Groundwater in Essex County contains manganese, chloride, and iron at levels that exceed EPA health standards. These contaminants are present at concentrations that well owners should know about and monitor.
The limestone bedrock beneath Essex County naturally releases iron and manganese as water moves through it over time. Chloride enters from road salt applied during winter months, which seeps down into the groundwater system. Both sources are widespread across the region because of the carbonate rock geology and the road network throughout the county.
The water in this county is soft, with moderate amounts of iron present. Iron comes from minerals naturally found in the limestone rock, and as groundwater sits in contact with these rocks, the iron dissolves into the water. Elevated iron levels are common across wells throughout Essex County.
Wells in Essex County show elevated levels of chloride, iron, manganese, and radon that exceed EPA health standards. Radon is a radioactive gas that enters through bedrock and can increase lung cancer risk with long-term exposure. Chloride at high levels can be harmful to people with heart disease or high blood pressure. Iron and manganese can affect organs and body systems over time.
The iron in county wells can leave rust-colored staining on fixtures, laundry, and dishes. You might notice a metallic or bitter taste in your water. Since the water here is soft, you won't experience scale buildup or the short appliance lifespans that come with very hard water.
We recommend testing your well with a comprehensive panel that checks for metals, minerals, and radon since multiple contaminants exceed health standards. Testing costs between $200 and $400 and is the only way to know what is actually in your well. Every well is different, and your water could have higher or lower levels than what is common in the county. Once you know what you're dealing with, treatment options like filtration systems and radon aeration can address your specific concerns.
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 ⓘ |
|---|---|---|---|---|---|
| Chloride | 302 | 24% | High | High | |
| Radon | 42 | 17% | Moderate | High ⓘ | |
| Iron | 76 | 14% | Moderate | Moderate | |
| Manganese | 76 | 8% | Moderate | Moderate | |
| Arsenic | 62 | 2% | Moderate | Low | |
| Fluoride | 76 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 20 | 0% | Moderate | Safe | |
| Lead | 62 | 0% | Moderate | Low | |
| Nitrate | 89 | 0% | Moderate | Low | |
| Nitrite | 62 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 20 | 0% | Moderate | Safe | |
| PFNA ⓘ municipal | 20 | 0% | Moderate | Safe | |
| PFOA ⓘ municipal | 20 | 0% | Moderate | Safe | |
| PFOS ⓘ municipal | 20 | 0% | Moderate | Safe | |
| Sulfate | 303 | 0% | High | Low | |
| Uranium | 42 | 0% | Moderate | Low | |
| Total Coliform | 16* | 0% | Moderate | Low | |
| Sodium | 296 | — | High | Low | |
| pH | 314 | — | High | Low | |
| PFBS ⓘ municipal | 20 | — | Moderate | Safe | |
| Hardness | 303 | — | High | Low | |
| Fecal Coliform | 16* | 0% | Moderate | Low | |
| E. coli | 16* | 0% | Moderate | 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.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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