Groundwater in Ogemaw County contains iron, arsenic, and manganese that well owners should be aware of. Several of these contaminants exceed EPA health standards, making water quality a concern that warrants testing.
The Marshall aquifer rock beneath this county naturally contains iron-bearing minerals that dissolve into groundwater as water moves slowly through the rock. Arsenic and manganese also occur naturally in these same rock layers and concentrate in the water over time as groundwater sits in contact with the minerals.
Groundwater in this county is hard, driven by elevated calcium and magnesium from the limestone and mineral-rich rock below. Iron dissolves from rock minerals as water passes through, contributing to the hardness and mineral character of the water. Wells across Ogemaw County commonly show these elevated mineral levels.
Wells in Ogemaw County commonly contain arsenic, chloride, iron, manganese, and sulfate at levels exceeding EPA health standards. Arsenic is a poison that builds up in your body over time and increases cancer risk. Manganese at elevated levels can harm your brain and nervous system. Iron itself is not poisonous but at high levels causes serious health concerns. Chloride and sulfate at these concentrations also pose risks to your health.
Wells in this county often have water that stains sinks, toilets, and laundry reddish-brown from iron. Manganese can leave dark stains too. Your water may taste metallic or have a musty smell. The extremely hard water leaves thick white scale on fixtures and inside pipes, which shortens the lifespan of water heaters and dishwashers.
We recommend testing your well as soon as possible. Every well is different, and yours could 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 it can be properly treated. Because multiple contaminants exceed health standards here, a comprehensive metals and minerals panel runs $200-400. Iron removal systems and arsenic treatment can address these problems.
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 | 10 | 70% | Low | High | |
| Arsenic | 9 | 33% | Low | High ⓘ | |
| Manganese | 10 | 30% | Low | High | |
| Chloride | 9 | 11% | Low | Moderate ⓘ | |
| Sulfate | 9 | 11% | Low | Moderate ⓘ | |
| Fluoride | 9 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Lead | 2 | 0% | Low | Safe ⓘ | |
| Nitrite | 1 | 0% | Low | Safe ⓘ | |
| PFHxS ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFNA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFOA ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| PFOS ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Uranium | 1 | 0% | Low | Low ⓘ | |
| Nitrate | 1 | 0% | Low | Low ⓘ | |
| Hardness | 9 | — | Low | Low ⓘ | |
| PFBS ⓘ municipal | 2 | — | Low | Safe ⓘ | |
| pH | 10 | — | Low | 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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