Roseville Water Hardness & Quality Report (2026)

The City of Roseville Department of Public Services operates the municipal water system serving approximately 61,535 residents in Roseville, Macomb County, Michigan. Water is sourced from the Detroit River via the Great Lakes Water Authority (GLWA), which provides treated bulk water delivered through regional transmission mains to the Roseville distribution network. The GLWA's Water Resource Recovery Facility in Detroit handles primary treatment, including coagulation, filtration, disinfection, and corrosion control, before distribution to member communities such as Roseville. The system delivers water meeting EPA standards to residential and commercial customers throughout the city.

The Detroit River watershed connects Lake Huron to Lake Erie, draining a vast Great Lakes Basin area marked by Paleozoic carbonate rock formations including Devonian dolomites and limestones. Soluble bedrock layers such as the Bois Blanc and Bass Islands formations release calcium and magnesium minerals into the riverine flow, shaping a characteristically mineralised supply. Surface water dynamics and limited groundwater contribution result in a moderately mineralised profile driven by limestone dissolution in this carbonate-dominated terrain.

Moderately hard water promotes scale buildup in pipes, water heaters, and dishwashers, reducing efficiency and lifespan while increasing energy costs. Washing machines and faucets are affected, with diminished soap lathering and spotting on dishes or fixtures; regular vinegar descaling is recommended, along with a water softener to protect plumbing. Roseville's water earns an A grade (85/100), with no contaminants exceeding EPA maximums among 69 tested; lead at 0.009 mg/L (90th percentile) surpasses health goals but remains below the 0.015 mg/L action level. The system has 15 violations on record, including 2 health-based in 2025, mainly monitoring and reporting issues; no specific PFAS exceedances are noted in recent reports.