Authority: IC 13-14-8; IC 13-14-9; IC 13-15-1-2; IC 13-15-2-1; IC 13-18-3-1; IC 13-18-4-1

Affected: IC 13-18

Sec. 1.1. Between October 30, 2024, and November 1, 2027, community water systems and nontransient noncommunity water systems must comply with the following provisions of the CFR instead of the lead and copper provisions incorporated by reference under section 1 of this rule:

(1) As codified July 1, 2020:

(A) 40 CFR 141.2*;

(B) 40 CFR 141.31(d)*;

(C) 40 CFR 141.80 through 141.91*.

(2) As codified July 1, 2024:

(A) 40 CFR 141.84(a)(1) through (10), excluding paragraphs (a)(6) and (7)*;

(B) 40 CFR 141.85(a)(1)(ii) and (e)*;

(C) 40 CFR 141.90(e)(1) and (13), (f)(4), and (h)(3)*;

(D) 40 CFR 141.201(a)(3)(vi) and (c)(3)*;

(E) 40 CFR 141.202(a)(10)*;

(F) 40 CFR part 141, appendix A to subpart Q, entry I.C.1, excluding §141.90, except paragraphs (e)(1) and (13) and (f)(4) and entry I.C.2*;

(G) 40 CFR part 141, appendix B to subpart Q, entry D.23*; and

(H) 40 CFR 141.31(d)(2)*.

*These documents are incorporated by reference. Copies may be obtained from the Government Publishing Office, www.gpo.gov, or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, 100 North Senate Avenue, Thirteenth Floor, Indianapolis, IN 46204.

(Water Pollution Control Division; 327 IAC 8-2.7-1.1; filed Nov 24, 2025, 9:07 a.m.: 20251224-IR-327240428FRA)