Groundwater in Suffolk contains iron, chloride, radon, fluoride, and sulfate at levels that exceed EPA health standards. Several of these contaminants--chloride, fluoride, iron, and radon--are present at concentrations high enough to warrant your attention.
Saltwater intrusion from the Atlantic Ocean and old seawater trapped in deep sediment layers is the primary source of chloride in this region. Iron occurs naturally as the sandy and clay layers of the Northern Atlantic Coastal Plain aquifer system weather and break down. Radon enters from radioactive elements in the surrounding rock and soil. These contaminants are part of the aquifer's geology and chemistry across this area.
Groundwater in Suffolk is notable for elevated sodium and moderate iron content. The sandy and clay sediments here contain naturally occurring sodium and iron minerals that dissolve into water as it moves through the ground. These characteristics are widespread across wells throughout the county.
Wells in Suffolk city contain chloride, fluoride, iron, radon, and sulfate at levels above EPA health standards. Chloride and fluoride in drinking water raise concerns about kidney function and bone health. Radon is a radioactive gas that enters through groundwater and increases lung cancer risk when breathed indoors. Iron at elevated levels can affect organ function over time. Sulfate exposure through drinking water poses digestive and developmental risks.
Iron in county wells causes reddish or brownish staining on sinks, toilets, and laundry. The water often has a metallic taste and unpleasant odor. High sodium levels add to water hardness and can leave scale buildup on fixtures and inside pipes, shortening the lifespan of water heaters and dishwashers.
Testing is the only way to know what contaminants are actually in your well and at what levels. Since multiple analytes exceed EPA standards here, a comprehensive metals and minerals panel is recommended to get a complete picture of your water quality. Testing costs between $200 and $400. Water softeners can help with hardness, and activated carbon filters or ion exchange systems can reduce chloride and other dissolved solids.
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 | 18 | 41% | 50% · 11% · 39% | Moderate | High |
| Chloride | 80 | 39% | 55% · 6% · 39% | Moderate | High |
| Radon | 15 | 33% | 27% · 40% · 33% | Moderate | High ⓘ |
| Fluoride | 27 | 27% | 52% · 22% · 26% | Moderate | High |
| Sulfate | 89 | 16% | 81% · 3% · 16% | Moderate | High |
| Uranium | 18 | 0% | 100% · 0% · 0% | Moderate | Low |
| Lead | 6 | 0% | 100% · 0% · 0% | Low | Low ⓘ |
| Arsenic | 20 | 0% | 95% · 5% · 0% | Moderate | Low |
| Sodium | 83 | — | — | Moderate | Low |
| pH | 18 | — | — | Moderate | Low |
| Total Coliform | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| E. coli | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Nitrite | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Hardness | 1 | — | — | Low | Safe ⓘ |
| Nitrate | 1 | 0% | 100% · 0% · 0% | Low | Safe ⓘ |
| Manganese | 1 | 0% | 100% · 0% · 0% | 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.
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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