MS4: Municipal Separate Storm Sewer Systems
The State of Texas routinely monitors receiving water quality and assesses receiving water conditions. The EPA (Environmental Protection Agency) delegated regulatory authority of small MS4's to TCEQ (Texas Commission on Environmental Quality). TCEQ is responsible for issuing permits to discharge waste pollutants in stormwater runoff from small MS4 systems to waters of the state.
The Town of Little Elm is an operator of a Phase II MS4 (small MS4) located north of Lewisville in Denton County, approximately 14 miles from Lewisville and 25 miles from Denton, north of The Colony and west of Frisco. The Town surrounds the northeast area of Lewisville Lake. The Town is 19.70 square miles in area and has a population of approximately 25,898 as of 2010.
EPA and TCEQ regulations require that all small MS4 operators located in urban areas must "develop, implement and enforce a Stormwater Management Program (SWMP) designed to reduce the discharge of pollutants from the MS4 to the maximum extent practicable, to protect water quality..."
Please share your knowledge and help educate your community! Need a learning tool for kids? Watch "Freddy the Fish Teaches about Stormwater" or visit NCTCOG (North Central Texas Council on Governments) website for more educational resources.
- Lewisville Lake
- Cottonwood Branch
- Elm Fork Trinity River
- Panther Creek
- Doe Branch
- Little Elm Creek
- Pecan Creek
- Gutter, inlet, and creek debris cleanouts
- Infrastructure improvements to mitigate flooding and erosion
- Other drainage and water quality oriented services
- Street sweeping
- Water quality protection
How can you help?
Always place trash and waste in a covered trash bin. Pick up after your pet(s.) Ensure your vehicle is not leaking fluids. Report illegal dumping, and Never EVER pour anything into a storm drain or onto a paved surface such as a parking lot. Remember, Only Rain in the Drain.
- protection of marshes, swamps and aquatic ecosystems
- improved quality of receiving lakes and reservoirs
- water resource conservation
- improvement to public health and safety
- improved flood control