Water Quality Standards and Classifications
- Water Quality Act Overview
- DEQ Staff Contacts
- Bob Bukantis, (406) 444-5320
- Mike Suplee, (406) 444-0831
- Amy Steinmetz, (406) 444-0371
- Rod McNeil, (406) 444-5361
- David Feldman, (406) 444-6764
- Randy Apfelbeck, (406) 444-2709
- Art Compton, (406)444-9631
- EPA Water Quality Standards
- Surface and Groundwater Quality Standards and Classifications
- Statute: Montana Water Quality Act
- Rules:
- ARM 17.30.601 through 641 - Surface Water
- ARM 17.30.1001 through 1045 - Groundwater
- Current Circular DEQ-7, Montana Numeric Water Quality Standards - August 2010 (pdf version) - DEQ-7 contains the surface water aquatic life and human health water quality standards and the ground water human health standards. DEQ-7 is revised on an "as need" basis. DEQ-7 dated August 2010 is the most recent version. All previous versions are not in effect. A searchable Excel file version is available. If you have any questions about this document, contact Rod McNeil, 444-5361.
- The spawning time and early life stages of Montana fishes (relevant to DEQ-7 ammonia and dissolved oxygen standards). Prepared by the Montana Department of Fish, Wildlife and Parks, March 2001.
- Mixing Zones in Surface and Groundwater
- Statute: Montana Water Quality Act
- Rules:
- Rules Summary
- Nondegradation of Water Quality
- Statute: Montana Water Quality Act
- Rules:
- Rules Summary
- Numeric Nutrient Criteria Development
- Short-term Exemption from Surface Water Quality Standards for Emergency Remediation/Pesticide Application
- Statute: Montana Water Quality Act
- Standards More Stringent than Federal Standards
- Statute: Montana Water Quality Act
- Site-specific Standards for Water Quality for Aquatic Life
- Statute: Montana Water Quality Act
- Temporary Water Quality Standards
- Statute: Montana Water Quality Act
- Outstanding Resource Waters
- Statute: Montana Water Quality Act
- Nonsignificant Activities
- Statute: Montana Water Quality Act
- Short-term Water Quality Standards for Turbidity Related to Construction Activity
- Statute: Montana Water Quality Act
- Nutrient and algal biomass criteria recommendations for Northeastern Montana
- Reference Study Report
- Smith River Fecal Report
- Conrad Use Attainability Analysis (UAA)
- Montana Macroinvertebrate Indicators Report
- Defining Large Rivers In Montana Using A Wadeability Index
