Well Water in Llano County: What to Test and Why

Groundwater in Llano County contains nitrate, iron, and arsenic. Iron and nitrate are present at levels that exceed EPA health standards and warrant attention.

Nitrate enters groundwater from fertilizers and septic systems in areas where the soil and rock do not filter it out well. Iron dissolves naturally from the rock as water moves through underground layers. Arsenic also occurs naturally in some rock formations in this region. The combination of these sources--agricultural activity, natural mineral release, and local geology--creates the contaminant profile well owners encounter here.

Groundwater in this county is characterized by moderate iron content. Iron dissolves into water as it passes through the rock layers beneath Llano County. Iron is a common finding across wells in this area.

Wells in Llano County commonly contain iron and nitrate at levels that exceed EPA health standards. Nitrate is a particular concern for infants under six months old, as exposure can interfere with how their blood carries oxygen. Iron itself is not directly toxic, but elevated amounts can indicate contamination from other sources. Both of these contaminants warrant attention through testing and treatment.

Iron in county wells causes visible staining on fixtures, laundry, and sinks with a reddish or brownish color. You may notice a metallic or bitter taste in the water. These minerals can build up inside pipes and appliances, affecting water flow over time. Hard water also makes soap less effective for cleaning and bathing.

We recommend testing your well water because every well is different--yours could have higher or lower levels than what is common in the county. A comprehensive metals and minerals panel costs between two hundred and four hundred dollars and is the only way to know what is actually in your water so it can be properly treated. Iron filters and treatment systems can remove these contaminants if testing shows they are present in your well.