 3809 | 252 (3.17) | 3579 |
| 2875 | 247 (2.23) | 3669 | 241 (3.03) | 3417 |
| 3000 | 237 (2.14) | 3510 | 232 (2.91) | 3270 |
| 3125 | 228 (2.06) | 3366 | 223 (2.79) | 3135 |
| 3250 | 220 (1.99) | 3234 | 215 (2.69) | 3012 |
| 3375 | 213 (1.92) | 3113 | 208 (2.60) | 2899 |
| 3500 | 206 (1.86) | 3002 | 201 (2.51) | 2796 |
| 3625 | 200 (1.80) | 2900 | 195 (2.43) | 2701 |
| 3750 | 194 (1.74) | 2806 | 189 (2.36) | 2614 |
| 3875 | 188 (1.69) | 2719 | 184 (2.29) | 2533 |
| 4000 | 183 (1.65) | 2638 | 179 (2.22) | 2457 |
| 4125 | 179 (1.61) | 2562 | 175 (2.16) | 2387 |
| 4250 | 174 (1.56) | 2490 | 170 (2.11) | 2320 |
| 4375 | 170 (1.53) | 2423 | 166 (2.06) | 2258 |
| 4500 | 166 (1.49) | 2359 | 162 (2.01) | 2198 |
| 4625 | 162 (1.46) | 2297 | 159 (1.96) | 2140 |
| 4750 | 159 (1.42) | 2238 | 155 (1.91) | 2085 |
| 4875 | 155 (1.39) | 2180 | 152 (1.87) | 2032 |
| 5000 | 152 (1.36) | 2125 | 148 (1.82) | 1980 |
| 5125 | 148 (1.33) | 2070 | 145 (1.78) | 1930 |
| 5250 | 145 (1.30) | 2017 | 142 (1.74) | 1881 |
| 5375 | 142 (1.27) | 1966 | 139 (1.70) | 1833 |
| 5500 | 139 (1.24) | 1916 | 136 (1.66) | 1786 |
| 5625 | 136 (1.12) | 1867 | 133 (1.62) | 1740 |
| 5750 | 133 (1.19) | 1820 | 130 (1.59) | 1697 |
| 5875 | 130 (1.16) | 1774 | 127 (1.55) | 1654 |
| 6000 | 127 (1.14) | 1731 | 124 (1.52) | 1614 |
| 6125 | 125 (1.11) | 1690 | 122 (1.49) | 1577 |
| 6250 | 123 (1.09) | 1653 | 120 (1.46) | 1542 |
| 6375 | 120 (1.07) | 1619 | 118 (1.43) | 1510 |
| 6500 | 119 (1.06) | 1590 | 116 (1.41) | 1483 |
| 6625 | 117 (1.04) | 1565 | 114 (1.39) | 1460 |
| 6750 | 116 (1.03) | 1546 | 113 (1.37) | 1443 |
| 6875 | 115 (1.02) | 1534 | 113 (1.36) | 1432 |
| 7000 | 115 (1.02) | 1530 | 112 (1.36) | 1428 |
| 7125 Or More | 115 (1.02) | 1531 | 112 (1.36) | 1428 |
U.S. EPA ASM EMISSION STANDARDS - 1988-90 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 390 (3.54) | 2725 | 381 (4.85) | 2587 |
| 1875 | 368 (3.34) | 2649 | 359 (4.57) | 2435 |
| 2000 | 348 (3.16) | 2499 | 339 (4.31) | 2295 |
| 2125 | 329 (2.99) | 2360 | 321 (4.08) | 2167 |
| 2250 | 312 (2.83) | 2232 | 305 (3.86) | 2050 |
| 2375 | 297 (2.69) | 2115 | 290 (3.66) | 1943 |
| 2500 | 283 (2.56) | 2009 | 276 (3.48) | 1845 |
| 2625 | 270 (2.44) | 1912 | 263 (3.32) | 1756 |
| 2750 | 258 (2.33) | 1823 | 252 (3.17) | 1675 |
| 2875 | 247 (2.23) | 1742 | 241 (3.03) | 1601 |
| 3000 | 237 (2.14) | 1668 | 232 (2.91) | 1533 |
| 3125 | 228 (2.06) | 1601 | 223 (2.79) | 1471 |
| 3250 | 220 (1.99) | 1539 | 215 (2.69) | 1415 |
| 3375 | 213 (1.92) | 1483 | 208 (2.60) | 1363 |
| 3500 | 206 (1.86) | 1432 | 201 (2.51) | 1316 |
| 3625 | 200 (1.80) | 1384 | 195 (2.43) | 1273 |
| 3750 | 194 (1.74) | 1340 | 189 (2.36) | 1233 |
| 3875 | 188 (1.69) | 1300 | 184 (2.29) | 1195 |
| 4000 | 183 (1.65) | 1262 | 179 (2.22) | 1161 |
| 4125 | 179 (1.61) | 1227 | 175 (2.16) | 1126 |
| 4250 | 174 (1.56) | 1194 | 170 (2.11) | 1098 |
| 4375 | 170 (1.53) | 1162 | 166 (2.06) | 1069 |
| 4500 | 166 (1.49) | 1132 | 162 (2.01) | 1042 |
| 4625 | 162 (1.46) | 1104 | 159 (1.96) | 1015 |
| 4750 | 159 (1.42) | 1076 | 155 (1.91) | 990 |
| 4875 | 155 (1.39) | 1049 | 152 (1.87) | 966 |
| 5000 | 152 (1.36) | 1023 | 148 (1.82) | 942 |
| 5125 | 148 (1.33) | 998 | 145 (1.78) | 919 |
| 5250 | 145 (1.30) | 974 | 142 (1.74) | 896 |
| 5375 | 142 (1.27) | 950 | 139 (1.70) | 874 |
| 5500 | 139 (1.24) | 926 | 136 (1.66) | 853 |
| 5625 | 136 (1.12) | 904 | 133 (1.62) | 832 |
| 5750 | 133 (1.19) | 882 | 130 (1.59) | 812 |
| 5875 | 130 (1.16) | 860 | 127 (1.55) | 793 |
| 6000 | 127 (1.14) | 840 | 124 (1.52) | 774 |
| 6125 | 125 (1.11) | 822 | 122 (1.49) | 757 |
| 6250 | 123 (1.09) | 804 | 120 (1.46) | 741 |
| 6375 | 120 (1.07) | 788 | 118 (1.43) | 727 |
| 6500 | 119 (1.06) | 775 | 116 (1.41) | 714 |
| 6625 | 117 (1.04) | 763 | 114 (1.39) | 704 |
| 6750 | 116 (1.03) | 755 | 113 (1.37) | 696 |
| 6875 | 115 (1.02) | 749 | 113 (1.36) | 691 |
| 7000 Or More | 115 (1.02) | 747 | 112 (1.36) | 689 |
U.S. EPA ASM EMISSION STANDARDS - 1991-95 LIGHT DUTY TRUCKS (6000 GVWR OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 324 (2.78) | 2272 | 315 (3.64) | 2114 |
| 1875 | 306 (2.63) | 2181 | 297 (3.43) | 1991 |
| 2000 | 289 (2.48) | 2058 | 281 (3.24) | 1877 |
| 2125 | 274 (2.35) | 1944 | 267 (3.06) | 1774 |
| 2250 | 260 (2.23) | 1839 | 253 (2.90) | 1678 |
| 2375 | 247 (2.12) | 1744 | 241 (2.76) | 1592 |
| 2500 | 236 (2.02) | 1657 | 230 (2.62) | 1512 |
| 2625 | 225 (1.92) | 1577 | 219 (2.50) | 1440 |
| 2750 | 216 (1.84) | 1504 | 210 (2.39) | 1374 |
| 2875 | 207 (1.76) | 1438 | 210 (2.29) | 1313 |
| 3000 | 199 (1.69) | 1378 | 194 (2.19) | 1258 |
| 3125 | 191 (1.63) | 1323 | 186 (2.11) | 1208 |
| 3250 | 185 (1.57) | 1273 | 180 (2.03) | 1163 |
| 3375 | 179 (1.52) | 1227 | 174 (1.96) | 1121 |
| 3500 | 173 (1.47) | 1184 | 169 (1.89) | 1082 |
| 3625 | 168 (1.42) | 1146 | 164 (1.84) | 1047 |
| 3750 | 163 (1.38) | 1110 | 159 (1.78) | 1014 |
| 3875 | 159 (1.34) | 1077 | 155 (1.73) | 984 |
| 4000 | 155 (1.31) | 1046 | 151 (1.68) | 956 |
| 4125 | 151 (1.27) | 1017 | 147 (1.64) | 930 |
| 4250 | 147 (1.24) | 990 | 143 (1.60) | 905 |
| 4375 | 144 (1.21) | 964 | 140 (1.56) | 882 |
| 4500 | 141 (1.18) | 939 | 137 (1.52) | 859 |
| 4625 | 137 (1.15) | 916 | 134 (1.48) | 838 |
| 4750 | 134 (1.13) | 893 | 131 (1.45) | 818 |
| 4875 | 132 (1.10) | 872 | 128 (1.42) | 798 |
| 5000 | 129 (1.08) | 850 | 126 (1.38) | 778 |
| 5125 | 126 (1.05) | 830 | 123 (1.35) | 760 |
| 5250 | 123 (1.03) | 810 | 120 (1.32) | 741 |
| 5375 | 121 (1.01) | 790 | 118 (1.29) | 723 |
| 5500 | 118 (0.99) | 771 | 115 (1.26) | 706 |
| 5625 | 116 (0.97) | 752 | 113 (1.24) | 689 |
| 5750 | 113 (0.94) | 734 | 111 (1.21) | 673 |
| 5875 | 111 (0.92) | 717 | 108 (1.18) | 657 |
| 6000 | 109 (0.91) | 701 | 106 (1.16) | 642 |
| 6125 | 107 (0.89) | 685 | 104 (1.13) | 628 |
| 6250 | 105 (.087) | 671 | 102 (1.11) | 615 |
| 6375 | 103 (0.86) | 658 | 101 (1.09) | 604 |
| 6500 | 102 (0.84) | 647 | 99 (1.08) | 593 |
| 6625 | 101 (0.83) | 638 | 98 (1.06) | 585 |
| 6750 | 100 (0.82) | 631 | 97 (1.05) | 578 |
| 6875 | 99 (0.82) | 626 | 97 (1.04) | 574 |
| 7000 | 99 (0.82) | 624 | 96 (1.04) | 573 |
| 7125 Or More | 98 (0.81) | 625 | 96 (1.04) | 573 |
U.S. EPA ASM EMISSION STANDARDS - 1994 + TIER 1 LIGHT DUTY TRUCKS (3750 LVW OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 142 (0.80) | 1212 | 136 (0.77) | 1095 |
| 1875 | 134 (0.75) | 1142 | 129 (0.73) | 1031 |
| 2000 | 127 (0.71) | 1077 | 123 (0.69) | 973 |
| 2125 | 121 (0.68) | 1018 | 116 (0.66) | 920 |
| 2250 | 115 (0.64) | 964 | 111 (0.62) | 871 |
| 2375 | 109 (0.61) | 915 | 106 (0.59) | 827 |
| 2500 | 105 (0.59) | 869 | 101 (0.57) | 786 |
| 2625 | 100 (0.56) | 828 | 97 (0.54) | 749 |
| 2750 | 96 (0.54) | 791 | 93 (0.52) | 715 |
| 2875 | 92 (0.52) | 756 | 89 (0.50) | 684 |
| 3000 | 89 (0.50) | 725 | 86 (0.48) | 656 |
| 3125 | 86 (0.48) | 696 | 83 (0.46) | 630 |
| 3250 | 83 (0.46) | 670 | 80 (0.45) | 607 |
| 3375 | 81 (0.45) | 647 | 78 (0.43) | 585 |
| 3500 | 78 (0.44) | 625 | 76 (0.42) | 566 |
| 3625 | 76 (0.42) | 605 | 74 (0.41) | 547 |
| 3750 | 74 (0.41) | 586 | 72 (0.40) | 531 |
| 3875 | 72 (0.40) | 569 | 70 (0.39) | 515 |
| 4000 | 71 (0.39) | 553 | 68 (0.38) | 501 |
| 4125 | 69 (0.38) | 538 | 67 (0.37) | 487 |
| 4250 | 67 (0.37) | 524 | 65 (0.36) | 475 |
| 4375 | 66 (0.36) | 510 | 64 (0.35) | 463 |
| 4500 | 65 (0.36) | 498 | 63 (0.35) | 440 |
| 4625 | 63 (0.35) | 486 | 61 (0.34) | 440 |
| 4750 | 62 (0.34) | 474 | 60 (0.33) | 430 |
| 4875 | 61 (0.34) | 463 | 59 (0.33) | 420 |
| 5000 | 60 (0.33) | 452 | 58 (0.32) | 410 |
| 5125 | 58 (0.32) | 441 | 57 (0.31) | 400 |
| 5250 | 57 (0.32) | 431 | 56 (0.31) | 391 |
| 5375 | 56 (0.31) | 420 | 55 (0.30) | 382 |
| 5500 | 55 (0.30) | 410 | 54 (0.30) | 373 |
| 5625 | 54 (0.30) | 401 | 53 (0.29) | 364 |
| 5750 | 53 (0.29) | 391 | 52 (0.29) | 356 |
| 5875 | 52 (0.29) | 383 | 51 (0.28) | 348 |
| 6000 | 51 (0.28) | 374 | 50 (0.28) | 340 |
| 6125 | 50 (0.28) | 366 | 49 (0.27) | 333 |
| 6250 | 50 (0.27) | 359 | 48 (0.27) | 326 |
| 6375 | 49 (0.27) | 352 | 48 (0.26) | 320 |
| 6500 | 48 (0.26) | 346 | 47 (0.26) | 315 |
| 6625 | 48 (0.26) | 341 | 46 (0.26) | 311 |
| 6750 | 47 (0.26) | 338 | 46 (0.26) | 307 |
| 6875 | 47 (0.26) | 335 | 46 (0.25) | 305 |
| 7000 Or More | 47 (0.25) | 335 | 46 (0.25) | 305 |
U.S. EPA ASM EMISSION STANDARDS - 1994 + TIER 1 LIGHT DUTY TRUCKS (3751 LVW OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 224 (1.26) | 1819 | 216 (1.22) | 1642 |
| 1875 | 212 (1.19) | 1713 | 205 (1.16) | 1547 |
| 2000 | 201 (1.13) | 1616 | 194 (1.09) | 1460 |
| 2125 | 191 (1.07) | 1527 | 184 (1.04) | 1380 |
| 2250 | 182 (1.02) | 1446 | 175 (0.99) | 1307 |
| 2375 | 173 (0.97) | 1372 | 167 (0.94) | 1240 |
| 2500 | 166 (0.93) | 1304 | 160 (0.90) | 1179 |
| 2625 | 159 (0.89) | 1242 | 153 (0.86) | 1123 |
| 2750 | 152 (0.85) | 1186 | 147 (0.82) | 1072 |
| 2875 | 146 (0.82) | 1134 | 141 (0.79) | 1026 |
| 3000 | 141 (0.79) | 1088 | 136 (0.76) | 984 |
| 3125 | 136 (0.76) | 1045 | 132 (0.73) | 945 |
| 3250 | 132 (0.73) | 1006 | 127 (0.71) | 910 |
| 3375 | 128 (0.71) | 970 | 123 (0.69) | 878 |
| 3500 | 124 (0.69) | 937 | 120 (0.67) | 848 |
| 3625 | 120 (0.67) | 907 | 117 (0.65) | 821 |
| 3750 | 117 (0.65) | 879 | 114 (0.63) | 796 |
| 3875 | 114 (0.63) | 853 | 111 (0.61) | 773 |
| 4000 | 112 (0.62) | 829 | 108 (0.60) | 751 |
| 4125 | 109 (0.60) | 807 | 106 (0.58) | 731 |
| 4250 | 107 (0.59) | 786 | 103 (0.57) | 712 |
| 4375 | 104 (0.58) | 766 | 101 (0.56) | 694 |
| 4500 | 102 (0.57) | 747 | 99 (0.55) | 677 |
| 4625 | 100 (0.55) | 728 | 97 (0.54) | 661 |
| 4750 | 98 (0.54) | 711 | 95 (0.53) | 645 |
| 4875 | 96 (0.53) | 694 | 93 (0.52) | 630 |
| 5000 | 94 (0.52) | 677 | 92 (0.51) | 615 |
| 5125 | 93 (0.51) | 661 | 90 (0.50) | 600 |
| 5250 | 91 (0.50) | 646 | 88 (0.49) | 586 |
| 5375 | 89 (0.49) | 631 | 86 (0.48) | 573 |
| 5500 | 87 (0.48) | 616 | 85 (0.47) | 559 |
| 5625 | 86 (0.47) | 601 | 83 (0.46) | 546 |
| 5750 | 84 (0.46) | 587 | 82 (0.45) | 534 |
| 5875 | 83 (0.45) | 574 | 80 (0.44) | 522 |
| 6000 | 81 (0.44) | 561 | 79 (0.44) | 510 |
| 6125 | 80 (0.44) | 549 | 78 (0.43) | 499 |
| 6250 | 79 (0.43) | 538 | 76 (0.42) | 489 |
| 6375 | 77 (0.42) | 528 | 75 (0.42) | 480 |
| 6500 | 76 (0.42) | 519 | 74 (0.41) | 473 |
| 6625 | 76 (0.41) | 512 | 74 (0.41) | 466 |
| 6750 | 75 (0.41) | 507 | 73 (0.41) | 461 |
| 6875 | 75 (0.40) | 503 | 73 (0.40) | 458 |
| 7000 Or More | 74 (0.40) | 502 | 72 (0.40) | 457 |
U.S. EPA ASM EMISSION STANDARDS - 1968-72 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 1118 (8.02) | 4990 | 1098 (9.90) | 4990 |
| 1875 | 1052 (7.56) | 4990 | 1034 (9.90) | 4990 |
| 2000 | 992 (7.14) | 4990 | 975 (9.90) | 4990 |
| 2125 | 938 (6.75) | 4990 | 921 (9.66) | 4990 |
| 2250 | 887 (6.40) | 4990 | 872 (9.14) | 4990 |
| 2375 | 841 (6.07) | 4990 | 827 (8.67) | 4990 |
| 2500 | 800 (5.78) | 4990 | 786 (8.25) | 4990 |
| 2625 | 761 (5.51) | 4990 | 748 (7.85) | 4990 |
| 2750 | 726 (5.26) | 4990 | 714 (7.50) | 4772 |
| 2875 | 695 (5.03) | 4892 | 683 (7.17) | 4556 |
| 3000 | 666 (4.83) | 4680 | 654 (6.87) | 4359 |
| 3125 | 639 (4.64) | 4488 | 628 (6.60) | 4180 |
| 3250 | 615 (4.47) | 4311 | 604 (6.35) | 4016 |
| 3375 | 593 (4.31) | 4150 | 583 (6.13) | 3866 |
| 3500 | 573 (4.17) | 4002 | 563 (5.92) | 3728 |
| 3625 | 554 (4.04) | 3867 | 544 (5.73) | 3602 |
| 3750 | 537 (3.91) | 3741 | 527 (5.55) | 3485 |
| 3875 | 521 (3.80) | 3625 | 512 (5.39) | 3377 |
| 4000 | 506 (3.70) | 3517 | 497 (5.24) | 3276 |
| 4125 | 492 (3.60) | 3416 | 484 (5.09) | 3182 |
| 4250 | 479 (3.51) | 3321 | 471 (4.96) | 3094 |
| 4375 | 467 (3.42) | 3230 | 459 (4.83) | 3010 |
| 4500 | 455 (3.34) | 3145 | 447 (4.71) | 2930 |
| 4625 | 444 (3.26) | 3063 | 436 (4.60) | 2854 |
| 4750 | 433 (3.18) | 2983 | 425 (4.49) | 2780 |
| 4875 | 423 (3.11) | 2907 | 415 (4.38) | 2709 |
| 5000 | 412 (3.03) | 2833 | 405 (4.28) | 2640 |
| 5125 | 402 (2.97) | 2760 | 395 (4.18) | 2573 |
| 5250 | 393 (2.90) | 2690 | 386 (4.08) | 2507 |
| 5375 | 383 (2.83) | 2621 | 376 (3.98) | 2443 |
| 5500 | 374 (2.77) | 2554 | 367 (3.89) | 2381 |
| 5625 | 365 (2.70) | 2489 | 359 (3.80) | 2321 |
| 5750 | 357 (2.64) | 2426 | 350 (3.71) | 2262 |
| 5875 | 348 (2.59) | 2366 | 342 (3.62) | 2206 |
| 6000 | 341 (2.53) | 2308 | 334 (3.54) | 2152 |
| 6125 | 333 (2.48) | 2254 | 327 (3.47) | 2102 |
| 6250 | 326 (2.43) | 2204 | 320 (3.40) | 2056 |
| 6375 | 320 (2.39) | 2159 | 314 (3.34) | 2014 |
| 6500 | 315 (2.35) | 2119 | 309 (3.28) | 1977 |
| 6625 | 310 (2.32) | 2087 | 304 (3.23) | 1947 |
| 6750 | 307 (2.29) | 2062 | 301 (3.20) | 1924 |
| 6875 | 305 (2.28) | 2046 | 299 (3.17) | 1909 |
| 7000 | 304 (2.27) | 2040 | 298 (3.17) | 1904 |
| 7125 Or More | 304 (2.27) | 2045 | 298 (3.17) | 1904 |
U.S. EPA ASM EMISSION STANDARDS - 1973-74 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 1118 (8.02) | 4990 | 1098 (9.90) | 4980 |
| 1875 | 1052 (7.56) | 4990 | 1034 (9.90) | 4906 |
| 2000 | 992 (7.14) | 4919 | 975 (9.90) | 4838 |
| 2125 | 938 (6.75) | 4853 | 921 (9.66) | 4776 |
| 2250 | 887 (6.40) | 4792 | 872 (9.14) | 4720 |
| 2375 | 841 (6.07) | 4736 | 827 (8.67) | 4668 |
| 2500 | 800 (5.78) | 4685 | 786 (8.25) | 4620 |
| 2625 | 761 (5.51) | 4639 | 748 (7.85) | 4577 |
| 2750 | 726 (5.26) | 4596 | 714 (7.50) | 4374 |
| 2875 | 695 (5.03) | 4484 | 683 (7.17) | 4176 |
| 3000 | 666 (4.83) | 4290 | 654 (6.87) | 3996 |
| 3125 | 639 (4.64) | 4114 | 628 (6.60) | 3832 |
| 3250 | 615 (4.47) | 3952 | 604 (6.35) | 3681 |
| 3375 | 593 (4.31) | 3804 | 583 (6.13) | 3544 |
| 3500 | 573 (4.17) | 3669 | 563 (5.92) | 3418 |
| 3625 | 554 (4.04) | 3544 | 544 (5.73) | 3302 |
| 3750 | 537 (3.91) | 3429 | 527 (5.55) | 3195 |
| 3875 | 521 (3.80) | 3323 | 512 (5.39) | 3096 |
| 4000 | 506 (3.70) | 3224 | 497 (5.24) | 3003 |
| 4125 | 492 (3.60) | 3131 | 484 (5.09) | 2917 |
| 4250 | 479 (3.51) | 3044 | 471 (4.96) | 2836 |
| 4375 | 467 (3.42) | 2961 | 459 (4.83) | 2759 |
| 4500 | 455 (3.34) | 2883 | 447 (4.71) | 2686 |
| 4625 | 444 (3.26) | 2807 | 436 (4.60) | 2616 |
| 4750 | 433 (3.18) | 2735 | 425 (4.49) | 2549 |
| 4875 | 423 (3.11) | 2665 | 415 (4.38) | 2483 |
| 5000 | 412 (3.03) | 2597 | 405 (4.28) | 2420 |
| 5125 | 402 (2.97) | 2530 | 395 (4.18) | 2359 |
| 5250 | 393 (2.90) | 2466 | 386 (4.08) | 2298 |
| 5375 | 383 (2.83) | 2403 | 376 (3.98) | 2240 |
| 5500 | 374 (2.77) | 2341 | 367 (3.89) | 2183 |
| 5625 | 365 (2.70) | 2282 | 359 (3.80) | 2127 |
| 5750 | 357 (2.64) | 2224 | 350 (3.71) | 2074 |
| 5875 | 348 (2.59) | 2168 | 342 (3.62) | 2022 |
| 6000 | 341 (2.53) | 2116 | 334 (3.54) | 1973 |
| 6125 | 333 (2.48) | 2066 | 327 (3.47) | 1927 |
| 6250 | 326 (2.43) | 2020 | 320 (3.40) | 1884 |
| 6375 | 320 (2.39) | 1979 | 314 (3.34) | 1846 |
| 6500 | 315 (2.35) | 1943 | 309 (3.28) | 1813 |
| 6625 | 310 (2.32) | 1913 | 304 (3.23) | 1785 |
| 6750 | 307 (2.29) | 1890 | 301 (3.20) | 1764 |
| 6875 | 305 (2.28) | 1875 | 299 (3.17) | 1750 |
| 7000 | 304 (2.27) | 1870 | 298 (3.17) | 1745 |
| 7125 Or More | 304 (2.27) | 1874 | 298 (3.17) | 1745 |
U.S. EPA ASM EMISSION STANDARDS - 1975-78 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 843 (5.07) | 4990 | 828 (7.26) | 4980 |
| 1875 | 794 (4.78) | 4990 | 780 (6.84) | 4906 |
| 2000 | 749 (4.51) | 4919 | 736 (6.45) | 4838 |
| 2125 | 707 (4.26) | 4853 | 695 (6.10) | 4776 |
| 2250 | 669 (4.04) | 4792 | 658 (5.78) | 4720 |
| 2375 | 635 (3.83) | 4736 | 624 (5.48) | 4668 |
| 2500 | 603 (3.65) | 4685 | 593 (5.21) | 4620 |
| 2625 | 574 (3.48) | 4639 | 564 (4.96) | 4577 |
| 2750 | 548 (3.32) | 4596 | 539 (4.73) | 4374 |
| 2875 | 524 (3.18) | 4484 | 515 (4.53) | 4176 |
| 3000 | 502 (3.05) | 4290 | 493 (4.34) | 3996 |
| 3125 | 482 (2.93) | 4114 | 474 (4.17) | 3832 |
| 3250 | 464 (2.82) | 3952 | 456 (4.01) | 3681 |
| 3375 | 447 (2.72) | 3804 | 440 (3.87) | 3544 |
| 3500 | 432 (2.63) | 3669 | 424 (3.74) | 3418 |
| 3625 | 418 (2.55) | 3544 | 411 (3.62) | 3302 |
| 3750 | 405 (2.47) | 3429 | 398 (3.51) | 3195 |
| 3875 | 393 (2.40) | 3323 | 386 (3.40) | 3096 |
| 4000 | 382 (2.33) | 3224 | 375 (3.31) | 3003 |
| 4125 | 371 (2.27) | 3131 | 365 (3.22) | 2917 |
| 4250 | 361 (2.21) | 3044 | 355 (3.13) | 2836 |
| 4375 | 352 (2.16) | 2961 | 346 (3.05) | 2759 |
| 4500 | 343 (2.11) | 2883 | 337 (2.98) | 2686 |
| 4625 | 335 (2.06) | 2807 | 329 (2.90) | 2616 |
| 4750 | 327 (2.01) | 2735 | 321 (2.83) | 2549 |
| 4875 | 319 (1.96) | 2665 | 313 (2.77) | 2483 |
| 5000 | 311 (1.92) | 2597 | 305 (2.70) | 2420 |
| 5125 | 304 (1.87) | 2530 | 298 (2.64) | 2359 |
| 5250 | 296 (1.83) | 2466 | 291 (2.58) | 2298 |
| 5375 | 289 (1.79) | 2403 | 284 (2.51) | 2240 |
| 5500 | 282 (1.75) | 2341 | 277 (2.46) | 2183 |
| 5625 | 276 (1.71) | 2282 | 271 (2.40) | 2127 |
| 5750 | 269 (1.67) | 2224 | 264 (2.34) | 2074 |
| 5875 | 263 (1.63) | 2168 | 258 (2.29) | 2022 |
| 6000 | 257 (1.60) | 2116 | 252 (2.24) | 1973 |
| 6125 | 251 (1.57) | 2066 | 247 (2.19) | 1927 |
| 6250 | 246 (1.54) | 2020 | 242 (2.15) | 1884 |
| 6375 | 242 (1.51) | 1979 | 237 (2.11) | 1846 |
| 6500 | 238 (1.48) | 1943 | 233 (2.07) | 1813 |
| 6625 | 234 (1.46) | 1913 | 230 (2.04) | 1785 |
| 6750 | 232 (1.45) | 1890 | 227 (2.02) | 1764 |
| 6875 | 230 (1.44) | 1875 | 225 (2.00) | 1750 |
| 7000 | 229 (1.43) | 1870 | 225 (2.00) | 1745 |
| 7125 Or More | 229 (1.43) | 1874 | 225 (2.00) | 1745 |
U.S. EPA ASM EMISSION STANDARDS - 1979-83 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 774 (4.31) | 4990 | 761 (6.06) | 4960 |
| 1875 | 729 (4.06) | 4990 | 717 (5.70) | 4738 |
| 2000 | 688 (3.83) | 4778 | 676 (5.38) | 4535 |
| 2125 | 650 (3.63) | 4578 | 638 (5.09) | 4349 |
| 2250 | 615 (3.44) | 4395 | 604 (4.82) | 4179 |
| 2375 | 583 (3.26) | 4228 | 573 (4.57) | 4024 |
| 2500 | 554 (3.10) | 4076 | 544 (4.35) | 3881 |
| 2625 | 528 (2.96) | 3936 | 518 (4.14) | 3752 |
| 2750 | 503 (2.83) | 3809 | 495 (3.95) | 3579 |
| 2875 | 481 (2.71) | 3669 | 473 (3.78) | 3417 |
| 3000 | 461 (2.60) | 3510 | 453 (3.62) | 3270 |
| 3125 | 443 (2.50) | 3366 | 435 (3.48) | 3135 |
| 3250 | 426 (2.40) | 3234 | 419 (3.35) | 3012 |
| 3375 | 411 (2.32) | 3113 | 404 (3.23) | 2899 |
| 3500 | 397 (2.24) | 3002 | 390 (3.12) | 2796 |
| 3625 | 384 (2.17) | 2900 | 377 (3.02) | 2701 |
| 3750 | 372 (2.11) | 2806 | 365 (2.93) | 2614 |
| 3875 | 361 (2.05) | 2719 | 355 (2.58) | 2533 |
| 4000 | 351 (1.99) | 2638 | 345 (2.77) | 2457 |
| 4125 | 341 (1.94) | 2562 | 335 (2.69) | 2387 |
| 4250 | 332 (1.89) | 2490 | 326 (2.62) | 2320 |
| 4375 | 323 (1.84) | 2423 | 318 (2.55) | 2258 |
| 4500 | 315 (1.80) | 2359 | 310 (2.49) | 2198 |
| 4625 | 308 (1.76) | 2297 | 302 (2.43) | 2140 |
| 4750 | 300 (1.72) | 2238 | 295 (2.37) | 2085 |
| 4875 | 293 (1.68) | 2180 | 288 (2.32) | 2032 |
| 5000 | 286 (1.64) | 2125 | 281 (2.26) | 1980 |
| 5125 | 279 (1.60) | 2070 | 274 (2.21) | 1930 |
| 5250 | 272 (1.56) | 2017 | 267 (2.16) | 1881 |
| 5375 | 26 (1.53) | 1966 | 261 (2.11) | 1833 |
| 5500 | 259 (1.49) | 1916 | 255 (2.06) | 1786 |
| 5625 | 253 (1.46) | 1867 | 248 (2.01) | 1740 |
| 5750 | 247 (1.43) | 1820 | 243 (1.96) | 1697 |
| 5875 | 241 (1.40) | 1774 | 237 (1.92) | 1654 |
| 6000 | 236 (1.37) | 1731 | 232 (1.88) | 1614 |
| 6125 | 231 (1.34) | 1690 | 227 (1.84) | 1577 |
| 6250 | 226 (1.31) | 1653 | 222 (1.80) | 1542 |
| 6375 | 222 (1.29) | 1619 | 218 (1.77) | 1510 |
| 6500 | 218 (1.27) | 1590 | 214 (1.74) | 1483 |
| 6625 | 215 (1.25) | 1565 | 211 (1.72) | 1460 |
| 6750 | 213 (1.24) | 1546 | 209 (1.70) | 1443 |
| 6875 | 211 (1.23) | 1534 | 207 (1.68) | 1432 |
| 7000 | 211 (1.23) | 1530 | 207 (1.68) | 1428 |
| 7125 Or More | 211 (1.22) | 1531 | 206 (1.68) | 1428 |
U.S. EPA ASM EMISSION STANDARDS - 1984-87 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 390 (3.54) | 4990 | 381 (4.85) | 4960 |
| 1875 | 368 (3.34) | 4990 | 359 (4.57) | 4738 |
| 2000 | 348 (3.16) | 4778 | 339 (4.31) | 4535 |
| 2125 | 329 (2.99) | 4578 | 321 (4.08) | 4349 |
| 2250 | 312 (2.83) | 4395 | 305 (3.86) | 4179 |
| 2375 | 297 (2.69) | 4228 | 290 (3.66) | 4024 |
| 2500 | 283 (2.56) | 4076 | 276 (3.48) | 3881 |
| 2625 | 270 (2.44) | 3936 | 263 (3.32) | 3752 |
| 2750 | 258 (2.33) | 3809 | 252 (3.17) | 3579 |
| 2875 | 247 (2.23) | 3669 | 241 (3.03) | 3417 |
| 3000 | 237 (2.14) | 3510 | 232 (2.91) | 3270 |
| 3125 | 228 (2.06) | 3366 | 223 (2.79) | 3135 |
| 3250 | 220 (1.99) | 3234 | 215 (2.69) | 3012 |
| 3375 | 213 (1.92) | 3113 | 208 (2.60) | 2899 |
| 3500 | 206 (1.86) | 3002 | 201 (2.51) | 2796 |
| 3625 | 200 (1.80) | 2900 | 195 (2.43) | 2701 |
| 3750 | 194 (1.74) | 2806 | 189 (2.36) | 2614 |
| 3875 | 188 (1.69) | 2719 | 184 (2.29) | 2533 |
| 4000 | 183 (1.65) | 2638 | 179 (2.22) | 2457 |
| 4125 | 179 (1.61) | 2562 | 175 (2.16) | 2387 |
| 4250 | 174 (1.56) | 2490 | 170 (2.11) | 2320 |
| 4375 | 170 (1.53) | 2423 | 166 (2.06) | 2258 |
| 4500 | 166 (1.49) | 2359 | 162 (2.01) | 2198 |
| 4625 | 162 (1.46) | 2297 | 159 (1.96) | 2140 |
| 4750 | 159 (1.42) | 2238 | 155 (1.91) | 2085 |
| 4875 | 155 (1.39) | 2180 | 152 (1.87) | 2032 |
| 5000 | 152 (1.36) | 2125 | 148 (1.82) | 1980 |
| 5125 | 148 (1.33) | 2070 | 145 (1.78) | 1930 |
| 5250 | 145 (1.30) | 2017 | 142 (1.74) | 1881 |
| 5375 | 142 (1.27) | 1966 | 139 (1.70) | 1833 |
| 5500 | 139 (1.24) | 1916 | 136 (1.66) | 1786 |
| 5625 | 136 (1.12) | 1867 | 133 (1.62) | 1740 |
| 5750 | 133 (1.19) | 1820 | 130 (1.59) | 1697 |
| 5875 | 130 (1.16) | 1774 | 127 (1.55) | 1654 |
| 6000 | 127 (1.14) | 1731 | 124 (1.52) | 1614 |
| 6125 | 125 (1.11) | 1690 | 122 (1.49) | 1577 |
| 6250 | 123 (1.09) | 1653 | 120 (1.46) | 1542 |
| 6375 | 120 (1.07) | 1619 | 118 (1.43) | 1510 |
| 6500 | 119 (1.06) | 1590 | 116 (1.41) | 1483 |
| 6625 | 117 (1.04) | 1565 | 114 (1.39) | 1460 |
| 6750 | 116 (1.03) | 1546 | 113 (1.37) | 1443 |
| 6875 | 115 (1.02) | 1534 | 113 (1.36) | 1432 |
| 7000 | 115 (1.02) | 1530 | 112 (1.36) | 1428 |
| 7125 Or More | 115 (1.02) | 1531 | 112 (1.36) | 1428 |
U.S. EPA ASM EMISSION STANDARDS - 1988-90 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 390 (3.54) | 4084 | 381 (4.85) | 4005 |
| 1875 | 368 (3.34) | 4054 | 359 (4.57) | 3767 |
| 2000 | 348 (3.16) | 3824 | 339 (4.31) | 3548 |
| 2125 | 329 (2.99) | 3609 | 321 (4.08) | 3348 |
| 2250 | 312 (2.83) | 3411 | 305 (3.86) | 3165 |
| 2375 | 297 (2.69) | 3231 | 290 (3.66) | 2998 |
| 2500 | 283 (2.56) | 3066 | 276 (3.48) | 2845 |
| 2625 | 270 (2.44) | 2916 | 263 (3.32) | 2706 |
| 2750 | 258 (2.33) | 2779 | 252 (3.17) | 2579 |
| 2875 | 247 (2.23) | 2654 | 241 (3.03) | 2463 |
| 3000 | 237 (2.14) | 2539 | 232 (2.91) | 2357 |
| 3125 | 228 (2.06) | 2435 | 223 (2.79) | 2260 |
| 3250 | 220 (1.99) | 2340 | 215 (2.69) | 2172 |
| 3375 | 213 (1.92) | 2253 | 208 (2.60) | 2092 |
| 3500 | 206 (1.86) | 2174 | 201 (2.51) | 2018 |
| 3625 | 200 (1.80) | 2100 | 195 (2.43) | 1950 |
| 3750 | 194 (1.74) | 2033 | 189 (2.36) | 1887 |
| 3875 | 188 (1.69) | 1970 | 184 (2.29) | 1829 |
| 4000 | 183 (1.65) | 1912 | 179 (2.22) | 1775 |
| 4125 | 179 (1.61) | 1857 | 175 (2.16) | 1724 |
| 4250 | 174 (1.56) | 1806 | 170 (2.11) | 1677 |
| 4375 | 170 (1.53) | 1757 | 166 (2.06) | 1632 |
| 4500 | 166 (1.49) | 1711 | 162 (2.01) | 1589 |
| 4625 | 162 (1.46) | 1666 | 159 (1.96) | 1548 |
| 4750 | 159 (1.42) | 1624 | 155 (1.91) | 1508 |
| 4875 | 155 (1.39) | 1583 | 152 (1.87) | 1470 |
| 5000 | 152 (1.36) | 1542 | 148 (1.82) | 1433 |
| 5125 | 148 (1.33) | 1503 | 145 (1.78) | 1397 |
| 5250 | 145 (1.30) | 1465 | 142 (1.74) | 1362 |
| 5375 | 142 (1.27) | 1428 | 139 (1.70) | 1327 |
| 5500 | 139 (1.24) | 1392 | 136 (1.66) | 1294 |
| 5625 | 136 (1.12) | 1357 | 133 (1.62) | 1261 |
| 5750 | 133 (1.19) | 1323 | 130 (1.59) | 1230 |
| 5875 | 130 (1.16) | 1290 | 127 (1.55) | 1199 |
| 6000 | 127 (1.14) | 1259 | 124 (1.52) | 1171 |
| 6125 | 125 (1.11) | 1230 | 122 (1.49) | 1144 |
| 6250 | 123 (1.09) | 1203 | 120 (1.46) | 1119 |
| 6375 | 120 (1.07) | 1179 | 118 (1.43) | 1096 |
| 6500 | 119 (1.06) | 1158 | 116 (1.41) | 1077 |
| 6625 | 117 (1.04) | 1140 | 114 (1.39) | 1060 |
| 6750 | 116 (1.03) | 1127 | 113 (1.37) | 1048 |
| 6875 | 115 (1.02) | 1118 | 113 (1.36) | 1040 |
| 7000 Or More | 115 (1.02) | 1115 | 112 (1.36) | 1037 |
U.S. EPA ASM EMISSION STANDARDS - 1991-95 LIGHT DUTY TRUCKS (6001 GVWR OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 324 (2.78) | 3631 | 315 (3.64) | 3532 |
| 1875 | 306 (2.63) | 3586 | 297 (3.43) | 3323 |
| 2000 | 289 (2.48) | 3383 | 281 (3.24) | 3131 |
| 2125 | 274 (2.35) | 3192 | 267 (3.06) | 2955 |
| 2250 | 260 (2.23) | 3018 | 253 (2.90) | 2794 |
| 2375 | 247 (2.12) | 2859 | 241 (2.76) | 2646 |
| 2500 | 236 (2.02) | 2714 | 230 (2.62) | 2512 |
| 2625 | 225 (1.92) | 2581 | 219 (2.50) | 2389 |
| 2750 | 216 (1.84) | 2460 | 210 (2.39) | 2277 |
| 2875 | 207 (1.76) | 2350 | 210 (2.29) | 2175 |
| 3000 | 199 (1.69) | 2249 | 194 (2.19) | 2082 |
| 3125 | 191 (1.63) | 2157 | 186 (2.11) | 1997 |
| 3250 | 185 (1.57) | 2073 | 180 (2.03) | 1920 |
| 3375 | 179 (1.52) | 1997 | 174 (1.96) | 1849 |
| 3500 | 173 (1.47) | 1926 | 169 (1.89) | 1784 |
| 3625 | 168 (1.42) | 1862 | 164 (1.84) | 1724 |
| 3750 | 163 (1.38) | 1802 | 159 (1.78) | 1669 |
| 3875 | 159 (1.34) | 1747 | 155 (1.73) | 1618 |
| 4000 | 155 (1.31) | 1695 | 151 (1.68) | 1570 |
| 4125 | 151 (1.27) | 1647 | 147 (1.64) | 1526 |
| 4250 | 147 (1.24) | 1602 | 143 (1.60) | 1484 |
| 4375 | 144 (1.21) | 1559 | 140 (1.56) | 1444 |
| 4500 | 141 (1.18) | 1518 | 137 (1.52) | 1406 |
| 4625 | 137 (1.15) | 1479 | 134 (1.48) | 1370 |
| 4750 | 134 (1.13) | 1441 | 131 (1.45) | 1336 |
| 4875 | 132 (1.10) | 1405 | 128 (1.42) | 1302 |
| 5000 | 129 (1.08) | 1369 | 126 (1.38) | 1269 |
| 5125 | 126 (1.05) | 1335 | 123 (1.35) | 1237 |
| 5250 | 123 (1.03) | 1031 | 120 (1.32) | 1206 |
| 5375 | 121 (1.01) | 1269 | 118 (1.29) | 1176 |
| 5500 | 118 (0.99) | 1237 | 115 (1.26) | 1147 |
| 5625 | 116 (0.97) | 1206 | 113 (1.24) | 1118 |
| 5750 | 113 (0.94) | 1176 | 111 (1.21) | 1090 |
| 5875 | 111 (0.92) | 1147 | 108 (1.18) | 1064 |
| 6000 | 109 (0.91) | 1120 | 106 (1.16) | 1039 |
| 6125 | 107 (0.89) | 1094 | 104 (1.13) | 1015 |
| 6250 | 105 (.087) | 1070 | 102 (1.11) | 993 |
| 6375 | 103 (0.86) | 1049 | 101 (1.09) | 973 |
| 6500 | 102 (0.84) | 1030 | 99 (1.08) | 956 |
| 6625 | 101 (0.83) | 1014 | 98 (1.06) | 941 |
| 6750 | 100 (0.82) | 1003 | 97 (1.05) | 931 |
| 6875 | 99 (0.82) | 995 | 97 (1.04) | 924 |
| 7000 | 99 (0.82) | 992 | 96 (1.04) | 921 |
| 7125 Or More | 98 (0.81) | 992 | 96 (1.04) | 921 |
U.S. EPA ASM EMISSION STANDARDS - 1994 + TIER 1 LIGHT DUTY TRUCKS (5750 LVW OR LESS)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 224 (1.26) | 1819 | 216 (1.22) | 1642 |
| 1875 | 212 (1.19) | 1713 | 205 (1.16) | 1547 |
| 2000 | 201 (1.13) | 1616 | 194 (1.09) | 1460 |
| 2125 | 191 (1.07) | 1527 | 184 (1.04) | 1380 |
| 2250 | 182 (1.02) | 1446 | 175 (0.99) | 1307 |
| 2375 | 173 (0.97) | 1372 | 167 (0.94) | 1240 |
| 2500 | 166 (0.93) | 1304 | 160 (0.90) | 1179 |
| 2625 | 159 (0.89) | 1242 | 153 (0.86) | 1123 |
| 2750 | 152 (0.85) | 1186 | 147 (0.82) | 1072 |
| 2875 | 146 (0.82) | 1134 | 141 (0.79) | 1026 |
| 3000 | 141 (0.79) | 1088 | 136 (0.76) | 984 |
| 3125 | 136 (0.76) | 1045 | 132 (0.73) | 945 |
| 3250 | 132 (0.73) | 1006 | 127 (0.71) | 910 |
| 3375 | 128 (0.71) | 970 | 123 (0.69) | 878 |
| 3500 | 124 (0.69) | 937 | 120 (0.67) | 848 |
| 3625 | 120 (0.67) | 907 | 117 (0.65) | 821 |
| 3750 | 117 (0.65) | 879 | 114 (0.63) | 796 |
| 3875 | 114 (0.63) | 853 | 111 (0.61) | 773 |
| 4000 | 112 (0.62) | 829 | 108 (0.60) | 751 |
| 4125 | 109 (0.60) | 807 | 106 (0.58) | 731 |
| 4250 | 107 (0.59) | 786 | 103 (0.57) | 712 |
| 4375 | 104 (0.58) | 766 | 101 (0.56) | 694 |
| 4500 | 102 (0.57) | 747 | 99 (0.55) | 677 |
| 4625 | 100 (0.55) | 728 | 97 (0.54) | 661 |
| 4750 | 98 (0.54) | 711 | 95 (0.53) | 645 |
| 4875 | 96 (0.53) | 694 | 93 (0.52) | 630 |
| 5000 | 94 (0.52) | 677 | 92 (0.51) | 615 |
| 5125 | 93 (0.51) | 661 | 90 (0.50) | 600 |
| 5250 | 91 (0.50) | 646 | 88 (0.49) | 586 |
| 5375 | 89 (0.49) | 631 | 86 (0.48) | 573 |
| 5500 | 87 (0.48) | 616 | 85 (0.47) | 559 |
| 5625 | 86 (0.47) | 601 | 83 (0.46) | 546 |
| 5750 | 84 (0.46) | 587 | 82 (0.45) | 534 |
| 5875 | 83 (0.45) | 574 | 80 (0.44) | 522 |
| 6000 | 81 (0.44) | 561 | 79 (0.44) | 510 |
| 6125 | 80 (0.44) | 549 | 78 (0.43) | 499 |
| 6250 | 79 (0.43) | 538 | 76 (0.42) | 489 |
| 6375 | 77 (0.42) | 528 | 75 (0.42) | 480 |
| 6500 | 76 (0.42) | 519 | 74 (0.41) | 473 |
| 6625 | 76 (0.41) | 512 | 74 (0.41) | 466 |
| 6750 | 75 (0.41) | 507 | 73 (0.41) | 461 |
| 6875 | 75 (0.40) | 503 | 73 (0.40) | 458 |
| 7000 Or More | 74 (0.40) | 502 | 72 (0.40) | 457 |
U.S. EPA ASM EMISSION STANDARDS - 1994 + TIER 1 LIGHT DUTY TRUCKS (5751 LVW OR MORE)
| Test Weight | ASM5015 | ASM2525 | ||
|---|---|---|---|---|
| HC ppm (CO %) | NOx ppm | HC ppm (CO %) | NOx ppm | |
| 1750 | 324 (2.78) | 3178 | 315 (3.64) | 3060 |
| 1875 | 306 (2.63) | 3117 | 297 (3.43) | 2879 |
| 2000 | 289 (2.48) | 2941 | 281 (3.24) | 2713 |
| 2125 | 274 (2.35) | 2776 | 267 (3.06) | 2561 |
| 2250 | 260 (2.23) | 2625 | 253 (2.90) | 2422 |
| 2375 | 247 (2.12) | 2487 | 241 (2.76) | 2295 |
| 2500 | 236 (2.02) | 2361 | 230 (2.62) | 2179 |
| 2625 | 225 (1.92) | 2246 | 219 (2.50) | 2073 |
| 2750 | 216 (1.84) | 2142 | 210 (2.39) | 1976 |
| 2875 | 207 (1.76) | 2046 | 210 (2.29) | 1888 |
| 3000 | 199 (1.69) | 1959 | 194 (2.19) | 1808 |
| 3125 | 191 (1.63) | 1879 | 186 (2.11) | 1734 |
| 3250 | 185 (1.57) | 1806 | 180 (2.03) | 1667 |
| 3375 | 179 (1.52) | 1740 | 174 (1.96) | 1606 |
| 3500 | 173 (1.47) | 1679 | 169 (1.89) | 1550 |
| 3625 | 168 (1.42) | 1623 | 164 (1.84) | 1498 |
| 3750 | 163 (1.38) | 1571 | 159 (1.78) | 1451 |
| 3875 | 159 (1.34) | 1523 | 155 (1.73) | 1407 |
| 4000 | 155 (1.31) | 1479 | 151 (1.68) | 1365 |
| 4125 | 151 (1.27) | 1437 | 147 (1.64) | 1327 |
| 4250 | 147 (1.24) | 1398 | 143 (1.60) | 1291 |
| 4375 | 144 (1.21) | 1360 | 140 (1.56) | 1257 |
| 4500 | 141 (1.18) | 1325 | 137 (1.52) | 1224 |
| 4625 | 137 (1.15) | 1291 | 134 (1.48) | 1193 |
| 4750 | 134 (1.13) | 1259 | 131 (1.45) | 1163 |
| 4875 | 132 (1.10) | 1227 | 128 (1.42) | 1134 |
| 5000 | 129 (1.08) | 1196 | 126 (1.38) | 1106 |
| 5125 | 126 (1.05) | 1167 | 123 (1.35) | 1078 |
| 5250 | 123 (1.03) | 1138 | 120 (1.32) | 1051 |
| 5375 | 121 (1.01) | 1109 | 118 (1.29) | 1025 |
| 5500 | 118 (0.99) | 1082 | 115 (1.26) | 1000 |
| 5625 | 116 (0.97) | 1055 | 113 (1.24) | 975 |
| 5750 | 113 (0.94) | 1029 | 111 (1.21) | 951 |
| 5875 | 111 (0.92) | 1004 | 108 (1.18) | 928 |
| 6000 | 109 (0.91) | 980 | 106 (1.16) | 906 |
| 6125 | 107 (0.89) | 958 | 104 (1.13) | 886 |
| 6250 | 105 (.087) | 937 | 102 (1.11) | 867 |
| 6375 | 103 (0.86) | 919 | 101 (1.09) | 850 |
| 6500 | 102 (0.84) | 902 | 99 (1.08) | 835 |
| 6625 | 101 (0.83) | 889 | 98 (1.06) | 823 |
| 6750 | 100 (0.82) | 879 | 97 (1.05) | 813 |
| 6875 | 99 (0.82) | 872 | 97 (1.04) | 807 |
| 7000 | 99 (0.82) | 870 | 96 (1.04) | 805 |
| 7125 Or More | 98 (0.81) | 870 | 96 (1.04) | 805 |