Water

Circulars, Forms and Regulations

Drinking Water

National Drinking Water Regulations
Public Water and Sewage Systems
Consumer Confidence Report Rule
Disinfectant Byproducts Rule
Lead and Copper Rule
Montana Chlorination Rule
Nitrates/Nitrites
Subdivisions/On-Site Subsurface Wastewater Treatment Rules
Public Notification Rule
Source Water Protection Delineation
Surface Water Treatment Rule
Total Coliform Rule
Water Treatment Operators
Drinking Water State Revolving Fund

Permitting

Water Quality Permits Statute
Montana Pollution Discharge Elimination System Rules
Montana Groundwater Pollution Control System (MGWPCS) Rules
401 Certification
Nutrient Trading
Permit Application, Degradation Authorization, and Annual Fees
Stormwater Discharges

Subdivisions

Sanitation in Subdivisions Statute
Nondegradation
Subdivision Application and Review
Subdivision Requirements
Subdivision Waivers and Exclusions
On-Site Subsurface Wastewater Treatment Systems Rules
Stormwater

Water Quality Classification and Standards

Water Quality Standards
Mixing Zones in Surface and Groundwater
Nondegradation
Nutrient Variance
Short Term Standards for Turbidity

Wastewater

Wastewater System and Operators
Water Pollution Control State Revolving Fund

Clean Water & Safe Drinking Water Acts

Federal Clean Water and Safe Drinking Water Acts
Montana Water Quality Act

Water Quality Assessment

Classification and Standards
Monitoring-Water Quality Assessment Listing
Development and Implementation of TMDL

About Us

The Montana Department of Environmental Quality is charged with protecting a clean and healthy environment as guaranteed to our citizens by our State Constitution. Our ultimate goal is to protect public health and to maintain Montana's high quality of life for current and future generations.

Latest News

DEQ releases draft Environmental Impact...

Driscoll, Paul / Friday, March 22, 2019 0 137

30-day public comment period begins March 22

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