Cortland County groundwater contains radon, iron, chloride, and lead, with some wells showing levels above EPA health standards. Chloride and iron reach concerning concentrations, while radon and lead also warrant attention for well owners.
The limestone bedrock beneath Cortland County releases iron and contributes to chloride in the water as it dissolves slowly into the groundwater. Radon forms naturally in the rock and leaches into wells as water moves through fractures and spaces. Chloride can also enter from road salt and septic systems, which concentrate more in areas with shallow wells or dense development.
Cortland County groundwater is moderately hard, driven mainly by iron at moderate levels. The carbonate rock that sits beneath the county naturally dissolves minerals as water passes through it, allowing iron to enter the water. Moderate iron and moderate hardness are common across wells in this county, though individual well results vary.
Wells in Cortland County commonly show chloride, iron, lead, and radon at levels above EPA health standards. Lead damages children's brain and nervous system development even at low exposures. Radon is a radioactive gas that enters homes from the ground and increases lung cancer risk over time. Chloride and iron at elevated levels can affect your health depending on how much you drink over months and years.
Iron at moderate levels in county wells creates visible staining on dishes, laundry, and bathroom fixtures. You may notice rust-colored water or a metallic taste. Iron can also cause buildup inside pipes and reduce water flow over time. These mineral deposits wear down appliances like water heaters and dishwashers faster than normal.
We recommend testing your well with a comprehensive metals and radon panel so you know exactly what is in your water. Every well is different, and your well may have higher or lower levels than what is common in the county. A comprehensive panel typically costs two hundred to four hundred dollars. Treatment options like radon ventilation systems, iron filters, or water softeners can address specific problems once testing shows what you have.
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 ⓘ |
|---|---|---|---|---|---|
| Radon | 14 | 43% | Low | High ⓘ | |
| Manganese | 94 | 24% | Moderate | High | |
| Iron | 92 | 14% | Moderate | Moderate | |
| Lead | 59 | 2% | Moderate | Low | |
| Nitrate | 89 | 1% | Moderate | Low | |
| Chloride | 198 | 1% | High | Low | |
| Arsenic | 33 | 0% | Moderate | Low | |
| Fluoride | 54 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 14 | 0% | Low | Safe | |
| Nitrite | 81 | 0% | Moderate | Low | |
| PFHxS ⓘ municipal | 14 | 0% | Low | Safe | |
| PFNA ⓘ municipal | 14 | 0% | Low | Low | |
| PFOA ⓘ municipal | 14 | 0% | Low | Safe | |
| PFOS ⓘ municipal | 14 | 0% | Low | Safe | |
| Sulfate | 92 | 0% | Moderate | Low | |
| Uranium | 15 | 0% | Moderate | Low | |
| Total Coliform | 2* | 0% | Low | Low ⓘ | |
| Sodium | 110 | — | High | Low | |
| pH | 163 | — | High | Low | |
| PFBS ⓘ municipal | 14 | — | Low | Safe | |
| Hardness | 104 | — | High | Low | |
| Fecal Coliform | 2* | 0% | Low | Low ⓘ | |
| E. coli | 2* | 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.
* 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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