Ferndale Water Hardness & Quality Report (2026)

The City of Ferndale Department of Public Works operates the water utility, serving approximately 22,380 residents in Ferndale, Michigan, within Oakland County. Water is purchased as treated surface water from the Detroit Water and Sewerage Department (DWSD), sourced from Lake Huron. No local treatment plant is mentioned; the utility distributes the supply via infrastructure at 300 East Nine Mile Road, Ferndale, MI 48220 (phone: 248-546-2525). Treatment by DWSD includes disinfection, coagulation, and filtration before delivery to Ferndale's distribution system.

The supply originates from the Lake Huron watershed, part of the Great Lakes basin encompassing forested, agricultural, and urban lands in southeastern Michigan. Pleistocene glacial deposits overlie Devonian-age limestone and shale bedrock of the Michigan Basin, forming karst-influenced hydrology. Natural dissolution of carbonate minerals imparts a hard character to the water, elevating calcium and magnesium without significant softening from peat or igneous influences typical of softer northern watersheds.

Very hard water promotes significant limescale buildup in water heaters, dishwashers, coffee makers, and washing machines, reducing efficiency and lifespan. Faucets and showerheads clog quickly, laundry feels stiff, and skin may dry out. Monthly vinegar descaling of visible fixtures, annual professional servicing of heaters, and a whole-house water softener are strongly recommended. The 2023 Consumer Confidence Report confirms compliance with EPA and Michigan standards; however, six contaminants (arsenic, hexavalent chromium, total chromium, manganese, selenium, dichloroacetic acid) exceed health advocacy guidelines. Lead concerns are addressed via flushing protocols due to potential service lines — test first/last draw samples at approved labs. DWSD maintains pH and copper compliance; radiologicals, lithium, and chlorodifluoromethane are noted in vicinity alerts.