Well Water in Dutchess County: What to Test and Why

Groundwater in Dutchess County contains radon, lead, iron, manganese, chloride, sulfate, PFOA, and PFOS. Several of these contaminants exceed EPA health standards and warrant testing and possible treatment.

These contaminants come from two sources. Radon, iron, and manganese dissolve naturally from the limestone and rock layers underground as water moves through them. Lead, chloride, PFOA, and PFOS enter groundwater from human activities--road salt spreading in winter, old plumbing materials, industrial chemicals, and contaminated sites--and persist in the groundwater because the limestone bedrock allows water to move relatively fast and carry these substances downward.

Groundwater in this county is moderately hard, driven primarily by calcium and magnesium released from the limestone bedrock below. Iron also contributes to the water's mineral character. The carbonate rock in this area naturally releases these minerals into water that filters down, and the moderate hardness and iron content are widespread across wells throughout the county.

Wells in Dutchess County exceed EPA health standards for several contaminants. Chloride and sulfate at elevated levels can harm people with high blood pressure or heart conditions. Lead damages the nervous system, particularly in children, and can affect brain development and learning. Radon is a radioactive gas that increases cancer risk over time. PFOA and PFOS are human-made chemicals that can affect the immune system and liver. Manganese at high levels can affect brain function and development in children.

The moderate iron content in county wells creates reddish-brown staining on clothes, fixtures, and plumbing. You may notice a metallic taste in your water. The moderately hard water here can cause scale buildup in pipes and reduce the lifespan of water heaters and dishwashers over time.

We recommend a comprehensive water test to find out what is actually in your well, since every well is different and yours could have higher or lower levels than what is common here. Testing is the only way to know what needs treatment. A comprehensive metals and minerals panel typically costs between $200-400. Depending on your results, treatment options like water softeners, iron filters, and radon removal systems can address these concerns.