Total Maximum Daily Load

Total Maximum Daily Load and Impairment Programs

A total maximum daily load (TMDL) is like a budget for pollutants for impaired waterbodies. It estimates the amount of a pollutant that a water body can receive and still support its designated uses. Designated uses may include fishing, general use, and how the water supports aquatic life. The load is then allocated among the sources of pollution within the watershed, and measures to reduce pollutant loads are developed as necessary. Those measures are generally addressed within an Implementation Plan or I-Plan - which is formulated through a stakeholder driven effort to achieve improved water quality while giving stakeholders appropriate flexibility. A TMDL becomes part of the state's Water Quality Management Plan after it is adopted by the Texas Commission on Environmental Quality (TCEQ) and approved by the United States Environmental Protection Agency (EPA).

Q4 September 2018 Quarterly Newsletter

November 6,7, and 9, 2017 
North Texas Regional Feral Hog Conference

The North Texas Feral Hog Conference was a multi-agency collaboration to convene policymakers, stakeholders, and experts to discuss feral hog management at the watershed level. To better serve our communities, the event was held November 6, 7, and 9 at three locations in the North Central Texas region.

Conference Materials:





August 21, 2017 
Sanitary Sewer Overflow Initiative Benefits Webinar

Learn about the Sanitary Sewer Overflow Initiatives occuring in the North Texas area and how those initiatives have impacted the number of overflows over time. This webinar features Mary Gugliuzza, from the City of Fort Worth Water Department, and Scott Hoelzle, from the North Texas Municipal Water District.

View the webinar recording


North Texas Urban Feral Hog Forum

Thank you to all who joined the North Central Texas Council of Governments (NCTCOG) for the North Texas Urban Feral Hog Forum on May 1st, 2017 at Brookhaven College in Farmers Branch!

Feral hogs present increasing challenges to both rural and urban communities in North Texas. The large populations are not only destructive, causing property damage, infrastructure damage, and threats to public safety, but are also a source of bacteria loading in North Texas waterways through waste contributions and destabilization of riparian areas.

Presentations from the May 1, 2017 North Texas Urban Feral Hog Forum


Presentations from the December 16, 2015 NCTCOG SSO Workshop

Water Resources Planning and Management Workshops

2017 TMDL Program Highlights

Cities in the watershed continue to address bacteria levels in the impaired waterways covered by the Implementation Plan. Highlights from 2017 include:

  • Developed and distributed a TMDL Information Request. Collected information from TMDL area stakeholders about TMDL I-Plan efforts.
  • Attended public meetings in preparation for the inclusion of the Sycamore Creek watershed to the Greater Trinity I-Plan.
  • Completed the Greater Trinity River Region TMDL Implementation Plan Status Report. Incorporated data and information from the Four Total Maximum Daily Loads for Indicator Bacteria in the Cottonwood Creek, Fish Creek, Kirby Creek, and Crockett Branch Watershed Upstream of Mountain Creek into the current I-Plan.
  • Coordinated and facilitated the North Texas Urban Feral Hog Forum in May 2017, which engaged nearly 50 interested stakeholders.
  • Helped plan and promote the North Texas Feral Hog Conference in November 2017, led by our partner agency, Trinity River Authority, which created further progress on Strategy 4.0: Feral hog management.
  • Created a Texas Stream Team web page on the NCTCOG website including an overview of the program, contacts, and equipment information.
  • Coordinated and facilitated the Sanitary Sewer Overflow Initiative (SSOI) Benefits webinar on August 21, 2017. The webinar had 31 participants, with speakers including Mary Gugliuzza from the Fort Worth Department and Scott Hoelzle from the North Texas Municipal Water District.

2016 TMDL Program Highlights

Cities in the watershed continue to address bacteria levels in the impaired waterways covered by the Implementation Plan. Highlights from 2016 include:

  • Hosted two workshops aimed at educating municipal and community representatives on challenges related to bacteria impairment in the Greater Trinity Region. Both the Sanitary Sewer Overflow workshop and the Green Infrastructure and Low Impact Development workshop had over 60 attendees.
  • Developed a spatial database and map of sanitary sewer overflow density by zip code in the TMDL area since 2011.
  • Supported the Doo the Right Thing campaign, with over 150 individuals taking a pet waste pledge to help reduce bacteria-laden runoff reaching local waterways.
  • Completed administrative and technical edits to the Implementation Plan (I-Plan) that were reviewed and approved by the subcommittees and Coordination Committee.
  • Continued partnership with AgriLife Stephenville, engaging regional stakeholders to implement strategies to reduce bacteria in impaired segments of the Upper Trinity River Basin.
  • Engaged subcommittees to define priority levels and status updates for each strategy and corresponding sub-strategy in the 2016 I-Plan Strategies Matrix. This tool will be used by the subcommittees to determine progress for the I-Plan strategies in 2017.

2015 TMDL Program Highlights

Cities in the watersheds continue to address bacteria levels in the impaired waterways covered by the Implementation Plan. Highlights from 2015 include:

  • Created the Water Quality BMP Library as a resource for regional stakeholders. The Library contains over 100 resources and will continued to be updated with new resources.
  • The Bacteria TMDL Coordination Committee voted to add 4 impaired segments to the Implementation Plan. If approved by the TCEQ, the total segments covered by the Implementation Plan will total 21 segments.
  • Supported Doo the Right Thing Pet Calendar with over 100 individuals take a pet waste pledge to help reduce bacteria laden runoff reaching local waterways.
  • Partnered with AgriLife Stephenville to address bacterial impairments in basin 0805 and those impaired sub-segments of the Trinity River. The first year of this effort increased education and outreach to raise stakeholders' water quality awareness.
  • Developed an Implementation Plan strategies matrix for prioritizing strategies for FY2016.

2014 TMDL Program Highlights

Although the I-Plan was not formally adopted until December 2013, cities in the impaired watersheds had already begun to make progress on addressing bacteria levels in the impaired waterways.

  • Created the Monitoring Coordination Forum to provide real-time analysis of water monitoring for better feedback on best management practices (BMPs).
  • Reviewed existing Regional Stormwater Management Program Illicit Discharge Detection and Elimination materials to evaluate need to adapt for greater emphasis on bacteria.
  • Developed two age-appropriate stormwater education videos for students with bacteria-specific information included.
  • Adapted pet waste education promotional item, the annual DOO the Right Thing cutest dog calendar, to greater emphasize bacteria component in pet waste.
  • NCTCOG began seeking input into and development of Implementation Strategy 8.0 - the BMP Library (see I-Plan below).

I-Plan for Seventeen Total Maximum Daily Loads for Bacteria in the Greater Trinity River Region- adopted 12/11/2013