# 2025-05910: Connecticut's 2017 pollution stats get EPA thumbs-up

2025-05910, Air Plan Approval; Connecticut; 2017 Base Year Emissions Inventory for the 2015 8-Hour Ozone National Ambient Air Quality Standards, is a Federal Register proposed rule from Environmental Protection Agency published 2025-04-07, effective Written comments must be received on or before May 7, 2025.; PRIA reads it as touching household money (as of 2026-10-07).

- Canonical: https://policyrisk.com/federal-register/2025-05910
- As of: 2026-10-07
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-05910
- Title: Air Plan Approval; Connecticut; 2017 Base Year Emissions Inventory for the 2015 8-Hour Ozone National Ambient Air Quality Standards
- Type: Proposed Rule
- Agencies: Environmental Protection Agency
- Citation: 90 FR 14935
- Published: 2025-04-07
- Effective: Written comments must be received on or before May 7, 2025.
- Comments close: not stated
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-10-07

## In one line

Connecticut's 2017 pollution stats get EPA thumbs-up

## Summary

The EPA is proposing to approve Connecticut’s plan that updates pollution data from 2017 to help meet cleaner air goals for ozone pollution. This affects people living in Greater Connecticut and nearby areas struggling with ozone smog. Comments on this plan are open until May 7, 2025, and the update helps guide future pollution controls without immediate costs.

## Abstract

The Environmental Protection Agency (EPA) is proposing approval of State Implementation Plan (SIP) revisions submitted by the State of Connecticut that relate to the 2015 Ozone National Ambient Air Quality Standards (NAAQS). The SIP revisions are for the Greater Connecticut and the Connecticut portion of the New York-Northern New Jersey-Long Island, NY-NJ-CT ozone nonattainment areas. The intended effect of this action is to propose approval of submittals which include a 2017 base year emissions inventory for the 2015 Ozone National Ambient Air Quality Standard. This action is being taken under the Clean Air Act.

## Effects PRIA read

- EPA proposes approval of CT 2017 emissions inventory: benefit, low. You live in Greater Connecticut or the Connecticut part of the NY-NJ-CT area: EPA is proposing to approve Connecticut’s 2017 base year emissions inventory for the 2015 8-hour ozone standard for those areas. Comments on this proposed approval are due by May 7, 2025, and EPA says the approval helps g…
- Areas reclassified to Serious with 2027 deadline: benefit, medium. EPA has reclassified the Greater Connecticut area and the Connecticut portion of the NY-NJ-CT area to Serious nonattainment for the 2015 8-hour ozone standard. Serious areas must attain the 2015 ozone NAAQS as expeditiously as practicable but no later than August 3, 2027.
- EPA approval adds no new federal burdens: benefit, low. EPA says this proposed approval merely accepts Connecticut law as meeting Clean Air Act requirements and does not impose additional federal requirements, does not create significant economic impacts on a substantial number of small entities, and does not add information-collection burdens. The prop…

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## Sources
- [2025-05910 on federalregister.gov](https://www.federalregister.gov/documents/2025/04/07/2025-05910/air-plan-approval-connecticut-2017-base-year-emissions-inventory-for-the-2015-8-hour-ozone-national)
- [2025-05910 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-04-07/pdf/2025-05910.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2025-05910 (as of 2026-10-07).