Well Water in Willacy County: What to Test and Why

Groundwater in Willacy County contains iron, manganese, nitrate, arsenic, and fluoride. Several of these contaminants exceed EPA health standards, making them a concern for well owners in this area.

These contaminants come from the geology and human activity around you. The coastal lowlands here have rock and soil that naturally release iron and manganese into groundwater. Nitrate, arsenic, and fluoride enter from a mix of natural sources in the rock and agricultural activity on the land above.

Groundwater in this county is notably high in iron and manganese, the metals that give the water its character. These metals dissolve out of the rocks as water moves through the coastal aquifer system beneath the county. Iron and manganese are common findings across wells here, reflecting the consistent geology throughout the region.

Wells in Willacy County show arsenic, fluoride, iron, manganese, and nitrate at levels above EPA health standards. Arsenic exposure over time can increase cancer risk and cause skin problems. Fluoride at high levels can damage bones and teeth, especially in children. Manganese can affect the nervous system and learning in young kids. Nitrate is especially dangerous for babies and pregnant women, causing a serious blood condition.

Iron and manganese in county well water create rusty or black staining on sinks, toilets, and laundry. You may notice a metallic or unpleasant taste. These minerals can also leave scale buildup inside pipes and on fixtures over time.

We recommend testing your well to find out exactly what is in your water, 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 to be treated. A comprehensive panel checking for metals and minerals typically costs between $200 and $400. Treatment options like reverse osmosis filters or ion exchange systems can remove many of these contaminants from your drinking water.