Groundwater in Addison County contains arsenic, chloride, fluoride, iron, lead, manganese, nitrate, and uranium at levels that exceed EPA health standards. These contaminant levels are concerning enough that well owners should test their water and consider treatment options.
The limestone bedrock beneath Addison County naturally releases some of these metals and minerals into groundwater as water moves slowly through cracks and spaces in the rock. Lead and uranium can also come from old plumbing materials and naturally occurring deposits in the stone. Nitrate enters from agricultural and septic sources common in rural areas. Chloride comes from road salt applied during winter months.
Groundwater in this county is very hard, driven by elevated calcium and magnesium from the limestone below. As water filters through carbonate rock, it dissolves these minerals and carries them into wells. Very hard water is common across wells throughout Addison County.
Wells in Addison County show levels of arsenic, chloride, fluoride, lead, uranium, and nitrate that exceed EPA health standards. Arsenic exposure over time can increase cancer risk and damage organs like the kidneys and nervous system. Lead is especially harmful to children's brain development and can cause learning problems. Uranium, nitrate, and fluoride at elevated levels also pose health concerns with prolonged exposure. Chloride and other contaminants add to the overall water quality picture in this area.
The county's well water is very hard, which creates visible problems around the home. Hard water leaves chalky buildup on faucets, showerheads, and fixtures. It can reduce how well soap and shampoo work and leave a sticky feeling on skin. Very hard water also shortens the lifespan of water heaters, dishwashers, and washing machines because scale clogs the inside parts.
We recommend having your well tested right away since multiple contaminants exceed health standards in this county. Your well's water may have higher or lower levels than what is common here--testing is the only way to know what is actually in your water and how to treat it. A comprehensive metals and minerals panel costs between $200 and $400 and will tell you exactly what you're dealing with. Treatment options like reverse osmosis or activated carbon filters can address many of these concerns once you know your specific results.
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 | 866 | 17% | High | High | |
| Manganese | 982 | 15% | High | Moderate | |
| Lead | 3297 | 6% | High | Moderate | |
| Chloride | 1621 | 4% | High |
Moderate
Elevated concentration, not % above limit
|
|
| Arsenic | 1835 | 2% | High | Low | |
| Uranium | 1733 | 1% | High | Low | |
| Nitrate | 2023 | 1% | High | Low | |
| Fluoride | 1835 | 0% | High | Low | |
| HFPO-DA (GenX) ⓘ municipal | 14 | 0% | Low | Safe | |
| Nitrite | 1965 | 0% | High | Low | |
| PFHxS ⓘ municipal | 14 | 0% | Low | Safe | |
| PFNA ⓘ municipal | 14 | 0% | Low | Safe | |
| PFOA ⓘ municipal | 14 | 0% | Low | Safe | |
| PFOS ⓘ municipal | 14 | 0% | Low | Safe | |
| Radon | 22 | 0% | Moderate | Low ⓘ | |
| Sulfate | 58 | 0% | Moderate | Low | |
| Sodium | 860 | — | High | Low | |
| pH | 549 | — | High | Low | |
| PFBS ⓘ municipal | 14 | — | Low | Safe | |
| Hardness | 739 | — | High | 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.
Order a Tap Score Test →Population-level CDC data. Not individual risk prediction.
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