Well Water in Cass County: What to Test and Why

Groundwater in Cass County contains radon, iron, chloride, fluoride, lead, manganese, nitrate, and sulfate. Several of these contaminants exceed EPA health standards and warrant attention from well owners.

The Mississippi embayment aquifer system underlying this county naturally contains elevated levels of these minerals and elements. Radon comes from radioactive decay in the rock layers below. Iron, manganese, and sulfate occur naturally where groundwater moves through sediment layers rich in these minerals. Chloride and nitrate can come from both natural sources and human activity like agriculture or septic systems.

Groundwater in this county is soft but elevated in iron and sodium from the underlying aquifer rock. The sediments that make up the Mississippi embayment release these dissolved minerals as water flows through them over time. These characteristics are widespread across wells throughout the county.

Several analytes in Cass County wells exceed EPA health standards, including lead, radon, nitrate, fluoride, chloride, iron, manganese, and sulfate. Lead damages the brain and nervous system, especially in children, and can harm kidneys and blood pressure in adults. Radon is a radioactive gas that increases lung cancer risk. Nitrate is dangerous for infants and can cause serious illness. Fluoride, manganese, iron, chloride, and sulfate at elevated levels also pose health concerns for your family.

Wells in this county have moderate iron levels that can stain laundry, fixtures, and skin with orange or brown marks. You may notice a metallic taste in your water or see reddish buildup in pipes and appliances. Moderate sodium in the water can affect taste and may be a concern if someone in your home has heart or kidney problems. The good news is that Cass County wells are soft, so you won't see the heavy scale buildup that hard water causes.

We recommend a comprehensive water test, since multiple analytes exceed health standards in county wells and every well is different from the next. Your well could have higher or lower levels than what's common here--testing is the only way to know what you're actually dealing with. A comprehensive metals and minerals panel typically costs $200 to $400 and will show exactly what needs treatment. Treatment options like reverse osmosis systems, water softeners, or activated carbon filters can address multiple concerns at once.