Marshall Water Hardness & Quality Report (2026)

The City of Marshall Public Works Department operates the water utility serving Marshall, Texas, in Harrison County near the Louisiana border. Water is sourced exclusively from groundwater wells tapping the Carrizo-Wilcox Aquifer. Treatment occurs at city facilities including wellhead treatment and a central distribution system, serving approximately 23,000 residents. The utility can be contacted at 903-935-4421. Recent quality assessments report a Quality Score of 80/100 with minor concerns, and residents should consult the annual Consumer Confidence Report for current compliance data on contaminants and treatment.

The supply originates from the Carrizo-Wilcox Aquifer, part of the Gulf Coast Aquifer System in Northeast Texas. This aquifer consists of unconsolidated to semi-consolidated sands, gravels, silts, and clays from the Eocene Carrizo Sand and overlying Wilcox Group formations, with interbedded calcareous zones. Recharge occurs via rainfall infiltration in outcrop areas to the west, flowing eastward; the geology imparts a hard character through dissolution of calcium- and magnesium-bearing minerals from limestone stringers and shell fragments in the sediments.

At hard levels, mineral buildup causes scale in pipes and reduces flow efficiency over time, shortening the lifespan of water heaters, dishwashers, and washing machines by 30–50%. Soap lathering is poor, leading to residue on dishes, skin dryness, and hair dryness. Annual descaling of fixtures, installing sediment filters, and flushing hot water tanks are recommended maintenance steps. A water softener is strongly recommended to mitigate scaling and extend appliance life. Treatment involves disinfection and basic filtration at wells; residents should check the annual CCR for updates on contaminant levels and any violations.