Well Water in Shelby County: What to Test and Why

Groundwater in Shelby County contains iron, arsenic, manganese, nitrate, and sulfate at levels that exceed EPA health standards. These contaminant levels are concerning and require testing and treatment.

These metals dissolve naturally from the fractured bedrock as groundwater moves slowly through cracks in the rock. Arsenic and manganese sit locked inside the stone itself, while iron leaches out over time. Nitrate and sulfate also build up as water sits in contact with the minerals in this layer.

Groundwater in this county is very hard, driven by elevated calcium and magnesium from the limestone and shale below. The same rock that produces hardness also releases iron and other metals into the water. These hard-water and elevated-mineral characteristics are widespread across wells throughout the county.

Wells in Shelby County commonly exceed EPA health standards for arsenic, iron, manganese, nitrate, and sulfate. Arsenic is a poison that builds up in your body over time and can increase the risk of cancer. Iron and manganese at these levels can affect children's brain development and nervous system function. Nitrate is especially dangerous for infants and can interfere with how blood carries oxygen. These are serious contaminants that need attention.

The water in this county is extremely hard, which causes thick white crusty buildup on faucets and fixtures. Iron at the high levels found here stains sinks, toilets, and laundry orange-brown. You may notice a metallic or bitter taste in your water. Hard water this extreme can shorten the lifespan of water heaters and dishwashers.

We recommend testing your well with a comprehensive metals and minerals panel because every well is different and your water may have higher or lower levels than what is common in the county. Testing is the only way to know what is actually in your well so it can be properly treated. Treatment options include water softeners combined with iron filters and point-of-entry systems.