Groundwater in Oneida County contains forever chemicals known as PFOA, PFOS, PFHXS, and PFNA at levels that exceed EPA health standards. These contaminants warrant attention and testing for anyone using a private well in this area.
Forever chemicals accumulate in groundwater from human activities like firefighting foam used at airports and military sites, industrial manufacturing, and disposal of contaminated materials. These chemicals persist in the environment for decades and spread through groundwater over time.
The water in Oneida County is soft with moderate iron levels. Iron dissolves from rock layers as water moves underground and concentrates in certain areas. These mineral characteristics appear across many wells in the county, though iron levels and other properties vary from well to well.
Oneida County well water commonly contains PFOA, PFOS, PFHXS, and PFNA--chemicals called "forever chemicals" because they break down very slowly in the environment and in your body. These chemicals can build up over time from drinking contaminated water. Exposure to high levels has been linked to health effects including liver damage, thyroid problems, and changes in cholesterol and immune function. The more you drink contaminated water over many years, the greater your health concern.
The good news about minerals in this county's wells is that the water is soft with very low sodium and sulfate. You won't see much staining, scale buildup, or taste problems from hard water minerals. Your appliances should last a normal lifespan, and you won't need a water softener for hardness. The moderate iron levels may occasionally cause light orange-brown stains, but this is minor compared to what other counties experience.
Testing is the only way to know what is actually in your well, since every well is different and your water may have higher or lower levels than what is typical in the county. We recommend a comprehensive water panel that checks for these forever chemicals along with other contaminants--testing typically costs $200-400. If your well contains these chemicals, treatment options like activated carbon filters or reverse osmosis systems can remove them.
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 ⓘ |
|---|---|---|---|---|---|
| Manganese | 23 | 70% | Moderate | High | |
| Iron | 23 | 57% | Moderate | High | |
| PFOA ⓘ municipal | 17 | 29% | Moderate | High | |
| PFOS ⓘ municipal | 17 | 12% | Moderate | Moderate | |
| PFNA ⓘ municipal | 17 | 6% | Moderate | Moderate | |
| PFHxS ⓘ municipal | 17 | 6% | Moderate | Moderate | |
| Arsenic | 1 | 0% | Low | Safe ⓘ | |
| Chloride | 38 | 0% | Moderate | Low | |
| Fluoride | 21 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 17 | 0% | Moderate | Safe | |
| Lead | 1 | 0% | Low | Safe ⓘ | |
| Nitrate | 23 | 0% | Moderate | Low | |
| Nitrite | 13 | 0% | Low | Low | |
| Sulfate | 23 | 0% | Moderate | Low | |
| Hardness | 23 | — | Moderate | Low | |
| PFBS ⓘ municipal | 17 | — | Moderate | Low | |
| pH | 53 | — | Moderate | Low | |
| Sodium | 23 | — | Moderate | 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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