Surface Water Monitoring Data

Sampling Data Definition

The TCEQ monitors the quality of surface water to evaluate physical, chemical, and biological characteristics of aquatic systems with reference to human health concerns, ecological condition, and designated uses. Data provide a basis for effective policies that promote the protection, restoration, and wise use of surface water in Texas.

TCEQ Sampling Data Query, Surface Water Quality Monitoring

Access Water Quality Data

Use H-GAC's Water Resources Information Map (WRIM) to locate Regional Monitoring Stations and access Water Quality Data.

Download TCEQ Quality Assured Datasets

Datasets on this page contain TCEQ Quality Assured ZIP data files for the seven assessment basins that intersect the H-GAC Region. Data can be downloaded as an MS Access Database or as a text file.

Surface Water Monitoring Data by Basin

H-GAC updates the datasets occasionally throughout the year. If data prior to January 1, 1998 is needed, please reach out. For field descriptions and data reformatting instructions, please see Data Field Descriptions and Use.

Basin Code Access DB Text File Date Range Updated
All H-GAC Region Data   Download Access Download Text 01/05/1998 - 05/10/2022 7/18/2022
Bays and Estuaries [24] Download Access Download Text 01/05/1998 - 05/04/2022 7/18/2022
Brazos-Colorado Coastal Basin [13] Download Access Download Text 01/08/1998 - 10/21/2021 7/18/2022
Gulf of Mexico [25] Download Access Download Text 01/29/1998 - 02/08/2022 7/18/2022
San Jacinto River Basin [10] Download Access Download Text 01/27/1998 - 11/16/2021 7/18/2022
San Jacinto/Brazos Coastal Basin [11] Download Access Download Text 01/28/1998 - 11/17/2021 7/18/2022
Trinity River Basin [8] Download Access Download Text 01/13/1998 - 05/10/2022 7/18/2022
Trinity-San Jacinto Coastal Basin [9] Download Access Download Text 03/12/1998 - 09/01/2021 7/18/2022

Surface Water Monitoring Data by Organization

Organization Code Access DB Text File Date Range Updated
City of Houston Health Department [HH] Download Access Download Text 03/01/1999 - 11/19/2020 7/18/2022
City of Houston Drinking Water Operations [HW] Download Access Download Text 01/12/2000 - 12/22/2020 7/18/2022
Harris County Department of Pollution Control Services  [HC] Download Access Download Text 06/24/1999 - 08/25/2020 7/18/2022
Houston-Galveston Area Council [HG] Download Access Download Text 10/01/2007 - 05/13/2021 7/18/2022
San Jacinto River Authority [SJRA] Download Access Download Text 05/04/1999 - 12/16/2020 7/18/2022
Texas Commission on Environmental Quality [FO] Download Access Download Text 01/08/1998 - 05/10/2022 7/18/2022
Texas Research Institute for Environmental Studies [TF] Download Access Download Text 12/20/2016 - 04/08/2021 7/18/2022
University of Houston Clear Lake, EIH [UI] Download Access Download Text 02/02/2002 - 05/21/2021 7/18/2022
US Geological Survey [GS] Download Access Download Text 05/13/1998 - 06/08/2015 7/18/2022
City of Houston Public Works & Engineering and Harris County Flood Control District [HP] - inactive Download Access Download Text 01/28/1999 - 08/27/2013 7/18/2022
City of Pearland [PL] - inactive Download Access Download Text 02/25/2004 - 04/23/2008 7/18/2022
Galveston County Health District [GC]- inactive - Download Access Download Text 01/06/1999 - 08/21/2003 7/18/2022