Well Water in DeWitt County: What to Test and Why

Groundwater in DeWitt County contains radon, chloride, iron, arsenic, fluoride, and manganese at levels that exceed EPA health standards. These contaminants are present at amounts serious enough that well owners should test their water and consider treatment options.

The coastal plain rocks beneath this county naturally hold these minerals and radioactive elements. Radon comes from natural breakdown of uranium in the rock layers. Chloride, iron, and manganese occur where salty water from ancient seas mixed with freshwater, and where iron-bearing rock dissolves slowly into the groundwater. Arsenic and fluoride also release from the rock itself as water moves through it over time.

Groundwater in this county is very hard, driven by elevated calcium and magnesium minerals from the rock below, along with high sodium that adds to the mineral load. The coastal plain geology here naturally concentrates these dissolved minerals as water filters down through layers of sand and clay. These characteristics are common across wells throughout the county, reflecting the uniform composition of the aquifer system.

Wells in DeWitt County sometimes contain arsenic, chloride, fluoride, iron, manganese, and radon at levels above EPA health standards. Arsenic can harm your kidneys and increase cancer risk with long-term exposure. Radon is a radioactive gas that raises lung cancer risk when you breathe it in over time. Chloride and fluoride at elevated levels can cause dental problems and other health concerns with regular consumption.

The very hard water in county wells leaves scale buildup on pipes and fixtures, causes white staining on sinks and showers, and shortens the lifespan of water heaters and dishwashers. High sodium levels in the water can affect taste and may concern people on low-sodium diets. Iron staining leaves orange or brown marks on laundry, fixtures, and surfaces around your home.

We recommend testing your well water with a comprehensive panel since multiple contaminants exceed health standards in this county. Every well is different, and your water could have higher or lower levels than what we see across the county. Testing is the only way to know exactly what is in your water so you can treat it properly. A comprehensive metals and minerals panel typically costs between two hundred and four hundred dollars. Water softeners and radon removal systems are common treatment options for these concerns.