Richmond Water Hardness & Quality Report (2026)

Richmond, California receives its drinking water from the East Bay Municipal Utility District (EBMUD), serving over 1.2 million people across Alameda and Contra Costa Counties, including cities such as Richmond, Oakland, and Berkeley. The primary source is the Mokelumne River watershed, impounded by Pardee Reservoir behind Pardee Dam. Water is conveyed over 80 miles via three steel aqueducts to treatment facilities, with gravity flow up to 202 million gallons per day or 325 million with pumping, then post-treated with chloramine and fluoride before distribution through 3,944 miles of pipes and 164 neighborhood reservoirs.

The Mokelumne watershed spans the Sierra Nevada foothills, characterized by granitic batholith rocks and metamorphic formations with low carbonate content. These geological features yield a soft supply, as rainwater and snowmelt dissolve minimal calcium and magnesium from the predominantly igneous terrain. No significant aquifers are involved; surface water dominates, preserving the low-mineralized character shaped by the watershed's geology.

Soft water in Richmond produces negligible scale buildup, posing no risk to plumbing, appliances, or skin. Soap lathers easily and fixtures remain clean with standard maintenance. No water softener is needed, as naturally low mineral levels prevent hardness-related issues like spotting or reduced efficiency in water heaters and dishwashers. EBMUD maintains compliance with federal and state standards; treatment includes filtration, chloramine disinfection, and fluoride addition. Third-party tests note haloacetic acids (HAA5 & HAA9) exceeding health guidelines in some monitoring, though within legal limits; the 2021 Consumer Confidence Report affirms overall safety with no system violations.