Well Water in Lapeer County: What to Test and Why

Groundwater in Lapeer County contains arsenic, iron, and manganese. These contaminants exceed EPA health standards and warrant immediate testing of your well.

The Marshall aquifer beneath this county naturally contains arsenic, iron, and manganese locked in the rock itself. As groundwater moves slowly through the sandstone, these metals dissolve into the water over time, and low-oxygen conditions underground make this process more likely.

Groundwater in this county is notably high in iron. Iron concentrates in the water as it sits in contact with the sandstone rock, and these elevated levels are common across wells in the area.

Wells in Lapeer County commonly exceed EPA health standards for arsenic, which is a poison that builds up in your body over time and increases your risk of cancer and organ damage. Iron and manganese also exceed their limits in many wells here, and both can affect your health with long-term exposure. Chloride and sulfate are present at elevated levels too, though they pose fewer direct health risks than arsenic.

Beyond health concerns, the high iron levels in county wells will stain your sinks, toilets, and laundry orange-brown. You may notice a metallic taste in your water or a rotten-egg smell from the sulfate. These minerals also build up inside water heaters and pipes, shortening their lifespan and requiring more frequent repairs.

We recommend testing your well water right away, since every well is different and yours may have higher or lower levels than what is typical in the county. Testing is the only way to know what is actually in your water so you can treat it properly. Since multiple contaminants exceed health standards here, a comprehensive metals and minerals panel (around $200-400) is recommended rather than a basic screen. An arsenic-removal system paired with a water softener can address your main concerns.