Water Quality in Texas: Complete Guide
Everything homeowners need to know about Texas tap water - hardness, contaminants, treatment options, and costs.
Quick summary: Texas has an average water hardness of 189 PPM across 76 cities. 80% of cities have hard water above 120 PPM. PFAS contamination is detected above EPA limits in at least one city. Most Texas households will benefit from a water softener.
Water Hardness Across Texas
Texas's water hardness ranges from 67 PPM in Beaumont to 298 PPM in San Angelo, with a statewide average of 189 PPM. This makes Texas one of the harder-water states in the country. The national average is approximately 120 PPM.
Most Texas cities use surface water (rivers, lakes, reservoirs), which generally has lower mineral content than groundwater. The wide range in hardness across the state reflects significant geological variation.
Contaminants of Concern in Texas
PFAS: The average PFAS level across Texas cities is 34.0 ppt. Sugar Land has the highest detected PFAS at 828.52 ppt, above the EPA maximum contaminant level of 4 ppt. Residents should consider a reverse osmosis or NSF P473-certified filter for drinking water.
Lead: Lead contamination comes from plumbing infrastructure, not the water source. Texas homes built before 1986 are at higher risk due to lead solder. 3 cities show lead levels above 5 ppb.
Do You Need a Water Softener in Texas?
In most of Texas, yes. With 80% of cities having hard water above 120 PPM, the majority of households will see measurable benefits from a water softener - lower energy bills, less soap usage, and longer appliance life.
Impact of Hard Water in Texas
At the state average of 189 PPM, untreated hard water causes measurable household impact: scale buildup that reduces water heater efficiency (DOE estimates up to 22%), increased soap and detergent use, premature appliance failure, and plumbing maintenance. A water softener ($600-$1,500 installed) eliminates these problems.