
Los Angeles County, California | Municipal Water Utility Company | Public Service Announcement
Recent testing reveals San Gabriel County WD residential water may contain concerning levels of Fluoride, Chromium (total) and trans-1,2-Dichloroethylene, alongside elevated water hardness measurements. The district supplies households with water sourced from Purchased surface water systems throughout the service area.
What's in your tap water?
Free Water Safety Report for San Gabriel County WD. (limited time offer)
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San Gabriel County WD Area Details

Area served:
Los Angeles County, California

Population served:
45265

Water source:
Purchased surface water

Phone:
626-287-0341

Address:
8366 Grand Avenue, Rosemead, CA 91770

3date
Contaminants Detected In Los Angeles County, California
Bromodichloromethane; Chromium (hexavalent); Dibromochloromethane; Nitrate; Tetrachloroethylene (perchloroethylene); Total trihalomethanes (TTHMs); Ar… more

Free Water Safety Report for San Gabriel County WD. (limited time offer)
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San Gabriel County WD
Annual Municipal Water Report
List of Municipal Water Contaminants Tested by San Gabriel County WD
Tested But Not Detected:
1,1,1,2-Tetrachloroethane; 1,1,1-Trichloroethane; 1,1,2,2-Tetrachloroethane; 1,1,2-Trichloroethane; 1,1-Dichloroethane; 1,1-Dichloroethylene; 1,1-Dichloropropene; 1,2,3-Trichlorobenzene; 1,2,4-Trichlorobenzene; 1,2,4-Trimethylbenzene; 1,2-Dibromo-3-chloropropane (DBCP); 1,2-Dichloroethane; 1,2-Dichloropropane; 1,3,5-Trimethylbenzene; 1,3-Butadiene; 1,3-Dichloropropane; 1,3-Dichloropropene; 2,2-Dichloropropane; 2,3,7,8-TCDD (Dioxin); 2,4,5-TP (Silvex); 2,4-D; 2-Chloroethylvinyl ether; Alachlor (Lasso); Aluminum; Antimony; Asbestos; Atrazine; Barium; Bentazon (Basagran); Benzene; Benzo[a]pyrene; Beryllium; Bromobenzene; Bromochloromethane; Bromomethane; Cadmium; Carbofuran; Carbon tetrachloride; Chlordane; Chloroethane; Chloromethane; cis-1,2-Dichloroethylene; cis-1,3-Dichloropropene; Cobalt; Cyanide; Dalapon; Di(2-ethylhexyl) adipate; Di(2-ethylhexyl) phthalate; Dibromomethane; Dichloroacetic acid; Dichlorodifluoromethane; Dichloromethane (methylene chloride); Dinoseb; Diquat; Endothall; Endrin; Ethyl tert-butyl ether; Ethylbenzene; Ethylene dibromide; Glyphosate; Heptachlor; Heptachlor epoxide; Hexachlorobenzene (HCB); Hexachlorobutadiene; Hexachlorocyclopentadiene; Isopropyl ether; Isopropylbenzene; Lindane; m- & p-Xylene; m-Dichlorobenzene; Manganese; Mercury (inorganic); Methoxychlor; Methyl ethyl ketone; Methyl isobutyl ketone; Molinate; Monobromoacetic acid; Monochloroacetic acid; Monochlorobenzene (chlorobenzene); MTBE; n-Butylbenzene; N-Nitrosodimethylamine (NDMA); n-Propylbenzene; Naphthalene; Nitrite; o-Chlorotoluene; o-Dichlorobenzene; o-Xylene; Oxamyl (Vydate); p-Chlorotoluene; p-Dichlorobenzene; p-Isopropyltoluene; Pentachlorophenol; Perchlorate; Perfluorobutane sulfonate (PFBS); Perfluoroheptanoic acid (PFHPA); Perfluorohexane sulfonate (PFHXS); Perfluorononanoic acid (PFNA); Perfluorooctane sulfonate (PFOS); Perfluorooctanoic acid (PFOA); Picloram; Polychlorinated biphenyls (PCBs); sec-Butylbenzene; Selenium; Silver; Simazine; Styrene; tert-Amyl methyl ether; tert-Butylbenzene; Thallium; Thiobencarb; Toluene; Toxaphene; trans-1,2-Dichloroethylene; trans-1,3-Dichloropropene; Trichloroacetic acid; Trichlorofluoromethane; Trichlorotrifluoroethane; Vinyl chloride; Xylenes (total)

What's in your tap water?

Discover which substances exceed Legal and Health Guidelines in your local water supply.
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San Gabriel County WD
About Us
Beyond mandatory water quality standards, both the U.S. EPA and California State have established voluntary water quality goals. These goals represent aspirational targets that guide water management practices, even when they may be difficult to achieve or measure precisely.
The water quality reports include three key goal categories:
- Maximum Contaminant Level Goal (MCLG): The level below which no health risks are expected, established by the U.S. EPA.
- Public Health Goal (PHG): Similar to MCLGs but set by California's Environmental Protection Agency.
- Maximum Residual Disinfectant Level Goal (MRDLG): The safe level for water disinfectants, recognizing their importance in controlling microbial contamination.
Potential Contaminant Sources in Water:
Our water comes from rivers, lakes, streams, reservoirs, and wells. As it travels, it can pick up various substances including:
- Microbial contaminants from sewage systems, agricultural operations, and wildlife
- Inorganic substances like salts and metals occurring naturally or from urban runoff and industrial processes
- Pesticides and herbicides from various sources including agriculture and residential usage
- Organic chemicals from industrial processes, petroleum production, gas stations, and stormwater runoff
- Radioactive materials that can be naturally occurring or result from resource extraction activities
To protect public health, the U.S. EPA and State Water Resources Control Board enforce regulations limiting contaminant levels in public water systems and bottled water. These safeguards ensure your tap water remains safe for consumption.

For more information on your municipal water, visit the U.S. Environmental Protection Agency:
San Gabriel County WD Municipal Water Company and EPASan Gabriel County WD Municipal Water Report Info
The San Gabriel County Water District was established on November 12, 1921 under the County Water District Act (Statutes 1913, P. 1049). This legislation allows residents of any county area—incorporated, unincorporated, or both—to organize a District to provide water for domestic, agricultural, and industrial purposes.
The District's assets are publicly owned, belonging to the community members similar to city property. The first water board election occurred on January 10, 1922, with the inaugural Board of Directors meeting held on February 20, 1922 at the District's original office at 538 West Mission Drive, San Gabriel.
Initially, the District encompassed areas within San Gabriel city limits and unincorporated regions beyond. Through expansion initiatives, the District's territory now consists of approximately 60% within San Gabriel and 40% across Rosemead, Temple City, and unincorporated County areas.
Per the County Water District Act, a five-member Board of Directors elected by District voters oversees operations. Board members must reside within the District boundaries and are responsible for approving expenditures, establishing water rates, and potentially levying charges for bond payments or operational costs.
The Board continuously monitors conditions affecting the water supply, securing water rights and planning infrastructure to meet community demands. Currently, the District maintains 8,900 active services serving roughly 45,000 residents across 2,680 acres. Infrastructure includes three reservoirs with 12.8 million gallons combined storage capacity, five active wells, and 82 miles of water mains.
Our Mission: San Gabriel County Water District strives to provide exceptional water for residential, commercial, industrial, and fire protection needs that meets or exceeds all regulatory standards while delivering responsive service at reasonable rates to our customers.
Municipal Water Utility Company FAQ

For more information on your municipal water, visit the U.S. CDC:
San Gabriel County WD Municipal Water Company and CDC.. ...

San Gabriel County WD provides municipal water services to residents of Rosemead and throughout Los Angeles County, California.
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