Culberson County groundwater contains arsenic, chloride, fluoride, iron, lead, manganese, nitrate, and sulfate. Many of these contaminants exceed EPA health standards, making water testing and treatment important for well owners in this area.
The rock beneath this county naturally contains minerals and metals that dissolve into groundwater as water percolates down. Chloride and sulfate come from the rock itself. Arsenic, lead, and other metals are present in the underlying geology. Nitrate can enter from human activities like agriculture and septic systems in addition to natural sources.
Groundwater in Culberson County is very hard, driven by high levels of calcium and magnesium from the rock, along with elevated sodium and sulfate. The dry climate and the mineral-rich rock composition concentrate these dissolved materials as water moves slowly through the ground. These characteristics are widespread across wells throughout the county.
Wells in Culberson County commonly contain arsenic, lead, and nitrate at levels that exceed EPA health standards. Arsenic and lead are toxic metals that can build up in your body over time and harm your kidneys, nerves, and bones. Nitrate is especially dangerous for babies under six months old, as it can interfere with how their blood carries oxygen. Fluoride, manganese, and sulfate also exceed standards in county wells and pose health concerns with long-term exposure.
The water in this county is very hard, which creates practical problems for daily life. Hard water leaves scale buildup on pipes and fixtures that reduces water flow and shortens the lifespan of water heaters and dishwashers. Iron in the water causes rust stains on sinks, toilets, and laundry. The high sodium and sulfate content gives the water a bitter or salty taste that many people find unpleasant.
We recommend testing your well to find out exactly what is in your water. Your well is unique and could have higher or lower levels than what is common across the county. A comprehensive metals and minerals panel will tell you which contaminants are present so you can decide on treatment. Testing costs between $200 and $400 and is the only way to know what needs to be fixed. Reverse osmosis systems and water softeners can address many of these concerns.
Not sure if your well is affected? Get certified results in 5–7 days.
Test Your Well Water with Tap Score →| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Chloride | 16 | 25% | Moderate | High | |
| Sulfate | 16 | 25% | Moderate | High | |
| Iron | 189 | 13% | High | Moderate | |
| Nitrate | 37 | 11% | Moderate | Moderate | |
| Manganese | 183 | 9% | High | Moderate | |
| Arsenic | 145 | 3% | High | Low | |
| Fluoride | 491 | 1% | High | Low | |
| Lead | 144 | 1% | High | Low | |
| Uranium | 22 | 0% | Moderate | Low | |
| Sodium | 16 | — | Moderate | Low | |
| pH | 16 | — | Moderate | Low | |
| Hardness | 16 | — | Moderate | Low |
MCL = Maximum Contaminant Level (EPA limit for public water; used as benchmark for private wells). Distribution shows % of sampled wells in each concentration band. Methodology.
* Microbial contaminants (E. coli, coliform) reflect only samples from the last 10 years.
Data shows potential risk — a certified test confirms whether your water is affected.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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