Assistance Tools for Municipal Separate Storm Sewer Systems (MS4s)
Resources for small businesses and local governments regarding municipal separate storm sewer systems (MS4s).
Municipal separate storm sewer systems (MS4s) consist of a conveyance or system of conveyances, including roads with drainage systems, streets, catch basins, curbs, gutters, ditches, human-made channels, or storm drains. The following resources are provided to assist the regulated community in meeting permit requirements.
Resources for MS4s
- Issued TXR040000 Permit for Phase II (Small) MS4s
- Storm Water Permitting Requirements for Phase II (Small) MS4s
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Municipal Separate Storm Sewer System Model Ordinance
- Texas Integrated Report of Surface Water Quality - Review the current Index of All Impaired Waters to determine if the water body receiving your stormwater discharges is impaired and identify the pollutant. Make sure to select the most recent report approved by the TCEQ and EPA.
- For permitting purposes, Category 4 and 5 represent the list of impaired waterways. Only a portion of impaired waters have an established TMDL.
- Segments with Total Maximum Daily Loads (TMDL)
Back to topMaps for Stormwater Permitting
- Urbanized Area Maps
- Surface Water Quality (Segments) Viewer - View stream segments and water bodies monitored by TCEQ with this interactive map viewer.
- You can select a particular segment or water body to see more information like segment name, ID number, description, and impairment status.
Forms for MS4s
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Notice of Intent (NOI) for Stormwater Discharges from Phase II (Small) MS4s (TCEQ Form 20368)
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Waiver for Stormwater Discharges from Phase II (Small) MS4s (TCEQ Form 20369)
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Phase II (Small) MS4 Annual Report Form 2019 (TCEQ Form 20561)
Stormwater Programs
- Grant Program for Managing Nonpoint Source Water Pollution
- Texas Watershed Steward
- Texas Coastal Watershed Program
EPA Stormwater Resources
The following links take you off the TCEQ website. If you encounter an inactive (broken) link, please send an e-mail to TexasEnviroHelp@tceq.texas.gov and indicate which link was broken.
- EPA in Texas
- Evaluating the Effectiveness of Municipal Stormwater Programs
- Menu of Best Management Practices
- Model Ordinances
- Nonpoint Source Outreach Toolbox
- Oil and Gas Stormwater Permitting
- Search Publications
- Smart Growth - Tools and Resources for Sustainable Communities
- Soak Up the Rain Outreach
- Stormwater Discharges from Municipal Sources
- Stormwater Training Webcasts
Phase I MS4s in Texas
The following links take you off the TCEQ website. If you encounter an inactive (broken) link, please send an e-mail to TexasEnviroHelp@tceq.texas.gov and indicate which link was broken.
- City of Abilene
- City of Arlington
- City of Austin
- City of Beaumont
- City of Corpus Christi
- City of Dallas
- City of El Paso
- City of Fort Worth
- City of Garland
- City of Houston & Harris County
- City of Irving
- City of Laredo
- City of Lubbock
- City of Plano
- City of Waco
More Help
TCEQ's Small Business and Local Government Assistance section offers free, confidential help to small businesses and local governments working to follow state environmental regulations. Call us at (800) 447-2827 or visit our webpage at TexasEnviroHelp.org.