Well Water in Caswell County: What to Test and Why

Groundwater in Caswell County contains radon, iron, and arsenic at levels that exceed EPA health standards. These contaminants are present at concentrations the EPA considers concerning and warrant attention from well owners.

The crystalline bedrock beneath Caswell County naturally contains these elements. Radon seeps from cracks in the rock, iron dissolves from minerals in the granite and similar stone, and arsenic occurs naturally in the same bedrock formations. Ground conditions in this area release these substances into water as it moves through the rock layers.

Groundwater in Caswell County is soft but high in iron, which is the dominant mineral that shapes its character. Iron comes from the crystalline bedrock that makes up the county's aquifer--as water sits in contact with these rocks, iron dissolves and enters the water. This iron-rich character appears across many wells throughout the county.

Wells in Caswell County show arsenic, iron, and radon at levels above EPA health standards. Arsenic can damage your kidneys and increase cancer risk even at low amounts over time. Radon is a radioactive gas that enters your lungs and raises the chance of lung cancer. Iron does not cause health problems at the levels found in county wells, but it does affect your water quality.

The high iron in county wells causes orange or brown staining on sinks, toilets, and laundry. You may notice a metallic taste in your water or see rust-colored buildup in pipes. The water itself is soft, which means you will not have heavy scale buildup, but the iron staining is a real problem for keeping your home clean.

We recommend a comprehensive water test to find out exactly what is in your well, since every well is different and yours could have higher or lower levels than the county average. Testing is the only way to know what needs treatment. A full metals and minerals panel costs between two hundred and four hundred dollars. Treatment options for arsenic and radon include special filters and aeration systems that a water professional can help you choose.