Sibley County well water contains iron, manganese, and arsenic at levels that exceed EPA health standards, along with lead, nitrate, and industrial chemicals like PFOA and PFOS. Multiple contaminants here are at concerning levels that require attention.
The bedrock beneath this county naturally releases iron, manganese, and arsenic into groundwater as water moves through the rock layers below. Nitrate and sulfate enter from agricultural and urban land use, while PFOA and PFOS come from industrial sources and contaminated sites that have seeped into the water supply.
Groundwater in this county is very hard, with extremely high iron and elevated sodium and sulfate concentrations that define its character. The local rock naturally dissolves and releases these minerals as water passes through, making these conditions widespread across most wells in the area.
Wells in Sibley County commonly have arsenic, lead, nitrate, and industrial chemicals called PFOA and PFOS above EPA health limits. Arsenic and lead are poisons that build up in your body over time and can damage your kidneys, liver, and nervous system. Lead is especially harmful to children's brain development. Nitrate is dangerous for babies under six months old because it prevents their blood from carrying oxygen properly. PFOA and PFOS are human-made chemicals that can affect your immune system and thyroid.
Sibley County well water is extremely hard with very high iron levels, which creates serious quality-of-life problems. Orange and brown rust stains cover laundry, sinks, and fixtures. Scale builds up inside pipes and appliances, shortening the lifespan of water heaters and dishwashers. The water may taste metallic or have a sulfur smell. Soap doesn't work well, and your skin and hair feel sticky after washing.
We recommend getting your well tested with a comprehensive metals and minerals panel since multiple contaminants exceed health standards. Every well is different, and your well may have higher or lower levels than what is common in the county. Testing is the only way to know what is actually in your water so you can treat it properly. A comprehensive panel costs between $200 and $400. Treatment options like reverse osmosis filters or whole-home water softeners with iron removal can address these 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 ⓘ |
|---|---|---|---|---|---|
| Iron | 124 | 92% | High | High | |
| Manganese | 24 | 62% | Moderate | High | |
| Arsenic | 108 | 44% | High | High | |
| PFOS ⓘ municipal | 3 | 33% | Low | High ⓘ | |
| PFOA ⓘ municipal | 3 | 33% | Low | High ⓘ | |
| PFHxS ⓘ municipal | 3 | 33% | Low | High ⓘ | |
| Sulfate | 124 | 22% | High | High | |
| Lead | 108 | 1% | High | Low | |
| Nitrate | 123 | 1% | High | Low | |
| Chloride | 124 | 0% | High | Low | |
| Fluoride | 124 | 0% | High | Low | |
| HFPO-DA (GenX) ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Uranium | 90 | 0% | Moderate | Low | |
| Nitrite | 104 | 0% | High | Low | |
| PFNA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Radon | 3 | 0% | Low | Low ⓘ | |
| Hardness | 9 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 3 | — | Low | Low ⓘ | |
| pH | 13 | — | Low | Low | |
| Sodium | 124 | — | 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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