• Divisions
    • Director's Office
    • Enforcement
    • Centralized Services
    • Air, Energy & Mining
    • Water Quality
    • Waste Management & Remediation
  • CONTACTS
    • About Us
    • Affiliated Organizations
    • Contact Us
    • DEQ Staff Directory
    • DEQ Office Locations/Addresses
    • About Montana DEQ
      • Advisory Councils
      • Affiliated Organizations
      • Goal and Objectives
      • Organizational Structure
      • Our Mission
    • Board of Environmental Review
      • Board Authority
      • Board Policies
      • FAQs
      • Meeting Calender
      • Personnel Contacts
    • Director's Office
      • DEQ Business Processes
      • Goals and Objectives
      • Legal Unit
      • Organizational Chart
    • Environmental Links
      • EA: Environmental Assessments

      • EIS: Environmental Impact Statements

      • Major Facility Siting

      • Online Services

      • Today's Air
    • Permits
      • Air
      • Hazardous Waste
      • Mining
      • Solid Waste
      • Water Related
      • General Permits
    • Public Interest
      • DEQ Bids and Quotes
      • Legal and Public Notices
      • Press Releases
      • Public Comments
      • Public Meetings
      • Request Public Records

Drinking Water

  • Drinking Water Main Page
  • Understanding Your Drinking Water
  • Drinking Water Rules and Monitoring
  • Submit Water Sample Results
  • Source Water Assessment and Protection
  • Engineering and SRF
  • Circulars, Forms, Regs, SOPs
  • Compliance Inspections

Surface Water

  • Surface Water Main Page
  • Clean Water Act Information Center
  • Monitoring Water Quality
  • Nonpoint Source Pollution
  • Watershed Restoration Planning
  • Water Quality Standards
  • Wetlands
  • Total Maximum Daily Loads
  • Submit Water Quality Data

Permits

  • Permit Main Page
  • Apply For or Renew Permit Online (FACTS)
  • Surface Water Discharge (MPDES)
  • Groundwater Discharge (MGWPCS)
  • Stormwater
  • Inspections and Noncompliance
  • NetDMR
  • 401 Certification | 318 Authorization
  • Public Comment and Legal Notices

Subdivisions

  • Subdivision Main Page
  • Subdivision Review and Approval
  • Circulars, Forms, Regulations, SOPs
  • Stormwater Permits
  • Public Comment and Legal Notices

Operator Certification

  • Operator Certification Main Page
  • Public Notices and Rule Changes

Public Information

  • Public Information Main Page
  • Circulars, Forms, Regulations, SOPs
  • Advisory Councils and Stakeholders
  • Clean Water Act Information Center
  • Contracts and Grants
  • e-Services
  • Training
  • Public Comment, Legal Notices, and Public Meetings
  • Publications and Technical Reports

Forms, Circulars, Regs & SOPs

  • Circulars
  • Forms
  • Regulations
  • Standard Operating Procedures

Contacts

  • Water Division Contacts
  • Agency Directory

Drinking Water

COVID-19 Readiness:

  • General Public Water Supply Guidance - Updated 5/19/2020

  • Sustaining Operations of Drinking Water Systems

WaterFountain

Public Water Supply

Public Water Supply Acute Contaminant Maps

Source Water Assessment and Protection

Emergency, Safety, and Preparedness

Drinking Water Rules and Monitoring

Compliance Inspections

Engineering and State Revolving Fund

PFAS (Per- and Polyfluoroalkyl Substances)

Contacts

ToolsTile

Tools and Data

Public Water Supply Monitoring Schedule

Drinking Water Watch

CMDP-Report Your Drinking Water Data

Forms

Water Supply Planning Guide for Montana Municipalities

Municipal Source Water Vulnerability Assessment Tool

Municipal Water Use Calculation Tool

DrinkingFountainTile

Other Drinking Water Topics

What's in My Drinking Water?

Private Wells

Public Information Center

Lead Reduction in Schools Program

Manganese in Drinking Water

  •  

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 and Partners Continue Major Cleanup at the...

Stone, Kevin / Monday, April 12, 2021 0 349

Excavation of Asbestos Contaminated Soils to Occur in Late-April

Read more
RSS

Latest Tweets

Tweets by MTDEQ

Follow Us