Lemon Grove Water Hardness & Quality Report (2026)

Lemon Grove, California, in San Diego County — a major east San Diego suburban community (Lemon Grove is a significant San Diego County city — an east San Diego suburb adjacent to La Mesa and Spring Valley; Lemon Grove is known as the 'Lemon Capital of the World' (the city adopted the lemon theme as its civic identity in the early 20th century, when lemon groves covered much of the area; the downtown Lemon Grove giant lemon statue (a large concrete lemon at the Lemon Grove train station) is one of the most recognizable civic landmarks in east San Diego County; Lemon Grove's lemon festival and civic identity reflect this agricultural heritage); Lemon Grove is one of the most ethnically and economically diverse communities in the San Diego metropolitan area (Lemon Grove has a significant Mexican-American, Filipino-American, and African-American community; the city is known for its diversity and for the Lemon Grove Incident (the 1931 Lemon Grove Incident — the first successful legal challenge to school segregation in United States history, in which Mexican-American families in Lemon Grove successfully challenged the segregation of their children into a separate school; it predates the Brown v. Board of Education case by 23 years)), a diverse San Diego County community — draws its municipal water supply via the Helix Water District. Water hardness in Lemon Grove measures 165.5 mg/L — classified as hard.

Lemon Grove's hard supply reflects the east San Diego County SDCWA blended supply's calcareous-moderate character. The Helix Water District distributes Colorado River and local groundwater to the Lemon Grove zone, producing the hard 165.5 mg/L.

At 165.5 mg/L, Lemon Grove residents face regular hard water challenges. Monthly descaling and water softeners are recommended. Helix Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.