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Alameda County, CA,

Drinking Water Well Testing

The Alameda County Public Works Agency (ACPWA), Water Resources Section does not conduct water well testing. This is generally done by private state certified laboratories. For more information, please see Other Useful Links below.

ACPWA recommends that bacterial testing be conducted at least once a year for all drinking well water. For more information, see the Alameda County Department of Environmental Health document on Drinking Water Well Testing.

Drinking water well test data may be obtained through ACWPA, Water Resources Section or through the Alameda County Health Care Services Department at:

Attn: Water Resources Section
Alameda County Public Works Agency
399 Elmhurst Street, Hayward, CA 94544
Phone: 510-670-6633
Fax: 510-782-1939


Department of Environmental Health
1131 Harbor Bay Parkway
Alameda, CA 94502-6577
Phone: 510-567-6700
Fax: 510-337-9432

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