Groundwater in Alleghany County contains manganese, sulfate, and chloride at levels that exceed EPA health standards. These contaminants are present at concentrations the EPA considers concerning enough to regulate.
The carbonate rock under this county naturally contains these minerals and salts. As water moves through the limestone and similar rocks below ground, it dissolves manganese, sulfate, and chloride and carries them into wells. In some areas, road salt and other human activities can add extra chloride to groundwater, making the problem worse.
Groundwater in this county is soft, with low iron and low sulfate. The carbonate rocks here release calcium and magnesium in small amounts, which is why hardness stays low. These soft-water characteristics are common across wells in the county, but wells vary in how much manganese and chloride they pick up depending on their location and depth.
Wells in Alleghany County sometimes have chloride, manganese, and sulfate at levels above EPA health standards. Manganese can affect the nervous system, especially in children, and cause learning and behavior problems with long-term exposure. Chloride and sulfate at high levels can cause stomach upset and other digestive issues. Your county's well water may or may not contain these contaminants at concerning levels.
The good news is that wells in this county are generally soft and low in iron and sodium, so you probably won't see rust stains, scale buildup, or salty taste from minerals. Water heaters and dishwashers should last a normal amount of time. However, some wells do pick up unpleasant tastes or odors from the sulfate and other minerals in the area.
We recommend testing your well to find out what is actually in your water, since every well is different and yours could have higher or lower levels than the county average. A comprehensive panel that checks for metals and minerals runs between $200 and $400. Testing is the only way to know if your water needs treatment like a manganese filter or water softener.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Radon | 1 | 0% | Low | Low ⓘ | |
| Nitrate | 2 | 0% | Low | Low ⓘ | |
| Iron | 1 | 0% | Low | Safe ⓘ | |
| Fluoride | 5 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Lead | 1 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Arsenic | 1 | 0% | Low | Safe ⓘ | |
| Chloride | 5 | 0% | Low | Low ⓘ | |
| Manganese | 1 | 0% | Low | Safe ⓘ | |
| Nitrite | 2 | 0% | Low | Low ⓘ | |
| PFOS ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Hardness | 3 | — | Low | Low ⓘ | |
| Sodium | 3 | — | Low | Low ⓘ | |
| pH | 1 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 4 | — | Low | Safe ⓘ |
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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