Connecticut's Ozone Rules Get EPA's Proposed Thumbs-Up
Published Date: 11/20/2025
Proposed Rule
Summary
The EPA wants to approve Connecticut’s updated air rules to keep ozone pollution limits in line with national standards and clear up how to measure chemicals in adhesives and sealants. This affects manufacturers and helps keep the air cleaner for everyone. Comments on these changes are open until December 22, 2025, so now’s the time to speak up!
Analyzed Economic Effects
2 provisions identified: 2 benefits, 0 costs, 0 mixed.
Connecticut Adopts 0.070 ppm Ozone Standard
You in Connecticut are covered by an 8-hour ozone air quality standard set at 0.070 parts per million (ppm) because EPA is proposing to approve Connecticut's April 30, 2025 SIP revision that adds this standard to RCSA 22a-174-24. The change aligns Connecticut's standard with the federal 2015 ozone National Ambient Air Quality Standard (NAAQS) and is intended to protect public health and the environment.
Clarified VOC Calculations for Adhesives/Sealants
If you manufacture or sell adhesives, sealants, or related primers in Connecticut, RCSA 22a-174-44 was revised to correct and clarify volatile organic compound (VOC) calculation methods for low-solids and non-low-solids adhesives, sealants, adhesive primers, and sealant primers. EPA is proposing to approve those clarifications into the Connecticut SIP, which affects how VOC content is determined under state regulation.
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