Air Care Colorado

Emissions Limits for 1982 & Newer Light-Duty Vehicles

The following charts shows emissions limits for 1982 through 2011 model year light-duty passenger vehicles and trucks for carbon monoxide (CO), hydrocarbons (HC) and oxides of nitrogen (NOx) by vehicle model year. 1982 and newer vehicles are tested with the I/M 240 dynamometer test. Pollutants are collected and measured in grams per mile. The following chart reflects the standards change implemented in May 2008.

1982 & Newer Light-Duty Passenger Vehicle Limits

Model YearCOHCNOx
198245.03.55.0
198330.03.54.5
198430.03.54.5
198520.02.54.5
198620.02.54.5
198720.02.54.0
198820.02.04.0
198920.02.04.0
199020.02.03.5
199120.01.53.5
199215.01.53.5
199315.01.53.5
199415.01.23.0
199515.01.22.5
199615.01.22.0
199715.01.22.0
199815.01.21.5
199915.01.21.5
2000 +15.01.21.5

CO: carbon monoxide   HC: hydrocarbons
Source:  Colorado Department of Public Health and Environment

1982 & Newer Light-Duty Truck Limits

Model YearCOHCNOx
198265.06.06.0
198365.06.06.0
198455.05.06.0
198545.04.56.0
198640.04.06.0
198730.03.55.5
198825.03.05.0
198925.03.05.0
199025.03.05.0
199125.02.54.5
199225.02.54.5
199325.02.54.5
199420.02.04.0
199520.02.04.0
199615.01.23.5
199715.01.23.0
199815.01.22.5
199915.01.22.0
2000 +15.01.22.0

CO: carbon monoxide   HC: hydrocarbons
Source: Colorado Department of Public Health and Environment