{"data":{"id":"us-va/9vac5-91-160","jurisdiction":"us-va","citation":"9VAC5-91-160","heading":"Exhaust emission standards for two-speed idle testing in enhanced emissions inspection programs","body":"Emission Standards for Motor Vehicle Air Pollution\n\nA. No motor vehicle subject to the two-speed idle test shall discharge carbon monoxide (CO), or hydrocarbons (HC) in its exhaust emissions in excess of standards set forth in Table III-A when measured with a certified analyzer system and in accordance with the two-speed idle inspection procedures prescribed in Part VI (9VAC5-91-410 et seq.).\n\nB. The measured concentration of CO plus CO2 shall be greater than or equal to 6.0%.\n\nC. The standards in Table III-A may be adjusted by no more than one percentage point for CO and 150 ppm for HC in order to meet the requirements of the Environmental Protection Agency or the federal Clean Air Act.\n\nTABLE III-A.\n\nEXHAUST EMISSION STANDARDS FOR TWO-SPEED IDLE EMISSIONS   INSPECTIONS TESTS.\n\nModel Year\n\nHC (ppm)\n\nCO (%)\n\nFor idle test and 2500 RPM test for vehicles up to 8500   pounds GVWR:\n\n1996 \u0026 later\n\n110\n\n0.75\n\n1990-95\n\n125\n\n1.0\n\n1981-89\n\n220\n\n1.2\n\n1980\n\n220\n\n2.0\n\n1975-79\n\n400\n\n4.0\n\n1970‑74\n\n600\n\n6.0\n\n1968‑69\n\n800\n\n8.0\n\nFor vehicles from 8501 to 10000 pounds GVWR:\n\n1997 \u0026 later\n\n125\n\n0.75\n\n1991-96\n\n150\n\n1.0\n\n1981-90\n\n220\n\n1.2\n\n1980\n\n220\n\n2.0\n\n1975-79\n\n400\n\n4.0\n\n1970-74\n\n600\n\n6.0\n\n1968-69\n\n800\n\n8.0","path":["Title 9. Environment","Agency 5. State Air Pollution Control Board","Chapter 91. Regulations for the Control of Motor Vehicle Emissions in the Northern Virginia Area"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency5/chapter91/section160/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:48:41Z","sha256":"5b0956282e363379cee2d8eea1ce3e946cedc4a4b58f4c6e0e596d2853b259ef","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac5-91-150","next":"us-va/9vac5-91-170"},"notice":"GroundRules: Original legal text. Not legal advice."}