# 2026-15998: EPA nods to Indiana, Illinois water rule tweaks

2026-15998, Public Water System Supervision Program Revision Approvals for the States of Indiana and Illinois, is a Federal Register notice from Environmental Protection Agency published 2026-08-06, effective 2026-09-08; PRIA reads it as touching household money (as of 2026-08-13).

- Canonical: https://policyrisk.com/federal-register/2026-15998
- As of: 2026-08-13
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-15998
- Title: Public Water System Supervision Program Revision Approvals for the States of Indiana and Illinois
- Type: Notice
- Agencies: Environmental Protection Agency
- Citation: 91 FR 50831
- Published: 2026-08-06
- Effective: 2026-09-08
- 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 Indiana, Illinois water rule tweaks

## Summary

Notice is hereby given that the Environmental Protection Agency (EPA) has approved the State of Indiana's revisions to its Public Water System Supervision (PWSS) Program under the federal Safe Drinking Water Act (SDWA) for revisions to four National Primary Drinking Water Regulations (NPDWRs): the Ground Water Rule (GWR), Lead and Copper Rule--Short Term Revisions (LCR-STR), Long-Term 2 Enhanced Surface Water Treatment Rule (LT2 ESWTR), and the Stage 2 Disinfectants and Disinfection Byproducts Rule (Stage 2 D/DBPR). The EPA has determined that the State of Indiana's PWSS program regulations and the revisions thereto are no less stringent than the above corresponding federal regulations and thus give the Indiana Department of Environmental Management primary enforcement responsibility for the GWR, LCR-STR, LT2 ESWTR, and Stage 2 D/DBPR. Notice is also hereby given that the EPA has approved the State of Illinois' revisions to its PWSS program under SDWA for adoption of the Filter Backwash Recycling Rule (FBRR). The EPA has determined that the State of Illinois' PWSS Program regulations and the revisions thereto are no less stringent than the NPDWR and thus give the Illinois Environmental Protection Agency primary enforcement responsibility for the FBRR. These determinations on the Indiana and Illinois requests for approval of such primacy enforcement responsibility shall take effect in accordance with procedures described below, subject to timely substantial requests for public hearing. This approval action does not extend to public water systems in Indian Country. By approving this revision, the EPA does not intend to affect the rights of federally recognized Indian Tribes in either Indiana or Illinois, nor does it intend to limit existing rights of either the State of Indiana or the State of Illinois.

## Effects PRIA read

- Indiana Gets Primacy for Four Water Rules: mixed, low. The EPA approved Indiana’s Public Water System Supervision program revisions and gave the Indiana Department of Environmental Management primary enforcement responsibility for four federal drinking-water rules: the Ground Water Rule (GWR), Lead and Copper Rule—Short Term Revisions (LCR-STR), Long-T…
- Illinois Gains Primacy for Filter Backwash Rule: mixed, low. The EPA approved Illinois’ adoption of the Filter Backwash Recycling Rule (FBRR) into its Public Water System Supervision program and gave the Illinois Environmental Protection Agency primary enforcement responsibility for the FBRR. This determination becomes final and effective on September 8, 202…
- Approval Does Not Cover Indian Country: mixed, low. The EPA’s approvals do not extend to public water systems in Indian Country; tribal public water systems in Indiana and Illinois are not covered by these state primacy approvals. The approvals do not change or intend to affect the rights of federally recognized Indian Tribes in either State.

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## Sources
- [2026-15998 on federalregister.gov](https://www.federalregister.gov/documents/2026/08/06/2026-15998/public-water-system-supervision-program-revision-approvals-for-the-states-of-indiana-and-illinois)
- [2026-15998 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-08-06/pdf/2026-15998.pdf)

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Source: PRIA, https://policyrisk.com/federal-register/2026-15998 (as of 2026-08-13).