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- Los Angeles County Waterworks District No. 21, Kagel Canyon
- Los Angeles County Waterworks District No. 29, Malibu
- Los Angeles County Waterworks District No. 36, Val Verde
- Los Angeles County Waterworks District No. 37, Acton
- Los Angeles County Waterworks District No. 40, Antelope Valley
- Marina Del Rey Water System
- Rancho Los Amigos Water System
Public Health Goals Reports
Los Angeles County Waterworks District No. 40 Regions 4 & 34 is required by California Environmental Protection Agency to prepare a triennial Public Health Goals (PHGs) report to inform consumers with information on the detection of any contamination above any Public Health Goals established by the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment (OEHHA) or Maximum Contaminant Level Goals (MCLGs) set by the United States Environmental Protection Agency.
2016 Public Health Goals Report
2019 Public Health Goals Report