Well water in Kinney County, Texas
In Kinney County, none of 34 tested well samples exceeded the EPA limit for fluoride, based on public data from Texas Water Development Board Groundwater Database and USGS Water Quality Portal.
47 individual samples from 28 wells, 1937 to 2023. Data refreshed September 9, 2026.
TWDB samples an ambient monitoring network of wells on a rotation, so these describe aquifers, not a survey of homeowners' tests.
What individual samples found
Each row summarizes every public sample for that contaminant inside Kinney County. Above limit means above the EPA maximum contaminant level; where EPA has no enforceable limit, the row shows a health guideline or nuisance level instead.
| Contaminant | Samples | Detected | Above limit | Median | Highest | Limit | |
|---|---|---|---|---|---|---|---|
| Fluoride 1938 to 2023 | 34 | 94% | 0% | 0.175 | 2.39 | 4 mg/L EPA limit | |
| Lead 1993 to 2023 | 14 | 14% | 0% | 0 | 3 | 15 ug/L EPA limit | |
| Arsenic 1993 to 2023 | 13 | 0% | 0% | 0 | 0 | 10 ug/L EPA limit | |
| Nitrate 1993 to 2023 | 13 | 100% | 0% | 1.87 | 6.39 | 10 mg/L EPA limit | |
| Copper 1993 to 2023 | 13 | 54% | 0% | 0.002 | 0.006 | 1.3 mg/L EPA limit | |
| Chloride 1937 to 2023 | 47 | 100% | no limit | 11 | 151 | 250 mg/L nuisance level | |
| Sodium 1938 to 2023 | 38 | 100% | no limit | 6.35 | 29 | 20 mg/L health guideline | |
| Manganese 1993 to 2023 | 13 | 15% | no limit | 0 | 16.7 | 300 ug/L health guideline | |
| Iron 1993 to 2023 | 13 | 15% | no limit | 0 | 318 | 300 ug/L nuisance level |
Sampled fewer than 10 times, too few to summarize: Uranium (7), Radium (226 + 228) (4), Gross alpha (4), E. coli (1), Radon (3).
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What this means
Among contaminants with a federal limit, no tested sample in Kinney County came back above it. That is reassuring, but sampling is uneven: wells that were never tested are not in this data.
Chloride is widespread in local groundwater. It is mainly a staining and taste problem, but high manganese also carries a health advisory for infants.
What to test for in Kinney County
- Volatile organic compounds (VOCs)8 leaking underground storage tank sites on record locally.
- Coliform bacteriaRecommended for every private well, every year.
- RadonMedian local reading is 400 pCi/L.
- ChlorideDetected in 100% of local samples.
- NitrateRecommended for every private well, especially near farms or septic systems.
- FluorideDetected in 94% of local samples.
- CopperDetected in 54% of local samples.
Contamination sources on record in Kinney County
TCEQ records 8 leaking underground storage tank sites in Kinney County, among 14 regulated sites in total. Groundwater does not follow property lines, so a well within a few hundred feet of one of these is worth testing for what that site could release.
- 8
- leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 6
- lined landfills and transfer facilities
Treatment that fits the local profile
- Fluoride
- Point-of-use reverse osmosis; Activated alumina; Distillation
- Copper
- Neutralizing filter to raise pH; Point-of-use reverse osmosis
- Chloride
- Point-of-use reverse osmosis; Distillation
Get your Kinney County water tested at home
A licensed local water treatment company tests your tap water in your home, walks you through the numbers, and quotes treatment only if something needs fixing. Free, about 30 minutes, no obligation. Tell us what you need and we match you with a company that serves Kinney County.
Common questions
Is there arsenic in well water in Kinney County?
Arsenic was detected in 0% of 13 public well samples in Kinney County, and 0% were above the EPA limit of 10 ug/L. Arsenic has no taste or smell; a lab test is the only way to know your level.
How high is radon in well water in Kinney County?
The median radon level across 3 public samples in Kinney County was 400 pCi/L, with a high of 540 pCi/L. New Hampshire recommends treatment above 2,000 pCi/L.
How often should I test a private well in Kinney County?
Test for bacteria and nitrate every year. Test once for arsenic, uranium, radon, fluoride, manganese and PFAS, then again every three to five years or after any change in taste, color, or plumbing.
Sources
- Texas Water Development Board Groundwater Database: 205 samples in Kinney County. Water quality samples from the Texas Water Development Board Groundwater Database, collected by TWDB, groundwater conservation districts and cooperators. Retrieved September 9, 2026.
- USGS Water Quality Portal: 12 samples in Kinney County. Data from the Water Quality Portal, a service of USGS, EPA and USDA; groundwater samples collected by USGS and cooperators. Retrieved September 3, 2026.
- TCEQ regulated sites: 14 regulated sites located in Kinney County. Leaking petroleum storage tank sites, state Superfund sites and municipal solid waste landfills from the Texas Commission on Environmental Quality. Retrieved September 9, 2026.
Non-detects count as samples and are treated as zero when computing medians. Exactly at the limit counts as not above it. A sample belongs to the town containing the well's reported coordinates.