Well Water in Davidson County: What to Test and Why

Groundwater in Davidson County contains arsenic, manganese, radon, chloride, and PFOS. Several of these contaminants exceed EPA health standards and deserve attention from well owners.

The rock beneath Davidson County is hard crystalline granite and similar material. As water moves slowly through cracks and fractures in this rock over many years, it dissolves arsenic and manganese naturally present in the stone. Radon comes from the decay of radioactive elements in the same bedrock. Chloride and PFOS can enter groundwater from road salt, industrial sources, and other human activities on the land surface above.

Groundwater in Davidson County is soft with moderate iron. The crystalline rock here releases iron into water as it slowly dissolves, and this iron concentration stands out as a notable feature of the county's water. Most wells in the county show similar characteristics because they all draw from the same type of bedrock.

Wells in Davidson County can contain arsenic, chloride, manganese, PFOS, and radon at levels above EPA health standards. Arsenic exposure over time increases the risk of cancer and can harm the kidneys and nervous system. Radon is a radioactive gas that builds up in homes and raises lung cancer risk. Manganese at high levels can affect the brain and cause nervous system problems, especially in children. Chloride and PFOS are contaminants of concern that require attention.

The moderate iron levels in county wells can stain laundry and plumbing fixtures with reddish marks and create a metallic taste. The good news is that wells in this county are generally soft, so you probably won't see heavy scale buildup on your pipes and fixtures or need to replace appliances early from mineral damage.

We recommend testing your well with a comprehensive panel because multiple contaminants exceed health standards in this county. Every well is different, and your water could have higher or lower levels than what's common here. Testing is the only way to know what's actually in your well so you can treat it properly. A comprehensive metals and minerals panel typically costs between $200 and $400. Treatment options like activated carbon filters or reverse osmosis systems can address several of these concerns.