Laguna Hills Water Hardness & Quality Report (2026)

Laguna Hills, California, in Orange County — a major south Orange County suburban community (Laguna Hills is a significant south Orange County city in the Saddleback Valley corridor — adjacent to Aliso Viejo, Mission Viejo, and Laguna Niguel in one of California's most affluent suburban corridors; Laguna Hills was incorporated in 1991 from the unincorporated Leisure World/Laguna Hills area), home of Leisure World Laguna Hills (one of the largest senior retirement communities in the United States — a gated active adult community with thousands of residents that was developed beginning in 1964; one of the original models for large-scale active adult planned communities in California), a diverse Orange County community with a primarily affluent senior, professional, and suburban family population, adjacent to the Santa Ana Mountains foothills, and in the south Orange County hills corridor — draws its municipal water supply via the South Coast Water District or El Toro Water District. Water hardness in Laguna Hills measures 63.5 mg/L — classified as moderately soft.

Laguna Hills's moderate softness reflects the south Orange County MWD import supply blend with effective treatment. The supply comes from the Metropolitan Water District blending Colorado River Aqueduct and State Water Project imports (treated), producing the moderately soft 63.5 mg/L.

With hardness at 63.5 mg/L, Laguna Hills residents enjoy moderately soft water. El Toro Water District consistently delivers water meeting all California SWRCB and EPA Safe Drinking Water Act requirements.