Collin County Storm Water Program

Program Background

Polluted storm water runoff from urbanized areas is a major cause of pollution. In Texas, The Texas Commission on Environmental Quality (TCEQ) is responsible for implementing Clean Water Act regulations. The regulations that affect Collin County are commonly called the Phase II Storm Water Program. Under the Phase II Program, the TCEQ has identified six general categories of pollution control measures, which should be included in a community's Storm Water Management Program. The six categories of storm water quality controls are as follows:

  1. Public Education, Outreach, and Involvement
  2. Illicit Discharge Detection and Elimination (IDDE)
  3. Construction Site Storm Water Runoff Control
  4. Post-Construction Storm Water Management in New Development and Redevelopment
  5. Pollution Prevention/Good Housekeeping for County Operations
  6. Industrial Stormwater Sources
  7. Authorization for Municipal Construction Activites (Optional)

For each category, a series of Best Management Practices (BMPs) were selected for implementation in the County.  BMPs were selected by a County-specific stakeholder group with a vested interest in the quality of water in our communities.  Interaction between County staff and the stakeholder group led to the selection of 37 different BMPs to prevent stormwater pollution and improve the quality of water in our lakes and streams.

Common pollutants include sediment from eroded soil, oils and greases from leaking vehicles, bacteria from sewage or improperly operated septic systems and pet waste, trash and debris, and chemicals from fertilizers and pesticides.

The objective of the Collin County Storm Water Management Program (SWMP) is to implement a program to reduce the discharge of pollutants in stormwater. This program was developed with much coordination between the County and community to customize a program for Collin County that not only meets state and federal program requirements but also utilizes current activities, addresses issues that are important to the community, and is economically feasible.

A schedule to implement the Storm Water Management Program, as well as measurable goals to track the implementation progress, has been developed for each of the BMPs in the SWMP. Please refer to the Collin County Storm Water Management Program for more information.

The first permit term ran until Nov. 10, 2012, and the second permit term expired on Dec. 13, 2018. We are currently in our third permit term. This permit is good until 2023. Copies of the County’s annual reports, for the current permit term, can be found below. Past permit term reports can be requested by contacting the Collin County Engineering department at 972-548-3733. 

Year Reporting Cycle Annual Report Due Date Report Links
Term 3 Year 1 01/01/2019 – 12/31/2019 3/31/2020 Collin County 2019 Annual Report_03.13.2020.pdf
Term 3 Year 2 01/01/2020 – 12/31/2020 3/31/2021
Term 3 Year 3 01/01/2021 – 12/31/2021 3/31/2022
Term 3 Year 4 01/01/2022 – 12/31/2022 3/31/2023
Term 3 Year 5 01/01/2023 – 12/31/2023 3/13/2024
Stream Clean Up Events

If you are interested in participating in a Stream Clean Up project, please contact Tracy Homfeld at 972-548-3733 or


Spilling, dumping, or discharging chemicals, dirt, debris, oil or other non-stormwater substances into ditches, creeks, streams, curb drains, storm drains, or the river is a violation of federal, state, and local regulations. Allowing sediment or chemicals to wash off a construction site is also a violation. If you have witnessed an act that you feel is a violation of clean water regulations, anywhere within the county, please report the activity to the Collin County Engineering Department at 972-548-3733 or send an email to

If calling after regular Collin County business hours (M-F, 8 a.m. to 5 p.m.) and the problem requires immediate attention, please call the North Central Texas Region Illegal Dumping  24-hour hotline at 1-888-335-DUMP or call 911. 

Used Oil Recycling

Recycling your used oil helps the environment, saves energy and protects our drinking water. To find a collection center near you, please go to

Links & Resources

Collin County TPDES Small MS4 General Permit
EPA National Pollutant Discharge Elimination System (NPDES)
NCTCOG Wet Weather Monitoring
Public Works Recycling Centers
Illegal Dumping
TCEQ Storm Water Permits
Construction Activities Storm Water Brochure
The Dirty Dozen – Tips to Prevent Storm Water Pollution
Preventing Storm Water Pollution at Construction Sites Brochure