Highland Park Water Hardness & Quality Report (2026)

The City of Highland Park Water Department provides water to roughly 11,000 individuals in Wayne County, Michigan. This supply originates from the Detroit River, a key component of the Detroit River-Lake St. Clair watershed. Raw water is treated at the Water Works Park and Springwells Water Treatment Plants, both operated by the Great Lakes Water Authority (GLWA) in Detroit. Here, the river water undergoes standard filtration, disinfection, and chemical adjustments before being distributed to Highland Park residents. The utility diligently monitors local water quality, checking for bacteria, chlorine levels, disinfection byproducts, and the presence of lead and copper directly at the tap. The Detroit River watershed is extensive, covering several sub-basins across both the U.S. and Canada.

Geologically, the region is characterized by Paleozoic bedrock, specifically Devonian-age limestone and dolomite formations. As water flows through this watershed, it dissolves calcium and magnesium carbonates from these soluble mineral layers. This natural process, combined with mineral contributions from erosion of calcareous materials in glacial deposits, results in a hard water profile typical for rivers in Michigan's Lower Peninsula. These carbonate bedrock and glacial drift influences mean the water carries an elevated mineral content, although surface water dynamics can moderate extreme variations.

Homeowners in Highland Park may notice scale buildup in appliances like water heaters, dishwashers, and washing machines, which can decrease their efficiency and shorten their lifespan. You might also observe reduced soap lathering and soap scum residue on fixtures. To manage these effects, regular descaling of appliances, using vinegar for cleaning faucets, and installing drain screens can help. Given the mineral content, installing a water softener is often recommended to improve soap performance and protect your plumbing system. The utility's recent water quality reports confirm compliance with federal standards, addressing concerns about pH, lead, and disinfection byproducts, with lead risks primarily linked to internal plumbing rather than the source water.