Chapter 740 - Implementation of Oklahoma's Water Quality Standards
- Subchapter 1 - General Provisions (§§ 252:740-1-1 — 252:740-1-6)
- Subchapter 3 - Implementation of Narrative Toxics Criteria to Protect Aquatic Life Using Whole Effluent Toxicity (WET) Testing (§§ 252:740-3-1 — 252:740-3-5)
- Subchapter 5 - Implementation of Numerical Criteria to Protect Fish and Wildlife from Toxicity Due to Conservative Substances (§§ 252:740-5-1 — 252:740-5-4)
- Subchapter 7 - Implementation of Numerical Criteria to Protect Human Health from Toxicity Due to Conservative Substances (§§ 252:740-7-1 — 252:740-7-3)
- Subchapter 9 - Implementation of Criteria to Protect the Agriculture Beneficial Use (§§ 252:740-9-1 — 252:740-9-4)
- Subchapter 11 - Implementation of Temperature Criteria to Protect Fish and Wildlife Propagation (§§ 252:740-11-1 — 252:740-11-5)
- Subchapter 13 - Implementation of Antidegradation Policy (§§ 252:740-13-1 — 252:740-13-8)
- Subchapter 15 - Use Support Assessment Protocols (§§ 252:740-15-1 — 252:740-15-12)
- Subchapter 17 - Implementation of Dissolved Oxygen Criteria to Protect Fish and Wildlife Propagation (§§ 252:740-17-1 — 252:740-17-3)
- Appendix A - [Effective until 9/15/2023] Reserved
- Appendix A - [Effective 9/15/2023] Reserved
- Appendix B - [Effective until 9/15/2023] Mean Hardness (CACO[3]) and PH by Stream Segment
- Appendix B - [Effective 9/15/2023] Mean Hardness (CACO3) and PH by Stream Segment
- Appendix C - [Effective until 9/15/2023] Index of Biological Integrity
- Appendix C - [Effective 9/15/2023] Index of Biological Integrity