Well water in Irion County, Texas
In Irion County, none of 62 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.
106 individual samples from 48 wells, 1940 to 2024. 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 Irion 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 1966 to 2024 | 62 | 100% | 0% | 0.9 | 2.9 | 4 mg/L EPA limit | |
| Lead 1993 to 2024 | 11 | 18% | 0% | 0 | 3.01 | 15 ug/L EPA limit | |
| Nitrate 1993 to 2024 | 11 | 91% | 0% | 1.06 | 3.79 | 10 mg/L EPA limit | |
| Arsenic 1993 to 2024 | 11 | 27% | 0% | 0 | 3.3 | 10 ug/L EPA limit | |
| Copper 1993 to 2024 | 11 | 55% | 0% | 0.001 | 0.006 | 1.3 mg/L EPA limit | |
| Chloride 1940 to 2024 | 106 | 100% | no limit | 40.5 | 327 | 250 mg/L nuisance level | |
| Sodium 1940 to 2024 | 67 | 100% | no limit | 41 | 342 | 20 mg/L health guideline | |
| Manganese 1993 to 2024 | 11 | 36% | no limit | 0 | 19 | 300 ug/L health guideline | |
| Iron 1993 to 2024 | 11 | 64% | no limit | 6.5 | 173 | 300 ug/L nuisance level |
Sampled fewer than 10 times, too few to summarize: Gross alpha (4), Radium (226 + 228) (6), Uranium (5), E. coli (2), Radon (2).
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What this means
Among contaminants with a federal limit, no tested sample in Irion County came back above it. That is reassuring, but sampling is uneven: wells that were never tested are not in this data.
Chloride and Iron are widespread in local groundwater. They are mainly a staining and taste problem, but high manganese also carries a health advisory for infants.
What to test for in Irion County
- Volatile organic compounds (VOCs)1 leaking underground storage tank site on record locally.
- Coliform bacteriaRecommended for every private well, every year.
- RadonMedian local reading is 375 pCi/L.
- Gross alphaAbove the limit in 2 of 4 local samples; too few to quote a rate.
- Radium (226 + 228)Above the limit in 2 of 6 local samples; too few to quote a rate.
- FluorideDetected in 100% of local samples.
- ChlorideDetected in 100% of local samples.
- NitrateRecommended for every private well, especially near farms or septic systems.
Contamination sources on record in Irion County
TCEQ records 1 leaking underground storage tank site in Irion County, among 3 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.
- 1
- leaking underground storage tank siteGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 2
- 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
- Iron
- Oxidizing filter whole-house; Water softener (low levels); Aeration plus filtration
Get your Irion 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 Irion County.
Common questions
Is there arsenic in well water in Irion County?
Arsenic was detected in 27% of 11 public well samples in Irion 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 Irion County?
The median radon level across 2 public samples in Irion County was 375 pCi/L, with a high of 460 pCi/L. New Hampshire recommends treatment above 2,000 pCi/L.
How often should I test a private well in Irion 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: 310 samples in Irion 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: 10 samples in Irion 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: 3 regulated sites located in Irion 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.