Chloride, fluoride, and hardness are present in Douglas County groundwater, but contaminant levels here are low and none exceed EPA health standards.
The crystalline rocks beneath Douglas County--granite and metamorphic stone--naturally release small amounts of these minerals into water as it flows through fractures and cracks. The bedrock geology and the absence of significant industrial or salt-spreading activities keep contamination levels minimal across the county.
Groundwater in this county is soft, with low concentrations of the calcium and magnesium that would make water hard. The crystalline bedrock does not dissolve easily, so minerals accumulate slowly in the water. This soft-water character is common across wells throughout Douglas County.
Good news: county wells in Douglas County show no analytes exceeding EPA health standards for drinking water. This means the common contaminants found in groundwater here are not known to cause serious health problems at the levels typically present in the county.
Wells in this county have very soft water, which is actually beneficial. You won't experience the stubborn staining, scale buildup, or appliance damage that comes with hard water. Your pipes, fixtures, and water heaters should stay cleaner longer, and soap will work more effectively in your home.
Still, we recommend testing your individual well because every well is different and your water could have higher levels of concern than what is common in the county. Testing is the only way to know what is actually in your well so you can treat it properly if needed. A basic screening runs fifty to one hundred dollars and can check for bacteria and other concerns. If you find contaminants, treatment options like carbon filters or other systems can address specific issues.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Fluoride | 2 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Fluoride | 2 | 0% | Low | Low ⓘ | |
| Nitrate | 2 | 0% | Low | Low ⓘ | |
| PFNA ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Hardness | 2 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 4 | — | Low | Safe ⓘ | |
| pH | 2 | — | Low | Low ⓘ | |
| Sodium | 2 | — | 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.
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