Well Water in Delaware County: What to Test and Why

Your well draws water from old limestone and dolomite rock that sits hundreds of feet underground. This rock is very old and has lots of tiny cracks and spaces where water fills in. Water in this county moves slowly through these cracks, picking up minerals as it goes.

Arsenic, manganese, and sulfate come straight from the rock itself. As groundwater sits in contact with the limestone, dolomite, and shale layers, these metals and minerals dissolve out. The rock contains natural sulfur compounds that break down into sulfate over time. There is no protection from the geology here—these contaminants are built into the stone.

Your water is extremely hard and loaded with minerals. The hardness level is so high that white, chalky buildup will coat your pipes, water heater, and fixtures. You will see orange and brown staining on sinks and laundry from the iron and manganese. The sodium and sulfate levels are very elevated, making the water taste salty and potentially causing digestive trouble.

Arsenic exceeds EPA health standards in Delaware County well water. This is a serious contamination problem that requires immediate action. Your well water also contains manganese, sulfate, and chloride at levels that exceed EPA health standards. This combination of contaminants makes your water unsafe to drink without treatment.

Long-term exposure to arsenic increases the risk of cancer and organ damage. Manganese exposure can harm your nervous system and brain development, especially in children. The extremely high sulfate and sodium levels will give your water a bitter taste and may cause digestive problems. Your water is also extremely hard, leaving white crusty buildup on fixtures and inside pipes.

Contact a state-certified lab right away for a comprehensive test. A basic health screen runs $50–100, but given your area's arsenic priority status, request a full mineral and metals panel for $200–400. A whole-house treatment system combining arsenic removal with water softening and sulfate reduction will address your contamination.