HB 101 Air Quality Emissions Testing Amendments


  • Requires any county in the PM2.5 non-attainment area that currently does not have a county-wide diesel emissions testing program to implement a 3-year pilot program.
  • The program will allow the most recent 5 model years to be exempt from testing, along with agricultural and construction vehicles.


  • Rep. Patrice Arent, D - Millcreek
  • Sen. Curtis Bramble, R - 



Diesel vehicles that fall out of compliance are 7-8 times more polluting than a comparable gasoline vehicle. This bill would require that all non-attainment counties require light and medium duty diesel vehicles and trucks under 14,000 pounds to undergo emissions inspections, including a visual inspection to look for modifications and tampering of emissions control systems. 

  • Testing and repairing diesels in Utah County would reduce emissions by 170 tons per year
  • $3,500 per ton counting $20 test fee/vehicle and repair costs
  • At the last SIP round, the area source rule cost per ton reduced was $280 - $6500/ton
  • Cost per ton reduced by industrial sources averaged $25,000


2/13. House Natural Resources. Passed Favorable Recommendation. 12-0-1

2/23. Passed Full House. 56-15-4 

2/23. To Senate.

2/26. Senate Business and Labor. Favorable Recommendation 5-0-3

3/6. Passed Senate 2nd Reading 18-5-6

3/7. Passed Senate 3rd Reading 23-0-6

Scheduled Hearings

2/13. 8:00. NRAE. Capitol Rm 445. AGENDA

2/26. 8:00. Senate Biz & Labor. Senate Rm 215. AGENDA

Additional Info

  • Bills: HB 101