Groundwater in Salem has traces of chloride, fecal coliform, and fluoride. None of these contaminants exceed EPA health standards, so contamination levels here are low.
Chloride and fecal coliform can enter groundwater through road salt and septic systems or animal waste in the soil. The carbonate limestone bedrock in this area is naturally fractured, which can allow contamination to move through the rock more easily than in other settings. Fluoride occurs naturally in the water as it flows through the rock.
Groundwater in Salem is moderately hard, driven by calcium and magnesium dissolved from the limestone aquifer below. Water moving through carbonate rock slowly dissolves the stone and picks up these minerals. Moderate hardness is the common condition across wells in this area.
The good news is that county well water in Salem does not show analytes exceeding EPA health standards. However, fecal coliform and chloride are contaminants of concern that show up in some wells here. Fecal coliform indicates bacterial contamination from sewage or animal waste and can cause serious digestive illness. Chloride at elevated levels can be a problem for people on sodium-restricted diets and can damage plumbing and septic systems over time.
Wells in this county tend to have moderately hard water. Hard water leaves scale buildup on fixtures and inside pipes. You may notice soap doesn't lather well, and dishes or glassware can spot after washing. Over many years, very hard water can shorten the life of water heaters and dishwashers because of mineral deposits inside them.
Your well is unique, so testing is recommended to see what is actually in your water. A basic screening for bacteria and nitrate costs around fifty to one hundred dollars. If results show concerns, a more complete metals and minerals panel runs two hundred to four hundred dollars. Water softeners and chloride filters are treatment options that work well for these issues.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Chloride | 1 | 0% | Low | Low ⓘ | |
| Fluoride | 1 | 0% | Low | Low ⓘ | |
| Iron | 1 | 0% | Low | Safe ⓘ | |
| Nitrate | 1 | 0% | Low | Low ⓘ | |
| Nitrite | 1 | 0% | Low | Safe ⓘ | |
| Sulfate | 1 | 0% | Low | Low ⓘ | |
| Hardness | 1 | — | Low | Low ⓘ | |
| pH | 1 | — | Low | Low ⓘ | |
| Sodium | 1 | — | 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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