Groundwater in Isanti County contains arsenic, chloride, iron, lead, manganese, pfos, and sulfate at levels that exceed EPA health standards. These contaminants are present at concentrations serious enough that well owners should test their water and consider treatment options.
These contaminants come from both natural and human sources in the county. Arsenic, iron, and manganese occur naturally in the rock and soil, while chloride and sulfate can enter groundwater from road salt, fertilizer, and septic systems. PFOS is a human-made chemical used in firefighting foam and industrial products that has contaminated some wells in the region.
Groundwater in this county is hard, driven primarily by calcium and magnesium from the bedrock below. Many wells across Isanti County show this hard water signature, though the iron levels are moderate rather than extreme.
Wells in Isanti County have been found with arsenic, chloride, iron, lead, manganese, and PFOS at levels above EPA health standards. Arsenic and lead are serious concerns because they can damage your kidneys and nervous system, and lead is especially harmful to children's brain development. Manganese at high levels can affect your brain and nervous system. PFOS is a chemical linked to health problems including immune and liver effects.
The hard water in county wells can leave stains on your fixtures and dishes, and scale buildup inside pipes and water heaters. This mineral buildup shortens the lifespan of appliances like dishwashers and water heaters. You may also notice a metallic taste or cloudiness in your water from iron and manganese.
We recommend a comprehensive water test to find out exactly what is in your well, since every well is different and yours could have higher or lower levels than others in the county. Testing is the only way to know what you are dealing with so you can choose the right treatment. A comprehensive metals and minerals panel costs between $200 and $400. Treatment options range from whole-house filters to water softeners depending on what testing shows.
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 ⓘ |
|---|---|---|---|---|---|
| PFOA ⓘ municipal | 24 | 67% | Moderate | High | |
| Manganese | 246 | 64% | High | High | |
| PFOS ⓘ municipal | 21 | 62% | Moderate | High | |
| PFHxS ⓘ municipal | 8 | 50% | Low | High ⓘ | |
| PFNA ⓘ municipal | 14 | 50% | Low | High | |
| Nitrate | 96 | 45% | Moderate | High | |
| Iron | 248 | 28% | High | High | |
| Arsenic | 133 | 8% | High | Moderate | |
| Chloride | 289 | 5% | High |
Moderate
Elevated concentration, not % above limit
|
|
| Lead | 224 | 4% | High |
Moderate
Elevated concentration, not % above limit
|
|
| Fluoride | 147 | 0% | High | Low | |
| HFPO-DA (GenX) ⓘ municipal | 4 | 0% | Low | Safe ⓘ | |
| Nitrite | 27 | 0% | Moderate | Low | |
| Sulfate | 266 | 0% | High | Low | |
| Uranium | 3 | 0% | Low | Safe ⓘ | |
| Sodium | 248 | — | High | Low | |
| pH | 77 | — | Moderate | Low | |
| PFBS ⓘ municipal | 6 | — | Low | Low ⓘ | |
| Hardness | 28 | — | 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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