EPA Approves Connecticut's Tougher Air Quality Rules for Cleaner Skies
Published Date: 11/20/2025
Rule
Summary
The EPA just gave a thumbs-up to Connecticut’s updated air pollution rules, including new limits on dangerous chemicals like 1-bromopropane. This means businesses in Connecticut will follow clearer, stronger rules to keep the air cleaner starting December 22, 2025. No big costs are expected, but everyone should get ready for these important changes to protect health and the environment.
Analyzed Economic Effects
3 provisions identified: 0 benefits, 2 costs, 1 mixed.
State Adds 1‑Bromopropane to HAPs List
Connecticut revised its definition of “hazardous air pollutant” to match the federal list in CAA section 112(b)(1), including EPA’s addition of 1‑bromopropane. EPA approved that revision, and the approval is effective December 22, 2025.
Premises‑Wide HAP Limits Below Title V Thresholds
Connecticut amended RCSA sections 22a-174-33a and 22a-174-33b to revise limits on potential to emit hazardous air pollutants so premises‑wide emissions are limited below Title V source thresholds (sections reference 50% and 80% thresholds). EPA approved these revisions effective December 22, 2025.
Not Approved on Indian Reservation Land
EPA did not approve Connecticut’s submission to apply on any Indian reservation land or in any area where an Indian tribe has demonstrated jurisdiction; in those areas the approval does not apply and the rule will not impose direct costs on tribal governments.
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