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Total Maximum Daily Load (TMDL) Projects Map Viewer

This interactive map shows TMDL projects, addendum watersheds, and Implementation Plans (I-Plans), with optional layers for monitoring sites, assessment units, counties, regions, and legislative districts. (A TMDL determines how much of a pollutant a water body can receive and still meet water quality standards.)

  • User Guide - This downloadable PDF document explains how to use the tools available in the Viewer.
  • About the data - For more details about this data and the Viewer, please visit the TMDL Projects Item Details page in ArcGIS Online.
  • Access and Use Constraints - This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. It does not represent an on-the-ground survey and represents only the approximate relative location of property boundaries.
    Presently, all GIS related applications have a statewide exemption from 1 TAC 213 granted by the Department of Info Resources . If you require special assistance, please consult the Esri Software - Voluntary Product Accessibility Templates (VPATs) for ArcGIS Online applications.
  • Contact Us - Email TMDL staff at TMDL@tceq.texas.gov or talk with staff at 512-239-6642.