# 2026-16001: EPA Nods to Illinois Ozone Control Tech Tweaks

2026-16001, Air Plan Approval; Illinois; 2015 Ozone Moderate and Serious Reasonably Available Control Technology Update, is a Federal Register proposed rule from Environmental Protection Agency published 2026-08-06, effective Comments must be received on or before September 8, 2026.; PRIA reads it as touching household money (as of 2026-08-13).

- Canonical: https://policyrisk.com/federal-register/2026-16001
- As of: 2026-08-13
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-16001
- Title: Air Plan Approval; Illinois; 2015 Ozone Moderate and Serious Reasonably Available Control Technology Update
- Type: Proposed Rule
- Agencies: Environmental Protection Agency
- Citation: 91 FR 50746
- Published: 2026-08-06
- Effective: Comments must be received on or before September 8, 2026.
- Comments close: 2026-09-08
- Significant: no
- Touches household money: yes
- Regulation identifier numbers: none
- Last updated: 2026-08-13

## In one line

EPA Nods to Illinois Ozone Control Tech Tweaks

## Summary

The U.S. Environmental Protection Agency (EPA) is proposing to approve revisions to 35 Illinois Administrative Code (IAC) parts 217, 218, and 219 into the Illinois State Implementation Plan (SIP). The Illinois Environmental Protection Agency (Illinois or Illinois EPA) submitted these revisions on December 18, 2024, and May 12, 2025, supplemented their submittal on August 13, 2025, for Moderate Reasonably Available Control Technology (RACT). The EPA is proposing to approve 35 IAC parts 217, 218, and 219 as satisfying the Moderate Volatile Organic Compound (VOC) RACT and NO<INF>X</INF> RACT requirements as well as Serious NO<INF>X</INF> RACT requirements for the Chicago, IL (Cook County, DuPage County, Grundy County, Kane County, Kendall County, Lake County, McHenry County, and Will County) and Metro-East St. Louis (Madison County, Monroe County, and St. Clair County) nonattainment areas under the 2015 ozone National Ambient Air Quality Standard (NAAQS or standard).

## Effects PRIA read

- Illinois SIP RACT Approval for Chicago/Metro‑East: cost, medium. If you operate major air‑emitting sources in the Chicago or Metro‑East nonattainment areas, EPA is proposing to approve Illinois rules (35 IAC parts 217, 218, and 219) into the State Implementation Plan so those rules satisfy Moderate VOC and NOX RACT and Serious NOX RACT under the 2015 ozone stand…
- Voluntary Emissions Averaging Option with 10% Cut: mixed, medium. Illinois' rules let eligible sources choose a voluntary emissions averaging plan (an Economic Incentive Program) instead of meeting unit limits, but sources that opt into averaging must achieve an additional 10 percent emissions reduction as a presumptive requirement. Participation in the averaging…
- Flint Hills Pine Bend Permit Incorporated into SIP: mixed, low. EPA is proposing to incorporate Illinois Federally Enforceable State Operating Permit No. 83100026 for the Flint Hills Pine Bend facility (issued June 20, 2024) into the SIP to satisfy RACT for sources covered by the Oil and Natural Gas CTG in the Metro‑East area. The permit requires an external fl…

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## Sources
- [2026-16001 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/06/2026-16001/air-plan-approval-illinois-2015-ozone-moderate-and-serious-reasonably-available-control-technology)
- [2026-16001 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-06/pdf/2026-16001.pdf)

## Related
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- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-16001 (as of 2026-08-13).