
Atascadero, California | Municipal Water Utility Company | Public Service Announcement
The municipal water supply in Atascadero Mutual Water Company may contain significant contaminants including Bacteria & Viruses, Styrene and Ethylbenzene, and residents might experience elevated levels of water hardness. Atascadero Mutual Water Company provides the community with water sourced from Purchased surface water supplies.
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Atascadero Mutual Water Company Area Details

Area served:
Atascadero, California

Population served:
30563

Water source:
Purchased surface water

Phone:
805-466-2428

Address:
5005 El Camino Real, Atascadero, CA 93422

3date
Contaminants Detected In Atascadero, California
Arsenic; Bromodichloromethane; Chloroform; Chromium (hexavalent); Dibromochloromethane; Dichloroacetic acid; Total trihalomethanes (TTHMs); Arsenic; M… more

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Atascadero Mutual Water Company
Annual Municipal Water Report
List of Municipal Water Contaminants Tested by Atascadero Mutual Water Company
Tested But Not Detected:
1,1,1-Trichloroethane; 1,1,2,2-Tetrachloroethane; 1,1,2-Trichloroethane; 1,1-Dichloroethane; 1,1-Dichloroethylene; 1,2,3-Trichloropropane; 1,2,4-Trichlorobenzene; 1,2-Dibromo-3-chloropropane (DBCP); 1,2-Dichloroethane; 1,2-Dichloropropane; 1,3-Butadiene; 1,3-Dichloropropene; 2,4,5-TP (Silvex); 2,4-D; Alachlor (Lasso); Aluminum; Antimony; Atrazine; Barium; Bentazon (Basagran); Benzene; Beryllium; Bromochloromethane; Bromomethane; Cadmium; Carbofuran; Carbon tetrachloride; Chlordane; Chlorodifluoromethane; Chloromethane; cis-1,2-Dichloroethylene; Cobalt; Cyanide; Dalapon; Dichloromethane (methylene chloride); Dinoseb; Diquat; Endrin; Ethylbenzene; Ethylene dibromide; Glyphosate; Heptachlor; Heptachlor epoxide; Hexachlorobenzene (HCB); Hexachlorocyclopentadiene; Lindane; m- & p-Xylene; Mercury (inorganic); Methoxychlor; Molinate; Monochlorobenzene (chlorobenzene); MTBE; Nitrate & nitrite; Nitrite; o-Dichlorobenzene; o-Xylene; Oxamyl (Vydate); p-Dichlorobenzene; Pentachlorophenol; Perchlorate; Perfluorobutane sulfonate (PFBS); Perfluoroheptanoic acid (PFHPA); Perfluorohexane sulfonate (PFHXS); Perfluorononanoic acid (PFNA); Perfluorooctane sulfonate (PFOS); Picloram; Polychlorinated biphenyls (PCBs); Silver; Simazine; Styrene; Tetrachloroethylene (perchloroethylene); Thallium; Thiobencarb; Toluene; Toxaphene; trans-1,2-Dichloroethylene; Trichloroethylene; Trichlorofluoromethane; Trichlorotrifluoroethane; Vinyl chloride; Xylenes (total)

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Atascadero Mutual Water Company
About Us
Understanding Your Water Supply
Municipal water sources include streams, lakes, reservoirs, springs, and wells. As water travels over land or underground, it naturally dissolves minerals and, in some cases, radioactive materials. It can also pick up substances from animal presence or human activities.
To ensure tap water safety, the U.S. Environmental Protection Agency (EPA) and the State Water Resources Control Board establish regulations limiting contaminant levels in public water systems. These same standards apply to bottled water through State Board regulations to protect public health.
All water, including bottled varieties, can reasonably contain small amounts of some contaminants. Their presence doesn't necessarily indicate a health risk. Potential contaminants include:
- Microbial Contaminants: Viruses and bacteria from sewage treatment plants, septic systems, agricultural operations, and wildlife
- Inorganic Contaminants: Salts and metals occurring naturally or resulting from urban runoff, industrial discharges, oil/gas production, mining, or farming
- Pesticides and Herbicides: From agriculture, urban runoff, and residential uses
- Organic Chemical Contaminants: Synthetic and volatile organic chemicals from industrial processes, petroleum production, gas stations, urban runoff, and septic systems
- Radioactive Contaminants: Naturally occurring or resulting from oil/gas production and mining
For more information about contaminants and potential health effects, call the EPA's Safe Drinking Water Hotline at (800) 426-4791.

For more information on your municipal water, visit the U.S. Environmental Protection Agency:
Atascadero Mutual Water Company Municipal Water Company and EPAAtascadero Mutual Water Company Municipal Water Report Info
Atascadero Mutual Water Company (AMWC) is committed to delivering exceptional customer service to shareholders, staff, and the public. Our Customer Service Specialists are professionally trained and available Monday through Friday during regular business hours to assist with water account matters and concerns.
Our administrative team supports the Customer Service Department, performs various functions to assist shareholders and employees, and ensures AMWC meets all reporting requirements as a mutual water corporation.
System Overview:
AMWC serves over 30,000 residents through approximately 250 miles of pipeline ranging from 4 to 24 inches in diameter. The system includes:
- 9 storage tanks (120,000 gallons to 4.8 million gallons)
- 17 active wells
- 8 booster stations
- 5 treatment facilities
- 20 pressure-reducing stations
- Over 10,000 customer connections
- 1,900 valves and 1,700 fire hydrants
System elevations range from 800 feet at the well fields along the Salinas River to 1,916 feet at the Summit Hills tank.
Our Operations Team:
Full-time Water Distribution Operators and Water Treatment Operators manage AMWC's production and distribution systems. These highly trained professionals maintain certifications from the State Water Resources Control Board and undergo continuous education to stay current with evolving drinking water regulations.
Company History:
Incorporated on August 13, 1913, by Atascadero's founder E.G. Lewis, AMWC is the oldest continuously operating organization in the Colony of Atascadero. As one of California's largest retail mutual water companies, AMWC has provided water for domestic and irrigation purposes to its shareholders for over a century and currently serves more than 30,000 people.
Municipal Water Utility Company FAQ

For more information on your municipal water, visit the U.S. CDC:
Atascadero Mutual Water Company Municipal Water Company and CDCFrequently Asked Questions
- How do I find directions to the Town Hall?
- What's the process for obtaining a dog license?
- How do I apply for a cat license?
- Where can I get birth, marriage, or death certificates?
- What steps should I take to obtain a marriage license?
- What are the local garbage collection rules and guidelines?
- Where can I find information about recycling policies in our area?

Atascadero Mutual Water Company provides municipal water services to residents of Atascadero and surrounding areas in California.
Get the Atascadero Mutual Water Company Official Water Score Report for Free (limited time offer).

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