Bridgeport Water Hardness & Quality Report (2026)

The Bridgeport Water Department is a municipal utility providing drinking water to approximately 1,600 residents in Lawrence County, southeastern Illinois. The supply is sourced entirely from local groundwater wells tapping shallow and intermediate aquifers in the Wabash River Valley region. Water is drawn from multiple wells and treated at the city's groundwater treatment facility with aeration, filtration, chlorination, and fluoride addition before distribution; there are no surface water treatment plants.

Groundwater recharges through glacial till and outwash deposits overlying Pennsylvanian shale, sandstone, and limestone bedrock of the Illinois Basin, including the Carbondale Formation and fossiliferous limestones from the Mississippian Period. The regional Mt. Simon Sandstone aquifer also influences mineral content. Percolation through karstic limestone and dolomite strata dissolves high concentrations of calcium and magnesium, naturally imparting a hard character to the groundwater — distinct from the softer surface waters found near major rivers or lakes.

Scale buildup is the primary practical concern, affecting water heaters, dishwashers, washing machines, faucets, boilers, and coffee makers, increasing energy costs by up to 20–30% and shortening appliance life. Monthly vinegar descaling, drain screens, and scale-inhibiting filters are recommended. A water softener is strongly advised to prevent spotting on glassware, dry skin and hair, and plumbing clogs. Bridgeport's water meets EPA standards overall; lead levels are low at 0.00642 mg/L and copper compliance is achieved. Treatment uses chlorine disinfection (residual ~0.5–1.0 mg/L), pH adjustment to 7.5–8.5, and fluoridation; iron and manganese are managed through aeration and filtration.