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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 - 03/30/2023 | 7/3/2023 | |
| Bays and Estuaries | [24] | Download Access | Download Text | 01/05/1998 - 03/27/2023 | 7/5/2023 |
| Brazos-Colorado Coastal Basin | [13] | Download Access | Download Text | 01/08/1998 - 01/25/2023 | 7/3/2023 |
| Gulf of Mexico | [25] | Download Access | Download Text | 01/29/1998 - 02/13/2023 | 7/3/2023 |
| San Jacinto River Basin | [10] | Download Access | Download Text | 01/27/1998 - 03/01/2023 | 7/3/2023 |
| San Jacinto/Brazos Coastal Basin | [11] | Download Access | Download Text | 01/28/1998 - 03/23/2023 | 7/3/2023 |
| Trinity River Basin | [8] | Download Access | Download Text | 01/13/1998 - 03/30/2023 | 7/3/2023 |
| Trinity-San Jacinto Coastal Basin | [9] | Download Access | Download Text | 03/12/1998 - 01/31/2023 | 7/3/2023 |
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 - 10/25/2022 | 7/3/2023 |
| City of Houston Drinking Water Operations | [HW] | Download Access | Download Text | 01/12/2000 - 12/28/2022 | 7/3/2023 |
| Harris County Department of Pollution Control Services | [HC] | Download Access | Download Text | 06/24/1999 - 12/15/2022 | 7/3/2023 |
| Houston-Galveston Area Council | [HG] | Download Access | Download Text | 10/01/2007 - 10/13/2022 | 7/3/2023 |
| San Jacinto River Authority | [SJRA] | Download Access | Download Text | 05/04/1999 - 12/28/2022 | 7/3/2023 |
| Texas Commission on Environmental Quality | [FO] | Download Access | Download Text | 01/08/1998 - 03/30/2023 | 7/3/2023 |
| Texas Research Institute for Environmental Studies | [TF] | Download Access | Download Text | 12/20/2016 - 10/12/2022 | 7/3/2023 |
| University of Houston Clear Lake, EIH | [UI] | Download Access | Download Text | 02/02/2002 - 12/12/2022 | 7/3/2023 |
| US Geological Survey | [GS] | Download Access | Download Text | 05/13/1998 - 01/26/2022 | 7/3/2023 |
| City of Houston Public Works & Engineering and Harris County Flood Control District | [HP] - inactive | Download Access | Download Text | 01/28/1999 - 08/27/2013 | 07/18/2022 |
| City of Pearland | [PL] - inactive | Download Access | Download Text | 02/25/2004 - 04/23/2008 | 07/18/2022 |
| Galveston County Health District | [GC]- inactive - | Download Access | Download Text | 01/06/1999 - 08/21/2003 | 07/18/2022 |