Beverly Hills Water Hardness & Quality Report (2026)

The City of Beverly Hills Public Works Department manages water services for approximately 34,000 residents across 5.7 square miles in Los Angeles County. The supply blends treated groundwater from Beverly Hills Treatment Plant wells with imported water from the Metropolitan Water District of Southern California (MWD). MWD sources include the State Water Project — drawing from the Sacramento and San Joaquin Rivers via reservoirs such as Castaic Lake — and the Colorado River Aqueduct. Annual Consumer Confidence Reports are available at beverlyhills.org; inquiries can be directed to 310-285-1000.

Local groundwater originates in the Hollywood Basin, recharged by rainfall and urban runoff percolating through alluvial gravels and fractured sedimentary rocks of the Puente and Fernando Formations (Miocene age). These carbonate-bearing strata and evaporitic soils impart a hard character to the groundwater, while imported surface waters acquire minerals from limestone-dominated watersheds and aqueduct leaching across the Sacramento-San Joaquin Delta, Sierra Nevada foothills, and Colorado River Basin, resulting in a mineralised, hard supply overall.

Very hard water promotes limescale buildup in pipes, heaters, and fixtures, reducing efficiency and lifespan — water heaters are most affected, with scale insulating heating elements and raising energy bills 20–30%. Dishwashers, washing machines, and faucet aerators also suffer clogging. Install scale-inhibiting filters, flush water heaters annually, and use vinegar soaks for fixtures; a water softener is recommended for households. Water meets EPA standards per daily testing, with fluoride added at 0.6–1.2 mg/L; no PFAS or lead/copper violations noted in available reports; pH typically 7.5–8.5.