Well water in Anderson County, Texas
In Anderson County, none of 126 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.
126 individual samples from 89 wells, 1940 to 2015. 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 Anderson 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 | |
|---|---|---|---|---|---|---|---|
| Nitrate 1993 to 2010 | 16 | 100% | 6% | 0.631 | 10.9 | 10 mg/L EPA limit | |
| Lead 1970 to 2010 | 17 | 29% | 6% | 0 | 40 | 15 ug/L EPA limit | |
| Fluoride 1940 to 2010 | 126 | 61% | 0% | 0.1 | 1.6 | 4 mg/L EPA limit | |
| Arsenic 1993 to 2010 | 16 | 13% | 0% | 0 | 1.2 | 10 ug/L EPA limit | |
| Copper 1993 to 2010 | 16 | 94% | 0% | 0.009 | 0.104 | 1.3 mg/L EPA limit | |
| Chloride 1940 to 2010 | 126 | 100% | no limit | 14 | 360 | 250 mg/L nuisance level | |
| Sodium 1940 to 2010 | 126 | 100% | no limit | 20 | 401 | 20 mg/L health guideline | |
| Iron 1940 to 2010 | 96 | 91% | no limit | 166 | 17,200 | 300 ug/L nuisance level | |
| Manganese 1993 to 2010 | 16 | 88% | no limit | 17.6 | 91 | 300 ug/L health guideline |
Sampled fewer than 10 times, too few to summarize: Gross alpha (6), Uranium (3), Radium (226 + 228) (2), E. coli (1), Radon (1).
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What this means
The contaminants most often above their limit here are nitrate (6% of 16 samples) and lead (6% of 17 samples). A well next door can differ sharply from yours because bedrock fractures, well depth and plumbing all matter, so these rates describe the area, not your tap.
Chloride, Iron, and Manganese 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 Anderson County
- Volatile organic compounds (VOCs)70 leaking underground storage tank sites on record locally.
- Metals panel1 hazardous waste site on record locally.
- Nitrate6% of 16 local samples were above the limit.
- Lead6% of 17 local samples were above the limit.
- Coliform bacteriaRecommended for every private well, every year.
- RadonMedian local reading is 242 pCi/L.
- ChlorideDetected in 100% of local samples.
- CopperDetected in 94% of local samples.
- IronDetected in 91% of local samples.
Contamination sources on record in Anderson County
TCEQ records 70 leaking underground storage tank sites and 1 hazardous waste site in Anderson County, among 86 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.
- 70
- leaking underground storage tank sitesGasoline and heating oil that leaked from tanks move through groundwater as benzene, MTBE and other volatile organic compounds.
- 1
- hazardous waste siteSolvents, degreasers and metals from industrial sites can travel far in fractured bedrock.
- 15
- lined landfills and transfer facilities
Treatment that fits the local profile
- Nitrate
- Point-of-use reverse osmosis; Anion exchange; Distillation
- Lead
- Point-of-use reverse osmosis; Certified lead-removal carbon filter; Neutralizing filter to raise pH and stop leaching
- 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 Anderson 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 Anderson County.
Common questions
Is there arsenic in well water in Anderson County?
Arsenic was detected in 13% of 16 public well samples in Anderson 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 Anderson County?
The median radon level across 1 public samples in Anderson County was 242 pCi/L, with a high of 242 pCi/L. New Hampshire recommends treatment above 2,000 pCi/L.
How often should I test a private well in Anderson 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: 563 samples in Anderson 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: 5 samples in Anderson 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: 86 regulated sites located in Anderson 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.