Well Water in Cass County: What to Test and Why

Groundwater in Cass County contains arsenic, chloride, and e. coli. The levels of these contaminants are low and do not exceed EPA health standards.

These contaminants come from natural sources in the mixed rock layers beneath the county. The arsenic occurs naturally in the rock itself. Chloride can enter from road salt and natural minerals in the underground layers. E. coli may come from shallow contamination, though it is detected at low levels in most wells.

Groundwater in this county is very hard, driven by elevated calcium and magnesium from the limestone and rock layers below. As water moves slowly through these mineral-rich layers, it dissolves calcium and magnesium that make the water hard. Very hard water is common across wells in Cass County.

Wells in Cass County show no contaminants exceeding EPA health standards based on current data. However, arsenic, chloride, and bacteria have been detected in some county wells and deserve attention. Arsenic has no taste or smell and can cause serious health problems with long-term exposure. Bacteria like E. coli can make you sick right away. Chloride at elevated levels may affect people who need to watch their salt intake.

The biggest quality-of-life issue in this county is extremely hard water. Hard water leaves white, crusty buildup on faucets, showerheads, and inside pipes. It makes soap less effective and can leave clothes feeling stiff. Over time, very hard water can shorten the lifespan of water heaters and dishwashers. You may also notice a chalky feeling on your skin after showering.

We recommend testing your well water because every well is different and yours 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 you can treat it properly. A basic health screen for bacteria and nitrate runs about $50 to $100, while a comprehensive metals and minerals panel costs $200 to $400. Water softeners and iron filters are common treatment options for hard water.