Mountain Brook Water Hardness & Quality Report (2026)

Birmingham Water Works (also referred to as Central Alabama Water) supplies Mountain Brook, Alabama, a suburb in southeastern Jefferson County serving around 22,000 residents. Water is sourced from multiple surface supplies: the Cahaba River and Lake Purdy Reservoir feed the Shades Mountain Filter Plant; Sipsey and Mulberry Forks of the Warrior River supply the Western Filter Plant; Inland Lake serves the Putnam Filter Plant; and Inland Lake or Sipsey Fork feeds the Carson Filter Plant. Raw water is pumped to these four treatment facilities in the Birmingham metro area for processing before distribution.

The supply originates in the Cahaba and Black Warrior River watersheds, draining central Alabama's Ridge and Valley province. Key geological features include Mississippian-age Bangor Limestone and Hartselle Sandstone in the Cahaba area, and Pennsylvanian Pottsville Conglomerate sandstones with interbedded shales and coals in the Warrior Basin. No major aquifer is directly tapped; surface runoff interacts with these carbonate and siliciclastic formations, imparting a moderately mineralised character from natural dissolution processes, with limestone weathering adding calcium and magnesium.

Moderately hard water leads to moderate scale buildup in appliances like water heaters, dishwashers, and coffee makers, reducing efficiency over time and potentially shortening lifespan. Faucet aerators and showerheads may clog, affecting flow. Regular maintenance includes monthly vinegar descaling for fixtures, annual professional flushing of water heaters, and installing mesh screens on faucets. A water softener is often recommended for households with hard water concerns to prevent spotting on dishes and dry skin effects. The utility reports no MCL violations, though two contaminants exceed EPA health guidelines (MCLGs); PFAS presence is noted indirectly via quality advisories. Treatment involves conventional filtration, disinfection, and coagulation at the four plants.