Troy Water Hardness & Quality Report (2026)

The City of Troy Water Department provides drinking water to about 15,311 residents in Troy, Illinois. Their municipal system relies entirely on groundwater, drawing from four wells situated west of Collinsville in Madison County. This supply originates from the region's glacial and bedrock aquifer systems. The City of Troy Water Department is committed to meeting Safe Drinking Water Act standards and publishes annual Consumer Confidence Reports. You can reach them at 116 E. Market Street, Troy, IL 62294, or by phone at (618) 667-9924.

The groundwater tapped by Troy's wells filters through Paleozoic-era limestone and dolomite formations, spanning the Ordovician through Devonian periods. These rock types are known for their solubility, meaning they easily dissolve and release minerals like calcium and magnesium into the water. This geological characteristic is common throughout southwestern Illinois and is the direct cause of the naturally hard water supplied to the community.

Homeowners in Troy might notice scale accumulating in appliances, pipes, and fixtures due to the water's hardness. This mineral buildup can reduce the efficiency of soaps and detergents and potentially shorten the lifespan of appliances like dishwashers and washing machines. To combat these effects, many residents opt for water softening systems, either whole-house or point-of-use. Routine maintenance for water heaters and occasional pipe flushing can also help manage mineral deposits. While the water meets all EPA standards with no violations, the utility advises flushing taps for a minute or two after water has been idle to minimize any potential lead exposure from household plumbing.