Sawtelle Water Hardness & Quality Report (2026)

Sawtelle, California, a neighborhood on the west side of Los Angeles in Los Angeles County — a historic Japanese-American neighborhood (Sawtelle was one of Los Angeles's earliest Japanese-American community settlement areas, known as 'Little Osaka,' with the Sawtelle Japan Town corridor on Sawtelle Boulevard remaining a center of Japanese-American restaurants and culture), adjacent to West Los Angeles, Brentwood, and the VA Greater Los Angeles Healthcare System, and a gentrifying west LA corridor — draws its municipal water supply from the West Coast Basin and MWD import via the LADWP. Water hardness in Sawtelle measures 127 mg/L — classified as moderately hard.

Sawtelle's moderate hardness reflects LADWP Westside distribution characteristics blending MWD Colorado River–SWP import with local West Coast Basin groundwater. The West Coast Basin (part of the LA Basin coastal aquifer system) is replenished with MWD import water (the Colorado River aqueduct supply at ~280–310 mg/L and State Water Project supply at ~80–100 mg/L). The LADWP blends and treats these sources, and the Westside Sawtelle distribution zone produces the moderate 127 mg/L — softer than the San Gabriel Valley due to more MWP coastal influence.

At 127 mg/L, Sawtelle residents encounter moderate scale accumulation. Monthly cleaning with citric acid solution is recommended. LADWP consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.