Skip to main content

Social toolbar

  • Follow us on Twitter
  • Watch videos on YouTube
  • View photos on Flickr
  • Connect with us on LinkedIn
  • Email us
  • View Instagram

Utility Bar

  • Online Services and GIS
  • Find an Agency
  • Governor Kehoe
  • MO.gov
Home

Google Translate

  • Air

    Megamenu Main Nav

    • Browse Air
    • How’s the Air
    • Data and e-Services
    • Gateway Vehicle Inspection
    • Business and Industry
    • Financial Assistance Opportunities
    • What We’re Doing
    • Get Involved
    Volkswagen Trust Fund logo

    Volkswagen Trust Funds

    Vehicle/ engine replacement program to reduce nitrogen dioxide emissions

    Need a Permit?

    Learn more about Missouri’s air permits and how to apply

    Gateway Vehicle Inspection Program logo

    Gateway Vehicle Inspection Program

    Emissions inspection testing in the St. Louis region

    Asbestos

    Demolition, renovation, abatement projects and notifications

    Popular Services

    • Find a GVIP Testing Location
    • Open Burning
    • Current Air Quality
    • Air Emissions & Reporting
    • Disaster Resources
    • Commissions, Boards, Councils
    • Forums and Stakeholder Groups
    • Public Notices
    • Report an Environmental Concern
  • Waste and Recycling

    Megamenu Main Nav

    • Browse Waste and Recycling
    • Sites and Regulated Facilities
    • Investigations and Cleanups
    • Long-Term Stewardship (LTS)
    • Data and e-Services
    • Business and Industry
    • Reduce, Reuse and Recycle
    • Financial Assistance Opportunities
    • What We’re Doing
    • Get Involved
    Brownfields property with several dilapidated buildings and weed-covered open spaces

    E-Start: Hazardous Waste Map

    Search our interactive map of hazardous waste facilities, site investigations and cleanups

    Need a Permit, License or Registration?

    Learn more about Missouri’s hazardous and solid waste permits and how to apply

    A hand throwing away paper in a green trashcan

    Solid Waste Management Map

    Search our interactive map of scrap tire processing facilities and solid waste landfills and processing facilities

    What To Do With Specific Waste

    Learn how or where to get rid of specific waste

    Popular Services

    • Environmental Emergency Response
    • Hazardous and Infectious Waste Transporters
    • Shipping Radioactive Materials
    • Household Hazardous Waste Collection Facilities
    • Solid Waste Management Districts
    • Disaster Resources
    • Commissions, Boards, Councils
    • Forums and Stakeholder Groups
    • Public Notices
    • Report an Environmental Concern
  • Water

    Megamenu Main Nav

    • Browse Water
    • How’s the Water
    • Alerts or Water Hazards
    • Data and e-Services
    • Business, Industry and Other Entities
    • Soil and Water Conservation
    • Financial Assistance Opportunities
    • What We’re Doing
    • Get Involved
    Aerial view of a wastewater treatment facility

    Operator Certification

    Training and information for drinking water and wastewater system operators

    Need a Permit or Certification?

    Learn more about Missouri’s water permits and how to apply

    A young girl in a blue and purple shirt drinking water from a water fountain

    The Water We Drink

    Learn more about the quality of Missouri’s drinking water

    Water Monitoring and Data

    Learn more about the health of Missouri’s groundwater, rivers, lakes and streams

    Popular Services

    • Beach Status
    • Boil Orders and Advisories
    • Harmful Algal Blooms
    • Reporting
    • Wells and Drilling
    • Disaster Resources
    • Commissions, Boards, Councils
    • Forums and Stakeholder Groups
    • Public Notices
    • Report an Environmental Concern
  • Land and Geology

    Megamenu Main Nav

    • Browse Land and Geology
    • Geology
    • Maps, Data and Research
    • Geologic Hazards
    • Dams and Reservoirs
    • Mining and Land Reclamation
    • Soil and Water Conservation
    • Businesses, Landowners and Permittees
    • Financial Assistance Opportunities
    • What We’re Doing
    • Get Involved
    Aerial view of several cropland fields separated by tree rows

    Soil and Water Cost-Share Practices

    Install conservation practices to conserve soil and improve water quality

    Need a Permit?

    Learn more about Missouri’s land and geology permits and how to apply

    An individual sitting at a computer monitor viewing an electronic map

    GeoSTRAT

    Explore our interactive tool for locating springs, mines, sinkholes and more

    MGS ArcGIS Hub

    Find interactive maps, GIS spatial data and geographic content provided by the Missouri Geological Survey

    Popular Services

    • Soil and Water Conservation Districts
    • Wells and Drilling
    • Ask a Geologist
    • Ed Clark Museum of Geology
    • Missouri Geology Bibliography
    • Disaster Resources
    • Commissions, Boards, Councils
    • Forums and Stakeholder Groups
    • Public Notices
    • Report an Environmental Concern
  • Energy

    Megamenu Main Nav

    • Browse Energy
    • Energy Resources
    • Energy Information
    • Energy Efficiency
    • Business and Industry
    • Residential and Community
    • Transportation
    • Weatherization
    • Financial Assistance Opportunities
    • What We’re Doing
    • Get Involved
    A man installs weatherization around a window in an attic

    Weatherization

    Energy-efficient improvements for Missouri’s low income households

    Missouri Home Energy Certification

    How you can benefit from Home Energy Certification

    Red and gold colored home

    Home Energy Efficiency

    How you can make your home more energy efficient and save money

    Energy Financial Assistance Opportunities

    Learn more about our various low-interest loans, grants and reimbursement programs for energy efficiency projects

    Popular Services

    • State Energy Plan
    • Solar Energy
    • Local Weatherization Agencies
    • Green Building Registry®
    • Carpool and Rideshare
    • Disaster Resources
    • Commissions, Boards, Councils
    • Forums and Stakeholder Groups
    • Public Notices
  • State Parks

    Megamenu Main Nav

    • Browse Missouri State Parks
    • Historic Preservation Office
    • State Park Rangers
    • Things to Do
    • Upcoming Events
    • Beach Status
    • Natural Areas
    • Wild Areas
    • Financial Assistance Opportunities
    • Get Involved
    An individual canoeing at Bennett Springs State Park

    Find Your Park

    Searching for a Missouri state park or historic site has never been easier

    Online Store

    Gift cards, apparel - bring a piece of MoStateParks into your everyday life

    A family eating a meal in front of a sleeping cabin at a Missouri State Park

    Make a Reservation

    Cabins, lodge, campgrounds or yurts, let’s get your adventure started

    Upcoming Events

    We host hundreds of special events throughout the year - find an event near you

    Popular Services

    • Campers: Check In
    • Park/ Site Status
    • Blue Star Museums Program
    • 'Learn 2' Programs
    • Passport Program
    • Rock Island Line Corridor
    • Support Your State Parks
    • Parks, Soils & Water Sales Tax
  • Agency/ General

    Megamenu Main Nav

    • Browse Agency/ General
    • About Us
    • Commissions, Boards, Councils
    • Communications
    • Compliance Assistance & Enforcement
    • Fees
    • Forms and Applications
    • Get Involved
    • Laws, Rules and Regulations
    • Monitoring
    • Publications and Fact Sheets
    • Reporting
    • Success Stories
    • What We're Doing
    An individual sitting at a desk, data stamping an application form

    Permits, Certifications, Registrations and Licenses

    Learn more about Missouri's environmental permits and how to apply

    Financial Assistance Opportunities

    Learn more about our grants and low interest loans

    A department employee standing at the front of a conference room discussing issues with various stakeholders

    Public Notices/ Public Comments

    Search permits, rules and actions on public notice and provide your input

    Forum or Stakeholder Groups

    Discuss specific environmental issues with department staff through forums, workgroups, committees and advisory groups

    Popular Services

    • Calendar
    • Careers
    • Contaminant Spotlight
    • Data and e-Services
    • Disaster Resources
    • Document Search
    • Get Email Updates
    • Missouri DNR Photo Contest
    • Missouri Resources
    • Professional Certifications and Training
    • Open Records/ Sunshine Law Requests
    • Report an Environmental Concern
    • Sites of Interest
    • Video Broadcasts

MoDNR extends waivers from specific statutes and administrative rules following the March 14, 2025, severe weather and tornado events

Phase 2 Small Municipal Separate Storm Sewer Systems

File

Document Information

Permit Number
MO-R040000
Effective Date
10/01/2021
Expiration Date
09/30/2026
Description

SIC/ NAICS #924110

Discharges from regulated Phase 2 Small Municipal Separate Storm Sewer Systems.

For more information, visit Municipal Separate Storm Sewer Systems (MS4).

  • Phase Small Municipal Separate Storm Sewer Systems Master General Permit Reissuance Public Meeting, June 4, 2025

MoDNR

  • About Us
  • Careers
  • Communications
  • Commissions, Boards, Councils
  • Contact Us
  • Forums and Stakeholder Groups

DO BUSINESS

  • Compliance Assistance
  • Certifications and Trainings
  • Financial Assistance Opportunities
  • Laws, Rules and Regulations
  • Permits, Registrations and Licenses
  • Reporting

GET LOCAL INFORMATION

  • Air Quality
  • Beach Status - State Parks
  • Boil Water Orders
  • Drinking Water Watch
  • Katy Trail Advisory Map
  • State Park and Historic Sites Status

GET INFORMED

  • Calendar
  • Public Notices/ Public Comment Periods
  • Document Search
  • Data and e-Services
  • Get Email Updates
  • Open Records/ Sunshine Law Requests

TAKE ACTION

  • Comment on Proposed Rules
  • Report an Environmental Concern/ Submit a Question
  • Report Website Issues/ Suggest Improvements
  • Request an Audit/ Report an Audit Concern
  • Submit Public Comments

Governor
Mike Kehoe

MO.gov State of Missouri

Click here to Save a Life

Director
Kurt U. Schaefer

Footer menu

  • Accessibility
  • ADA and Non-discrimination
  • Data Policy
  • Privacy Policy

The Missouri Department of Natural Resources does not endorse, make claims or promises, or provide warranties of accuracy, of any websites or related materials provided outside of this website. The department bears no responsibility for any damages arising from using these websites or related materials.

Please Read this Disclaimer Carefully Before Using the Service

The Missouri Department of Natural Resources' (the "Department") website can be translated into many different languages using Google™ Translate, a third-party service that provides automated computer translations of webpages. The Google™ Translate Service is offered as a convenience and is subject to applicable Google Terms of Service. Providing the service as a convenience is not an endorsement of the product or the results generated, and nothing herein should be construed as such an approval or endorsement.

The content of the Department's website originates in English. If there are differences between the English content and its translation, the English content is always the most accurate. By selecting a language from the Google Translate menu, the user accepts the legal implications of any misinterpretations or differences in the translation.

As Google's translation is an automated service it may display interpretations that are an approximation of the website's original content. You should not rely on Google™ Translate to provide an exact translation of the website. There are circumstances where the service does not translate correctly or where translations may not be possible, such as with certain file types (PDF, text and MS Excel documents), video content, and images containing text. In addition, some applications or services may not work as expected when translated.

The Department has no control over the nature, content, and availability of the service, and accordingly, cannot guarantee the accuracy, reliability, or timeliness of the translation. Neither the Department nor its employees accept liability for any inaccuracies or errors in the translation or liability for any loss, damage, or other problem, including without limitation, indirect or consequential loss or damage arising from or in connection with using the Google™ Translate Service.

For assistance, please contact the Department of Natural Resources at 573-751-3443 or by email at dnrwebcontact@dnr.mo.gov. If you are having accessibility or usability issues with our website, please fill out an Accessibility Issue form.

Department of Natural Resources

Address:
1101 Riverside Drive
PO Box 176
Jefferson City, MO 65102-0176
United States
Telephone: 573-751-3443
Toll-free: 800-361-4827
Email: dnrwebcontact@dnr.mo.gov