Wells in Salem draw water from limestone rock, and three contaminants show up in groundwater here: iron, arsenic, and chloride. Iron is the only one reaching levels that exceed EPA health standards, which is a concern that needs attention.
Iron and arsenic come from the limestone and other rock layers underground in this area. As water sits in these rocks for years, it slowly dissolves iron minerals naturally present in the stone. Arsenic and chloride also occur naturally in some rock layers here and leach into groundwater over time.
Groundwater in this county is hard, driven by calcium and magnesium that dissolve out of the limestone bedrock as water moves through it. The limestone that makes up the aquifer releases these minerals steadily into the water. Hard water is extremely common across wells throughout Salem because nearly all the groundwater sits in contact with limestone for long periods before reaching wells.
Wells in Salem city often contain iron at levels that exceed EPA health standards. Iron in drinking water can cause health problems over time, including damage to organs and tissues with repeated exposure at elevated amounts.
Hard water is common in this county's wells, which can leave stains on fixtures, dishes, and laundry. You might notice scale buildup in pipes and water heaters, and appliances like dishwashers and water heaters can wear out faster with hard water. The water may have a metallic taste or smell.
We recommend testing your well to find out exactly what is in your water, since every well is different and yours could have higher or lower levels than what is common here. A basic screening costs about fifty to one hundred dollars. Treatment options like iron filters or water softeners can address these concerns once you know your specific levels.
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 ⓘ |
|---|---|---|---|---|---|
| Iron | 3 | 33% | 67% · 0% · 33% | Low | High ⓘ |
| Chloride | 5 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Sulfate | 4 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Fluoride | 2 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Manganese | 6 | 0% | 83% · 17% · 0% | Low | Low ⓘ |
| Uranium | 1 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Lead | 2 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Arsenic | 3 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| pH | 9 | — | — | Low | Low ⓘ |
| Nitrate | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Sodium | 4 | — | — | Low | Low ⓘ |
| Nitrite | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Hardness | 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.
Data shows potential risk — a certified test confirms whether your water is affected.
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