Chloride in Texas well water
In Texas, chloride was detected in 100% of 24,914 tested private well samples.
Chloride mainly comes from road salt and water softener discharge. Above 250 mg/L water tastes salty and corrodes plumbing. Rising chloride in a well usually means road salt is reaching the aquifer.
Check your chloride number
Type the value from your lab report. It is compared to the EPA limit, the same way the full interpretation does it.
Getting it fixed
Book a free in-home water test with a licensed local company, or see the treatment guide for what removes chloride.
By county, from individual samples
Public monitoring samples against the EPA limit; counties with at least 30 samples.
| County | Samples | Detected | Above EPA limit | Median | Highest |
|---|---|---|---|---|---|
| Andrews | 50 | 100% | no limit | 276 | 910 mg/L |
| Anderson | 126 | 100% | no limit | 14 | 360 mg/L |
| Aransas | 36 | 100% | no limit | 285 | 3,330 mg/L |
| Archer | 196 | 100% | no limit | 263 | 2,588 mg/L |
| Angelina | 61 | 100% | no limit | 65 | 2,700 mg/L |
| Atascosa | 164 | 100% | no limit | 62 | 1,120 mg/L |
| Austin | 87 | 100% | no limit | 54.1 | 275 mg/L |
| Bandera | 132 | 100% | no limit | 23.4 | 76 mg/L |
| Bastrop | 143 | 100% | no limit | 68 | 1,560 mg/L |
| Baylor | 81 | 100% | no limit | 170 | 9,507 mg/L |
| Bee | 203 | 100% | no limit | 248 | 2,120 mg/L |
| Armstrong | 157 | 100% | no limit | 19 | 109 mg/L |
| Bexar | 187 | 100% | no limit | 16 | 1,100 mg/L |
| Blanco | 581 | 100% | no limit | 22 | 451 mg/L |
| Bosque | 65 | 100% | no limit | 18 | 215 mg/L |
- Lexington CCD, Lee County100% detected of 51
- San Antonio North CCD, Bexar County100% detected of 52
- Southeast Montgomery CCD, Montgomery County100% detected of 30
- San Antonio South CCD, Bexar County100% detected of 42
- LaBelle CCD, Jefferson County100% detected of 40
- Nome-China CCD, Jefferson County100% detected of 59
- San Antonio Northwest CCD, Bexar County100% detected of 55
- Winnsboro CCD, Wood County100% detected of 32
- Northeast Brazos CCD, Brazos County100% detected of 50
- South Brazos CCD, Brazos County100% detected of 32
- Big Lake CCD, Reagan County100% detected of 124
- Liberty-Dayton CCD, Liberty County100% detected of 39
- Kermit CCD, Winkler County100% detected of 49
- Cedar Park-Liberty Hill CCD, Williamson County100% detected of 61
- Florence CCD, Williamson County100% detected of 50
- Jarrell CCD, Williamson County100% detected of 64
- Round Rock-Georgetown CCD, Williamson County100% detected of 101
- Taylor CCD, Williamson County100% detected of 33
- Rankin CCD, Upton County100% detected of 68
- Corrigan CCD, Polk County100% detected of 45
Sources
- Individual samples from the USGS Water Quality Portal and state monitoring, summarized per geography. chloride counts and shares are listed on each county and town page with their sources.