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House advances measure to let state raise cap on vehicle emissions test fees for Front Range
Summary
Lawmakers debated and approved Senate Bill 321 to authorize Colorado to raise the cap used by contractors to charge for vehicle emissions tests in the Front Range nonattainment area, aiming to add testing capacity and fund repair assistance; critics pressed for metrics and questioned whether the change would meaningfully reduce ozone.
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DENVER — The Colorado House on May 5 approved Senate Bill 321, a bill that authorizes the state to raise the legal cap used to set fees for vehicle emissions tests in the Front Range ozone nonattainment area to support more testing stations, modernize equipment and expand repair programs.
Representative James Joseph, one of the bill—s sponsors, told the committee the vehicle inspection program —provides real benefits to reducing ozone, and is a key strategy to fixing our summertime ozone problem.— He and co-sponsor Representative Gonzales said the program has not kept pace with population growth and that contractors have warned they will not continue operating under the present cap.
The bill applies in the Front Range nonattainment counties that include Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson, Larimer and Weld. Sponsors said the increase is intended to let the Department of Public Health and Environment and its contractor invest in additional testing kiosks and upgraded equipment and expand repair assistance for low-income motorists.
Opponents pressed for evidence that expanding or raising the cap would produce measurable air-quality gains. Representative Mark DeGraaf repeatedly asked for explicit metrics and models showing how much ozone precursor reduction the program would achieve, saying the bill —doesn't include the precursors that come in from the upslope— and that —we should have a scientific analysis— before expanding the program.
Representative Joseph cited a 2022 state auditor report that found the emissions inspection program decreased ozone precursors by about 13 percent (roughly 10 tons per day) and said the bill is TABOR neutral because the state itself collects only about 25 cents per test; the change seeks authority to raise the cap contractors can charge, not to raise the state fee.
Supporters also said the market for contractors is thin. Representative Gonzales said the department conducted outreach and found only one qualified vendor currently operating the program in Colorado; she said keeping the contractor in state requires raising the cap so vendors can make investments and pay workers a state-appropriate wage.
After debate and several unsuccessful floor amendments to lower the cap, the House approved the bill. The Senate-passed bill returns to the Senate for final action and to reconcile any House changes.
What happened next: The House recorded the bill—s passage and sent it forward; the chamber did not include a roll-call count in the segment of the transcript that reported the passage.
Why it matters: Colorado's Front Range continues to be designated a nonattainment area for ozone by federal standards. Emissions from on-road vehicles are a primary contributor to ozone precursors in the region, and the state—s emissions testing program is a federally required element of the state implementation plan to control ozone.

