Groundwater in Ogemaw County contains iron, arsenic, and manganese that well owners should be aware of. These contaminants exceed EPA health standards and warrant attention.
These metals come from the Marshall aquifer rock itself. As groundwater moves slowly through the sandstone and other rock layers beneath the county, iron and manganese dissolve naturally into the water. Arsenic also occurs naturally trapped in the rock minerals.
Groundwater in Ogemaw County is notably high in iron, which is the primary aesthetic concern. Iron dissolves from minerals in the Marshall aquifer as water sits in contact with the rock. This characteristic is widespread across wells in the county.
Wells in Ogemaw County commonly contain arsenic, chloride, iron, manganese, and sulfate at levels that exceed EPA health standards. Arsenic is the most serious concern--long-term exposure builds up in your body and increases your risk of cancer and organ damage. Manganese at elevated levels can harm your brain and nervous system, especially in children. Iron and chloride also pose health risks when they exceed safe drinking water limits. These contaminants come from natural minerals in the rock and soil beneath the county.
Beyond health concerns, wells in this county show very high iron levels that will stain your sinks, toilets, and laundry with reddish-brown marks. The water may taste metallic or unpleasant. High levels of sulfate and sodium can give the water an off-taste. These minerals also build up inside pipes and appliances, shortening the lifespan of your water heater and dishwasher.
We recommend testing your well water as soon as possible. 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 it can be treated properly. Because multiple contaminants exceed health standards here, ask the lab for a comprehensive metals and minerals panel, which typically costs $200-400. Iron removal systems and arsenic treatment options like reverse osmosis 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 | |
| Sulfate | 9 | 11% | Low | Moderate ⓘ | |
| Chloride | 9 | 11% | Low | Moderate ⓘ | |
| Fluoride | 9 | 0% | Low | Low ⓘ | |
| HFPO-DA (GenX) ⓘ municipal | 2 | 0% | Low | Safe ⓘ | |
| Lead | 2 | 0% | Low | Safe ⓘ | |
| Nitrate | 1 | 0% | Low | Low ⓘ | |
| 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 ⓘ | |
| 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.
Loading recent water news…