Groundwater in Ottawa County contains iron, manganese, sulfate, chloride, nitrate, and PFOA. Several of these contaminants exceed EPA health standards, making this water a serious concern for well owners.
These contaminants come from the mixed rock layers beneath the county. Iron and manganese dissolve naturally as groundwater sits in contact with rock in low-oxygen conditions deep underground. Chloride enters from road salt applied to winter roads, and nitrate can come from soil and septic systems. PFOA is a chemical that enters groundwater from industrial sources and certain consumer products.
Groundwater in this county is very hard, driven by elevated calcium and magnesium from the surrounding rock. Iron reaches very high levels here. The mixed geology--layers of sand, gravel, and other rocks--creates conditions where these minerals concentrate as water moves slowly through the ground. Hard water and high iron are common characteristics across most wells in Ottawa County.
Wells in Ottawa County commonly contain chloride, iron, manganese, nitrate, PFOA, and sulfate at levels exceeding EPA health standards. Manganese and nitrate are particularly concerning--manganese can harm brain development in children and affect nervous system function with long-term exposure, while nitrate poses serious risks to infants and pregnant women. Iron and PFOA also present health concerns with repeated exposure over time. Chloride and sulfate contribute to the overall contamination profile in county wells.
The water in this county is extremely hard, which creates daily quality-of-life challenges. High iron causes orange and brown staining on sinks, toilets, and laundry that is difficult to remove. You may notice a metallic taste or rotten-egg odor from sulfate. White crusty scale builds up quickly inside pipes, faucets, and appliances, and this extreme hardness can shorten the lifespan of water heaters and dishwashers.
We recommend a comprehensive metals and minerals panel to determine what is actually in your well--every well is different, and your water may have higher or lower levels than what is common in the county. Testing is the only way to know what treatment your specific well needs. A comprehensive panel typically costs $200-$400. Treatment options include iron removal systems, water softeners, and reverse osmosis filters, depending on your test 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 | 15 | 67% | Moderate | High | |
| Sulfate | 16 | 44% | Moderate | High | |
| Chloride | 16 | 19% | Moderate | High | |
| Manganese | 9 | 11% | Low | Moderate ⓘ | |
| PFOA ⓘ municipal | 55 | 4% | Moderate |
Moderate
Elevated concentration, not % above limit
|
|
| Arsenic | 9 | 0% | Low | Low ⓘ | |
| Fluoride | 15 | 0% | Moderate | Low | |
| HFPO-DA (GenX) ⓘ municipal | 53 | 0% | Moderate | Safe | |
| Nitrate | 10 | 0% | Low | Low | |
| Nitrite | 3 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 53 | 0% | Moderate | Low | |
| PFNA ⓘ municipal | 56 | 0% | Moderate | Safe | |
| PFOS ⓘ municipal | 53 | 0% | Moderate | Low | |
| Hardness | 16 | — | Moderate | Low | |
| PFBS ⓘ municipal | 53 | — | Moderate | Low | |
| pH | 18 | — | Moderate | Low | |
| Sodium | 9 | — | Low | 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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