State Standards in Effect for CWA Purposes
- [See Ohio Water Quality Standards 3475-1-01 through 3475-1-40 ]
- [See Ohio Water Quality Standards 3475-1-50 through 3475-1-54 ]
Note: These regulations contain additional provisions related to the development of National Pollutant Discharge Elimination System permits that may be outside the scope of the federal water quality standards regulations. However, the regulations are included here as supplementary information.
- [See 3745-2-02. Definition ]
(Effective December 24, 2002) - [See 3745-2-04 Determinations Preliminary to Development of Water Quality-Based Effluent Limitations ]
(Effective June 7, 2011) - [See 3745-2-05. Calculating Wasteload Allocations ]
(Effective December 24, 2002) - [See 3745-2-06 Application of Preliminary Effluent Limitations ]
(Effective October 31, 1997) - [See 3745-2-07. Additive Effects of Pollutants ]
(Effective December 24, 2002) - [See 3745-2-08. Mixing Zone Demonstration and Sizing Requirements ]
(Effective December 24, 2002) - [See 3745-2-09. Whole Effluent Toxicity Provisions and Water Quality Based Effluent Limit Calculation Procedures ]
(Effective December 24, 2002) - [See 3745-2-12. Total Maximum Daily Loads ]
(Effective June 7, 2011) - [See 3745-33-07. Establishing Permit Conditions ]
(Effective December 24, 2002)
Note: EPA disapproved provisions at OAC 3745-33-07(B) for determining reasonable potential for a discharge to cause or contribute to an exceedance of Ohio's whole effluent toxicity requirements. Pursuant to the Great Lakes Guidance contained at 40 CFR 132, these provisions are replaced by federal provisions contained at 40 CFR 132, Appendix F, Procedure 6, Section C, paragraph 1 and Section D.
Federally Proposed or Promulgated Standards
- Final Water Quality Standards Bacteria Rule for Coastal and Great Lakes Recreation Waters (November 8, 2004)
- Identification of Approved and Disapproved Elements of the Great Lakes Guidance Submissions from Michigan, Ohio, Indiana, and Illinois and Final Rule (August 4, 2000)
- Ohio Water Quality Standards 3475-1-01 through 3475-1-40 (PDF)(498 pp, 4 MB)
- Ohio Water Quality Standards 3475-1-50 through 3475-1-54 (PDF)(29 pp, 604 K)
- 3745-2-02. Definition (PDF)(12 pp, 120 K)
- 3745-2-04 Determinations Preliminary to Development of Water Quality-Based Effluent Limitations (PDF)(13 pp, 95 K)
- 3745-2-05. Calculating Wasteload Allocations (PDF)(7 pp, 95 K)
- 3745-2-06 Application of Preliminary Effluent Limitations (PDF)(11 pp, 71 K)
- 3745-2-07. Additive Effects of Pollutants (PDF)(4 pp, 81 K)
- 3745-2-08. Mixing Zone Demonstration and Sizing Requirements (PDF)(11 pp, 107 K)
- 3745-2-09. Whole Effluent Toxicity Provisions and Water Quality Based Effluent Limit Calculation Procedures (PDF)(5 pp, 84 K)
- 3745-2-12. Total Maximum Daily Loads (PDF)(6 pp, 75 K)
- 3745-33-07. Establishing Permit Conditions (PDF)(17 pp, 155 K)