Napa County, California Water Systems

Napa County, California

62 community water systems on record — 28 active, 34 inactive.

Every active community water system nationwide must produce a Consumer Confidence Report under the EPA's revised rule, effective for reports due July 1, 2027.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.

Community water systems in Napa County, California

System name	City	Population served	Status
ADVENTIST HEALTH - ST. HELENA HOSPITAL	ST. HELENA	817	Active
AMERICAN CANYON, CITY OF	AMERICAN CANYON	21,437	Active
BENTLEY HOMES	5	30	Inactive
BERRYESSA ESTATES (LBRID)	NAPA	474	Active
BERRYESSA HIGHLANDS	NAPA	715	Active
BERRYESSA PARK WATER CO	NAPA	80	Inactive
BERRYESSA PINES WATER SYSTEM	NAPA	261	Active
CALIFORNIA STATE DIVISION OF F	—	20	Inactive
CALISTOGA FARM WORKER CENTER	NAPA	65	Active
CALISTOGA, CITY OF	CALISTOGA	5,610	Active
CAPELL VALLEY ESTATES	STOCKTON	208	Active
CARNEROS INN	NAPA	30	Inactive
CHRISTIAN BROTHERS	ST HELENA	50	Inactive
CIRCLE OAKS WATER DISTRICT	NAPA	500	Active
ESPINOZA WATER SYSTEM	NAPA	30	Inactive
GLASS MT TRAILER PARK	DEER PARK	30	Inactive
HESS WINERY	NAPA	250	Active
HOWELL MOUNTAIN MUTUAL WATER COMPANY	ANGWIN	1,240	Active
LA TIERRA HEIGHTS MUTUAL	ANGWIN	67	Active
LAKE BERRYESSA MARINA RESORT - INACTIVE	NAPA	2,000	Inactive
LAKE BERRYESSA PARK	—	250	Inactive
LINDA FALLS TERRACE MUTUAL	ANGWIN	35	Active
LINDA VISTA MUTUAL WATER CO	ANGWIN	90	Active
LOKOYA MT LODGE	NAPA	50	Inactive
LOKOYA REDWOODS	NAPA	100	Inactive
MEYERS WATER CO.	NAPA	250	Active
MILTON ROAD WATER COMPANY	NAPA	44	Active
MONDAVI FARM WORKER CENTER	NAPA	66	Active
MT. GEORGE ESTATE	NAPA	190	Inactive
MUND S MOBILE HOME PARK	—	20	Inactive
NAPA MOBIL MANOR	—	255	Inactive
NAPA RIVER RANCH	NAPA	70	Active
NAPA-BERRYESSA RESORT	NAPA	1,150	Inactive
NAPA, CITY OF	NAPA	84,804	Active
PACIFIC UNION COLLEGE	ANGWIN	1,958	Active
PACIFIC UNION COLLEGE	ANGWIN	2,000	Inactive
PINE KNOLL MUTUAL WATER CO	ST HELENA	40	Inactive
PUEBLO TRAILER PARK - INACTIVE	NAPA	255	Inactive
R RANCH AT THE LAKE	NAPA	28	Active
RANCHO MONTICELLO RESORT	NAPA	2,900	Inactive
RANCHO MONTICELLO RESORT	Napa	0	Inactive
RIVER RANCH FARM WORKER CENTER	NAPA	66	Active
RUTHERFORD HILL	RUTHERFORD	50	Inactive
SAME	—	20	Inactive
SHARON S WATER SYSTEM	NAPA	45	Inactive
SHEVELAND APARTMENTS	58	1	Inactive
SILVERADO PINES MOBILE HOME	NAPA	255	Inactive
SILVERADO PINES MOBILEHOME	NAPA	200	Inactive
SOUTH SHORE RESORT	NAPA	1,000	Inactive
SPANISH FLAT CALIF WATER DIST	NAPA	700	Inactive
SPANISH FLAT RESORT	8	1,150	Inactive
SPANISH FLAT WATER DISTRICT	NAPA	230	Active
ST. HELENA, CITY OF	ST. HELENA	5,386	Active
TOWN OF YOUNTVILLE	YOUNTVILLE	2,787	Active
TUCKER ACRES MUTUAL WATER CO.	CALISTOGA	100	Inactive
TUCKER ACRES MUTUAL WATER CO.	CALISTOGA	200	Active
TURTLE ROCK WATER SUPPLY	NAPA	150	Inactive
VAILIMA ESTATES MUTUAL WATER	ST. HELENA	25	Active
VETERANS HOME OF CALIFORNIA	YOUNTVILLE	1,000	Active
VINE VILLAGE	—	3	Inactive
VINELAND MOBILEHOME PARK	ST HELENA	50	Inactive
WISPERING OAKS APTS.	—	30	Inactive