Yegua-Jackson Aquiferinteractive map | cross-section
Aquifer Facts
- Aquifer type: unconfined
- Area of aquifer: 10,932 square miles
- Proportion of aquifer with groundwater conservation districts: 62 percent
- Number of counties containing the aquifer: 34
Summary
The Yegua-Jackson Aquifer is a minor aquifer stretching across the southeast part of the state. It includes water-bearing parts of the Yegua Formation (part of the upper Claiborne Group) and the Jackson Group (comprising the Whitsett, Manning, Wellborn, and Caddell formations). These geologic units consist of interbedded sand, silt, and clay layers originally deposited as fluvial and deltaic sediments. Freshwater saturated thickness averages about 170 feet.
Water quality varies greatly owing to sediment composition in the aquifer formations, and in all areas the aquifer becomes highly mineralized with depth. Most groundwater is produced from the sand units of the aquifer, where the water is fresh and ranges from less than 50 to 1,000 milligrams per liter of total dissolved solids. Some slightly to moderately saline water, with concentrations of total dissolved solids ranging from 1,000 to 10,000 milligrams per liter, also occurs in the aquifer. There is low probability for maximum contaminant level exceedances in the aquifer. However, the southern part of the aquifer tends to have moderate levels of total dissolved solids, iron, and manganese exceedances.
Groundwater for domestic and livestock purposes is available from shallow wells over most of the aquifer's extent. Water is also used for some municipal, industrial, and irrigation purposes.
Reports
| ID | Date | Type | Description |
|---|---|---|---|
| Texas Aquifers Study | 12/31/2016 | Legislative Report | Texas Aquifers Study: Groundwater Quantity, Quality, Flow, and Contributions to Surface Water |
| R-365 | 2/1/2006 | TWDB numbered report | Aquifers of the Gulf Coast of Texas |
| R-316 | 1/1/1990 | TWDB numbered report | Evaluation of the Ground-Water Resources in the Lower Rio Grande Valley, Texas |
| R-236 | 7/1/1979 | TWDB numbered report | Stratigraphic and Hydrogeologic Framework of Part of the Coastal Plain of Texas |
| B-5209 | 12/1/1952 | Groundwater bulletin | Ground-Water Resources of Starr County, Texas |
| B-6520 | 8/1/1965 | Groundwater bulletin | Ground-Water Resources of La Salle and McMullen Counties, Texas |
| B-6310 | 12/1/1973 | Groundwater bulletin | Reconnaissance Investigation of the Ground-Water Resources of the Brazos River Basin, Texas |
| R-186 | 9/1/1974 | TWDB numbered report | Ground-Water Resources of Grimes County, Texas |
| R-185 | 9/1/1974 | TWDB numbered report | Ground-Water Resources of Brazos and Burleson Counties, Texas |
| R-074 | 5/1/1968 | TWDB numbered report | Ground-Water Resources of Tyler County, Texas |
| B-5710 | 7/1/1957 | Groundwater bulletin | Ground-Water Geology of Wilson County, Texas |
| R-004 | 11/1/1965 | TWDB numbered report | Ground-Water Resources of Gonzales County, Texas |
| R-020 | 3/1/1966 | TWDB numbered report | Ground-Water Resources of Lee County, Texas |
| R-018 | 3/1/1966 | TWDB numbered report | Ground-Water Resources of Houston County, Texas |
| R-037 | 1/1/1967 | TWDB numbered report | Ground-Water Resources of Sabine and San Augustine Counties, Texas |
| R-110 | 3/1/1970 | TWDB numbered report | Ground-Water Conditions in Angelina and Nacogdoches Counties, Texas |
| R-032 | 12/1/1966 | TWDB numbered report | Ground-Water Resources of Atascosa and Frio Counties, Texas |
| R-056 | 8/1/1967 | TWDB numbered report | Availability and Quality of Ground Water in Fayette County, Texas |
| GR11-001_MP | 6/15/2011 | GAM run - Management Plan | Management plan information for Duval County GCD |
| GR10-029_MP | 1/4/2011 | GAM run - Management Plan | Management plan information for Post Oak Savannah GCD |
| GT10-009 | 9/3/2010 | GAM task | Predictive simulations for the Carrizo-Wilcox, Queen City, Sparta, and Yegua-Jackson aquifers in Groundwater Management Area 11 |
| GR10-025 | 9/9/2010 | GAM run | Additional information on the estimated drawdown of the Yegua-Jackson Aquifer in Groundwater Management Area 14 |
| GR10-024_MP | 8/18/2010 | GAM run - Management Plan | Management plan information for Wintergarden GCD |
| GT10-012 | 9/9/2010 | GAM task | Predictive simulations for the Yegua-Jackson Aquifer |
| GR10-015_MP | 6/15/2010 | GAM run - Management Plan | Management plan information for Evergreen UWCD |
| GR10-014_MP | 6/9/2010 | GAM run - Management Plan | Management plan information for Lost Pines GCD |
| GR10-013_MP | 10/4/2011 | GAM run - Management Plan | Management plan information for Brazos Valley GCD |
| GR10-010_MP | 7/1/2010 | GAM run - Management Plan | Management plan information for Live Oak UWCD |
| GR10-005_MP | 8/23/2010 | GAM run - Management Plan | Management plan information for Brush Country GCD |
| GR11-019_MP | 1/31/2012 | GAM run - Management Plan | Southeast Texas GCD Management Plan |
| GR10-011_MP | 6/16/2010 | GAM run - Management Plan | Management plan information for Starr County GCD |
| GR12-011_MP | 6/25/2012 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR12-013_MP | 7/20/2012 | GAM run - Management Plan | Management plan data for Brush Country GCD |
| R-380 | 7/1/2011 | TWDB numbered report | Aquifers of Texas |
| GR13-002_MP | 3/21/2013 | GAM run - Management Plan | Management plan data for Fayette County GCD |
| GR12-025_TERS | 3/28/2013 | GAM run - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 16 |
| GR13-014_MP | 6/25/2013 | GAM run - Management Plan | Management Plan data for Gonzales County UWCD |
| GR13-003_MP | 7/26/2013 | GAM run - Management Plan | Management Plan Data for Pineywoods GCD |
| GR13-024_MP | 8/28/2013 | GAM run - Management Plan | Management plan data for Mid-East Texas GCD |
| GR13-028_MP | 8/30/2013 | GAM run - Management Plan | Management plan data for Bluebonnet GCD |
| GT13-036_TERS_Ver2 | 7/15/2013 | GAM task - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 13 |
| GT13-038_TERS | 1/15/2014 | GAM task - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 15 |
| GR14-005_MP | 3/26/2014 | GAM run - Management Plan | Management Plan data for Brazos Valley GCD |
| GT13-034_TERS | 4/2/2014 | GAM task - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 11 |
| GR14-006_MP | 4/1/2014 | GAM run - Management Plan | Management Plan data for Lower Trinity GCD |
| GT13-035_TERS_Ver2 | 5/16/2014 | GAM task - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 12 |
| GT13-037_TERS | 6/9/2014 | GAM task - Total Estimated Recoverable Storage | Total Estimated Recoverable Storage for aquifers in Groundwater Management Area 14 |
| GR14-014_MP | 12/12/2014 | GAM run - Management Plan | Management Plan data for Live Oak UWCD |
| GR15-004_MP | 6/30/2015 | GAM run - Management Plan | Management Plan data for Evergreen UWCD |
| GR15-007_MP | 7/29/2015 | GAM run - Management Plan | Management Plan data for Wintergarden GCD |
| GR16-012_MP | 10/31/2016 | GAM run - Management Plan | Management Plan Information for Southeast Texas GCD |
| GR16-011_MP | 10/31/2016 | GAM run - Management Plan | Management Plan Information for Duval County GCD |
| GR16-014_MP | 3/17/2017 | GAM run - Management Plan | Management plan information for Lost Pines GCD |
| GR17-001_MP | 10/5/2017 | GAM run - Management Plan | Management plan information for Brush Country GCD |
| GR17-011_MP | 11/20/2017 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR17-020_MP | 12/15/2017 | GAM run - Management Plan | Management plan information for Bluebonnet GCD |
| GR17-021_MP | 1/3/2018 | GAM run - Management Plan | Management plan information for Pineywoods GCD |
| GR17-019_MP | 2/2/2018 | GAM run - Management Plan | Management plan information for Fayette County GCD |
| GR18-006_MP | 4/9/2018 | GAM run - Management Plan | Management plan information for Gonzales County UWCD |
| GR18-019_MP | 7/6/2018 | GAM run - Management Plan | Management plan information for Brazos Valley GCD |
| GR18-021_MP | 1/25/2019 | GAM run - Management Plan | Management plan information for Brazos Valley GCD |
| GR18-020_MP | 2/11/2019 | GAM run - Management Plan | Management plan information for Mid-East Texas GCD |
| GR19-003_MP | 6/27/2019 | GAM run - Management Plan | Management plan information for Lower Trinity GCD |
| GR19-019_MP | 9/5/2019 | GAM run - Management Plan | Management plan information for Live Oak UWCD |
| GR18-016_MP | 10/24/2019 | GAM run - Management Plan | Management plan information for Starr County GCD |
| GR20-004_MP | 9/30/2020 | GAM run - Management Plan | Management plan information for Wintergarden GCD |
| GR22-002_MP | 3/10/2022 | GAM run - Management Plan | Management plan information for Southeast Texas GCD |
| GR22-007_MP | 6/28/2022 | GAM run - Management Plan | Management plan information for Post Oak Savannah GCD |
| GR22-008_MP | 8/12/2022 | GAM run - Management Plan | Management plan information for Lost Pines GCD |
| GR23-003_MP | 5/17/2023 | GAM run - Management Plan | Management plan information for Pineywoods GCD |
| GR23-009_MP | 6/2/2023 | GAM run - Management Plan | Management plan information for Brazos Valley GCD |
| GR23-005_MP | 06/09/2023 | GAM run - Management Plan | Management plan information for Bluebonnet GCD |
| GR23-008_MP | 06/12/2023 | GAM run - Management Plan | Management plan information for Fayette County GCD |
| GR23-015_MP | 07/28/2023 | GAM run - Management Plan | Management plan information for McMullen GCD |
| GR23-018_MP | 10/09/2023 | GAM run - Management Plan | Management plan information for Gonzales County UWCD |
| GR24-001_MP | 03/19/2024 | GAM run - Management Plan | Management plan information for Mid-East Texas GCD |