Groundwater in Cochran County contains arsenic, chloride, fluoride, iron, manganese, sulfate, and uranium that well owners should monitor. Several of these contaminants exceed EPA health standards and need attention.
The rock layers beneath this county naturally release arsenic, uranium, and manganese into the water as it moves through the underground gravel and sand. Sulfate and chloride build up in the aquifer from the same rock formations and from salts that concentrate in dry climates where water doesn't flush them away quickly.
Groundwater in Cochran County is very hard, driven by elevated calcium and magnesium combined with very high sulfate and high sodium. The sandy and rocky layers of the High Plains aquifer release these minerals as water flows through, and the dry climate concentrates them further by limiting natural flushing. These mineral characteristics are widespread across wells throughout the county.
Wells in Cochran County commonly exceed EPA health standards for arsenic, uranium, fluoride, and chloride. Arsenic and uranium can damage your kidneys and increase cancer risk over time. Fluoride at these levels can cause dental fluorosis, which damages tooth enamel. Chloride at elevated concentrations raises health concerns, especially for people with high blood pressure or heart conditions.
The county's water is extremely hard, which causes white scale buildup on fixtures and in pipes. You may see rust stains from iron on sinks and laundry. The high sulfate content creates a bitter or salty taste in the water. Very hard water shortens the lifespan of water heaters, dishwashers, and other appliances because scale clogs and damages them.
Since multiple contaminants exceed health standards, we recommend a comprehensive metals and minerals panel to understand what is actually in your well--costs run between $200 and $400. Your well may have higher or lower levels than what is common in the county, and testing is the only way to know. Water softeners and reverse osmosis systems are treatment options that can address these concerns once you know your specific water composition.
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 ⓘ |
|---|---|---|---|---|---|
| Sulfate | 5 | 60% | Low | High ⓘ | |
| Chloride | 5 | 40% | Low | High ⓘ | |
| Arsenic | 105 | 16% | High | High | |
| Manganese | 106 | 13% | High | Moderate | |
| Fluoride | 227 | 13% | High | Moderate | |
| Uranium | 36 | 3% | Moderate | Low | |
| Iron | 119 | 3% | High | Low | |
| Lead | 105 | 0% | High | Low | |
| Nitrate | 18 | 0% | Moderate | Low | |
| Nitrite | 6 | 0% | Low | Low ⓘ | |
| Radon | 2 | 0% | Low | Low ⓘ | |
| Sodium | 5 | — | Low | Low ⓘ | |
| pH | 6 | — | Low | Low ⓘ | |
| Hardness | 5 | — | Low | 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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