State Standards in Effect for CWA Purposes
- [See Article 2. Water Quality Standards ]
(Effective May 20, 2015) This document contains water quality standards for all State waters.
Note: EPA disapproved variance provisions contained at 327 IAC 2-1.5-17(b), 327 IAC 5-3-4.1(b)(1), and provisions for determining reasonable potential for whole effluent toxicity at 327 IAC 5-2-11.5(c)(1). These provisions are replaced by federal Great Lakes Guidance provisions contained at 40 CFR 132, Appendix F, Procedure II, Section C, paragraph 1; 40 CFR 132, Appendix F, Procedure 5, Section F, paragraph 2; and 40 CFR 132, Appendix F, Procedure 6, Section C, paragraph 1 and Section D, respectively.
- [See Article 5. 327 IAC 5-3.5. Streamlined Mercury Variance Requirements and Application Process ]
(Effective December 20, 2005) Section 327 IAC 5-3.5 was added to establish a process and application requirements for obtaining a variance from the existing water quality criterion used to establish a water quality-based effluent limitation for mercury in wastewater discharges permitted under the National Pollutant Discharge Elimination System (NPDES) program.
Federally Proposed or Promulgated Standards
- Federal Regulations, 40 CFR 132, Appendix F
(Effective July 1, 2000) Great Lakes Water Quality Initiative Implementation Procedures.
Federal Clean Water Act Determinations that New or Revised Standards Are Necessary
- Identification of Approved and Disapproved Elements of the Great Lakes Guidance Submissions from Michigan, Ohio, Indiana, and Illinois and Final Rule (August 4, 2000)