| Variable | Source |
| Aquifer Name | TWDB |
| Latitude for the well location | TWDB |
| Longitude for the well location | TWDB |
| Sample Month | TWDB |
| Sample Day | TWDB |
| Sample Year | TWDB |
| County Name | TWDB |
| Chloride (mg/L) | TWDB |
| Well Depth (ft) | TWDB |
| Groundwater withdrawals | USGS |
| Sea level trends | NOAA |