Well Water in Stanly County: What to Test and Why

Groundwater in Stanly County contains radon, PFOS, manganese, arsenic, and iron at levels that exceed EPA health standards. These contaminants are present at concerning concentrations that well owners should monitor and address.

These contaminants come from the crystalline rock below the county. Radon is released naturally as radioactive elements in the rock break down over time. Manganese and iron dissolve from minerals in the bedrock when water sits in contact with the rock for long periods. PFOS and arsenic enter groundwater through industrial and historical land use, and arsenic also occurs naturally in some rock formations.

Groundwater in this county is soft and has low levels of iron and sulfate, but contains moderate sodium. The soft character reflects the nature of the crystalline rock here, which does not dissolve as easily as limestone and does not release large amounts of hardness minerals. Most wells in Stanly County show this soft water pattern, though some wells will have higher levels of individual contaminants depending on local conditions and depth.

Wells in Stanly County have been found to contain arsenic, iron, manganese, PFOS, and radon at levels that exceed EPA health standards. Arsenic exposure over time can increase the risk of cancer and cause damage to the nervous system and skin. Radon is a radioactive gas that increases lung cancer risk, especially with long-term exposure. Iron and manganese at high levels can affect the nervous system, though this concern is less common than arsenic and radon. PFOS is a synthetic chemical linked to health problems including immune system effects and liver damage.

The good news for many wells in this county is that water tends to be relatively soft, which means fewer problems with scale buildup in pipes and appliances. Sodium levels in county wells are moderate, which is generally not a major concern for most people. Since iron levels in the county are typically low, residents are less likely to notice the reddish staining or metallic taste that comes with high iron water.

We recommend testing your well water to find out what is actually in it, since every well is different and yours could have higher or lower levels than the county average. A comprehensive panel that checks for metals, minerals, bacteria, and chemicals runs between two hundred and four hundred dollars. Testing is the only way to know if treatment is needed, and options like activated carbon filters or radon mitigation systems can address specific problems once you know what you are dealing with.