Well Water in Atascosa County: What to Test and Why

Groundwater in Atascosa County contains iron, manganese, chloride, arsenic, and fluoride at levels that exceed EPA health standards. These contamination levels are serious enough that well owners should test their water and consider treatment.

The Texas coastal uplands rock formation beneath this county naturally contains these metals and salts. As water moves slowly through these rock layers over time, iron and manganese dissolve into it. Chloride, arsenic, and fluoride also occur naturally in the deep rocks here. Agricultural and oil and gas activities in the region may add to chloride and other salt levels in some areas.

Groundwater in this county is hard, driven by calcium and magnesium from the rock below, and contains elevated iron that stands out as a key characteristic. The coastal uplands rock naturally releases these minerals as water passes through. These mineral-rich conditions are widespread across wells throughout the county.

Wells in Atascosa County commonly have arsenic, chloride, and fluoride at levels that exceed EPA health standards. Arsenic can harm your kidneys and skin over time. Fluoride at elevated levels can damage your bones and teeth. Chloride at high concentrations in drinking water is a health concern. Manganese and iron also show up above health standards in county wells and can affect your nervous system and organs.

The hard water in this county creates everyday problems around the house. Iron leaves orange or brown stains on laundry, sinks, and fixtures. Hard water makes soap less effective and leaves white crusty scale buildup inside pipes and on faucets. These mineral deposits can shorten the lifespan of water heaters and dishwashers. You might notice a metallic or bitter taste in the water.

Testing your well is the only way to know what is actually in your water. Every well is different, and your water could have higher or lower levels than what is common in the county. We recommend a comprehensive metals and minerals panel, which costs between two hundred and four hundred dollars. Water softeners, iron filters, and reverse osmosis systems can address these concerns once you know your specific results.