Botetourt County's groundwater contains arsenic, chloride, and bacteria, but none of these contaminants exceed EPA health standards. Contaminant levels in this county are low overall, so well owners should not be alarmed.
Arsenic occurs naturally in the rock layers beneath the county and leaches into groundwater over time. Chloride can come from road salt or natural mineral deposits. Bacteria sometimes enters wells through cracks or poor construction rather than from the rock itself. The carbonate rock that makes up the aquifer here is relatively stable and does not contribute these contaminants in dangerous amounts.
Groundwater in this county is hard, driven by calcium and magnesium dissolved from the limestone that forms the bedrock. As water seeps through the carbonate rock, it dissolves these minerals and carries them into wells. Hard water is the normal characteristic across most wells in Botetourt County.
Botetourt County wells do not have analytes exceeding EPA health standards. However, arsenic, chloride, and E. coli bacteria appear in some wells in the county at levels below regulatory limits. Arsenic exposure over time can increase the risk of cancer and damage organs like the kidneys and heart. Chloride at elevated levels can affect people with certain health conditions. E. coli bacteria indicates contamination and poses serious illness risks if consumed.
Wells in this county tend to be hard, which means you may notice white scale buildup on faucets and fixtures or inside pipes. Hard water makes soap less effective for cleaning and bathing. The mineral deposits can also shorten the lifespan of water heaters and dishwashers. You might find cleaning your home requires more effort or that laundry feels stiff even after washing.
Every well is different, and your well may have higher or lower levels of these contaminants 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. We recommend a comprehensive metals and minerals panel plus bacteria testing, which typically costs between two hundred and four hundred dollars. Treatment options like filtration systems or chlorination can address these concerns once you know your water's specific composition.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Chloride | 5 | 0% | Low | Low ⓘ | |
| Arsenic | 3 | 0% | Low | Low ⓘ | |
| Iron | 5 | 0% | Low | Low ⓘ | |
| Lead | 3 | 0% | Low | Safe ⓘ | |
| Nitrate | 2 | 0% | Low | Low ⓘ | |
| Radon | 3 | 0% | Low | Low ⓘ | |
| Sulfate | 5 | 0% | Low | Low ⓘ | |
| Fluoride | 5 | 0% | Low | Low ⓘ | |
| Manganese | 3 | 0% | Low | Safe ⓘ | |
| Uranium | 3 | 0% | Low | Low ⓘ | |
| Sodium | 5 | — | Low | Low ⓘ | |
| pH | 5 | — | 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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