Monroe County's groundwater sits in mixed older rock layers that hold water in small spaces and cracks. These rocks are not uniform like limestone or sandstone in neighboring areas. Water moves through them slowly and can pick up different minerals depending on the local geology.
High sulfate levels come from minerals naturally present in the rock itself. Arsenic and chloride appear because groundwater sits in contact with these rocks for long periods, dissolving trace amounts into the water. The area's geology does not provide strong natural protection like thick clay layers do elsewhere.
This water is extremely salty and full of minerals. The very high sodium and sulfate give the water a bitter or salty taste that makes it unpleasant to drink. Scale will build up quickly inside pipes and water heaters, causing expensive damage over time.
Arsenic exceeds EPA health standards in Monroe County well water. Chloride and sulfate are also found at levels that exceed EPA guidance. These three contaminants together create a moderate health concern that warrants testing your well right away.
Long-term exposure to arsenic can cause serious health problems over time. High chloride and sulfate levels can affect how your water tastes and may cause digestive issues with continued drinking. The water may also have a salty or bitter taste that affects everyday use.
Get your well tested by a state-certified lab as soon as possible. A basic health screen costs around fifty to one hundred dollars, while a comprehensive panel with metals testing runs two hundred to four hundred dollars. A reverse osmosis system under your kitchen sink can remove arsenic and reduce chloride.
| Contaminant | Samples ⓘ | % Above MCL ⓘ | Distribution ⓘ | Confidence ⓘ | Risk ⓘ |
|---|---|---|---|---|---|
| Sulfate | 27 | 27% | 52% · 22% · 26% | Moderate | High |
| Arsenic | 8 | 14% | 50% · 38% · 12% | Low | Moderate |
| Chloride | 57 | 4% | 86% · 10% · 4% | Moderate | Moderate |
| Nitrite | 36 | 0% | 100% · 0% · 0% | Moderate | Low |
| Fluoride | 21 | 0% | 95% · 5% · 0% | Moderate | Low |
| Uranium | 4 | 0% | 100% · 0% · 0% | Low | Low |
| Nitrate | 11 | — | — | Low | Low |
| Iron | 1 | 0% | 100% · 0% · 0% | Low | Safe |
| Manganese | 1 | 0% | 100% · 0% · 0% | Low | Safe |
| Sodium | 40 | — | — | Moderate | Low |
| Nitrate | 1 | 0% | 100% · 0% · 0% | Low | Safe |
| pH | 5 | — | — | Low | Low |
| Lead | 1 | 0% | 100% · 0% · 0% | Low | Safe |
| Fecal Coliform | 1 | — | — | Low | Safe |
| E. coli | 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.
Population-level CDC data. Not individual risk prediction.
Loading recent water news…