Odessa Water Hardness & Quality Report (2026)

The City of Odessa Utilities Department provides drinking water to approximately 110,000 residents across a 35-square-mile area in Ector County, Texas. All water is purchased untreated from the Colorado River Municipal Water District (CRMWD). Primary sources are surface water from Lake Ivie in Runnels County, Lake Thomas in Scurry County, and Lake Spence in Coke County. CRMWD handles all conventional treatment — coagulation, sedimentation, filtration, and disinfection — before delivering water via pipelines to Odessa; there are no local treatment plants.

The watershed encompasses the headwaters of the Colorado River in West Texas, draining through Permian Basin red beds and underlying formations. Key geological units include Cretaceous limestones and Permian dolomite, anhydrite, and gypsum layers from the Clear Fork and San Andres Groups, as well as evaporites in the Whitehorse Group. Carbonate and sulfate minerals dissolve readily into the water, contributing high calcium, magnesium, and total dissolved solids typical of West Texas arid karst terrains, resulting in a very hard and highly mineralized supply.

Very hard water in Odessa causes significant scale buildup in pipes, water heaters, dishwashers, washing machines, and fixtures — water heaters may fail two to three times faster than normal. Soap lathering is poor, causing dry skin and higher detergent use. Annual descaling of appliances, sediment pre-filters, and regular flushing of hot water systems are recommended; a whole-house water softener is strongly advised. Water quality reports note total dissolved solids around 1,100 ppm and nitrates that can spike with rainfall; the city complies with EPA standards via CRMWD treatment including chlorination; pH typically 7.5–8.2; multi-stage surface water processing includes lime softening, though insufficient against extreme mineralization.