Water service in Napa County may be provided by the county water authority, individual municipal water departments, or rural water districts, depending on where a property is located. There are 5 Water Departments locations in Napa County, California.

Property owners in Napa County who are connecting a new building to public water or requesting a new meter installation should contact the applicable water department well in advance, as permit review, inspection scheduling, and tap fee collection may take several weeks before service can begin.

List of Napa County, California Water Departments

Calistoga Water Department

View Details Call Now (707) 942-2847

Calistoga Water Department

Address
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Hours

Napa Water Billing

View Details Call Now (707) 257-9508

Napa Water Billing

Address
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Hours

Napa County Water Department

View Details Call Now (707) 259-8600

Napa County Water Department

Address
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Hours

Napa Water Department

View Details Call Now (707) 257-9521

Napa Water Department

Address
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Hours

St Helena Water Department

View Details Call Now (707) 968-2745

St Helena Water Department

Address
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Hours

Residents of Napa County who rely on private wells rather than a public water system should contact the county health department for information about voluntary testing programs. The county water department can advise on whether extending public water service to a private-well property is feasible in your area.

You may also find Water Departments locations in neighboring counties including Napa, Solano, Sonoma.