Tujunga Water Hardness & Quality Report (2026)

Tujunga, California, in Los Angeles County — a major north San Fernando Valley foothill community (Tujunga is a significant Los Angeles neighborhood — a north San Fernando Valley foothill community adjacent to Sunland and Shadow Hills; Tujunga is situated at the mouth of Tujunga Canyon, one of the most dramatic canyon entries into the San Gabriel Mountains from the San Fernando Valley; the Big Tujunga Wash is a major seasonal stream and flood control corridor running through Tujunga from the San Gabriel Mountains into the San Fernando Valley floor; Tujunga is known for its relatively rural foothill character compared to the flat suburban neighborhoods of the San Fernando Valley floor; Tujunga and Sunland form the Sunland–Tujunga area (one of the northernmost communities in the City of Los Angeles, with a terrain and community character that is distinctly different from most of the LA urban grid)), a diverse Los Angeles County community with a primarily working-class and lower-middle-class, white and Hispanic-American foothill residential population — draws its municipal water supply via the Los Angeles Department of Water and Power. Water hardness in Tujunga measures 111 mg/L — classified as moderately hard.

Tujunga's moderate hardness reflects the north LA County Tujunga Canyon mixed supply's calcareous-moderate character. The LADWP distributes a blend of MWD Southern California imported water and local groundwater to the Tujunga zone, producing the moderate 111 mg/L.

At 111 mg/L, Tujunga residents encounter moderate scale accumulation. Monthly cleaning is recommended. LADWP consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.