Lake County, California Water Systems

Lake County, California

108 community water systems on record — 44 active, 64 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 Lake County, California

System name	City	Population served	Status
ADAMS SPRINGS WATER DISTRICT	COBB	99	Inactive
ALTERRA MWC	LAKEPORT	0	Inactive
ANDERSON SPRINGS CSD	MIDDLETOWN	373	Active
AUSTIN'S WATER SYSTEM	CLEARLAKE	0	Inactive
BAYCLIFF WATER	LOWER LAKE	70	Active
BELLA LAGO MOBILE HOME PARK	SAN JOSE	152	Active
BLUE LAKES IMPROVEMENT CLUB	UPPER LAKE	90	Active
BLUE LAKES MOBILE HOME PARK	SAN MATEO	32	Active
BLUE LAKES VILLAGE	SANTA ROSA	65	Active
BONANZA SPRINGS WATER CO	LOWER LAKE	0	Inactive
BUCKINGHAM PARK WATER DISTRICT	KELSEYVILLE	1,521	Active
CACHE CREEK MOBILE HOME PARK	REDWOOD VALLEY	150	Inactive
CAL 20 VILLAGE AND MEADOW POINTE PARK	STOCKTON	255	Active
CALLAYOMI COUNTY WATER DISTRICT	MIDDLETOWN	1,598	Active
CDF-KONOCTI CONSERVATION CAMP NO. 27	LOWER LAKE	100	Active
CLEAR WATER MUTUAL WATER COMPANY	KELSEYVILLE	252	Active
CLEARLAKE OAKS COUNTY WATER DISTRICT	CLEARLAKE OAK	2,359	Active
COBB AREA COUNTY WATER DISTRICT	COBB	3,515	Active
COBB AREA CWD - BONANZA SPRINGS	COBB	594	Inactive
COBB AREA CWD - BRANDING IRON	COBB	90	Inactive
COBB AREA CWD - HILL NINE AND TEN	COBB	60	Inactive
COBB AREA CWD - MT. HANNAH	COBB	129	Inactive
COBB AREA CWD - STARVIEW	COBB	247	Inactive
COBB MOUNTAIN WATER COMPANY	COBB	76	Inactive
CORINTHIAN BAY MUTUAL WATER COMPANY	LAKEPORT	150	Active
COUNTRYWOOD MOBILE HOME PARK	LAKEPORT	0	Inactive
COVE RESORT APTS	LAKEPORT	50	Inactive
DWR BOTTLE ROCK RD POWER PLANT	COBB	0	Inactive
EDGEWATER RESORT & RV PARK	KELSEYVILLE	0	Inactive
EL DORADO ID - MONTE VISTA	PLACERVILLE	120	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	21,573	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	10	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	3,353	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	7,798	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	750	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	25	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	2,500	Inactive
EL DORADO IRRIGATION DISTRICT	PLACERVILLE	6,366	Inactive
FINLEY COUNTY SERVICE AREA #6	KELSEYVILLE	300	Inactive
GEORGETOWN DIVIDE PUD	GEORGETOWN	1,480	Inactive
GEORGETOWN DIVIDE PUD	GEORGETOWN	1,853	Inactive
GLENHAVEN MUTUAL WATER COMPANY	GLENHAVEN	300	Active
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM	RANCHO CORDOVA	4,644	Active
GOLDEN STATE WATER COMPANY - SOUTH SHORE	RANCHO CORDOVA	30	Active
HARBOR VIEW MUTUAL WATER COMPANY	KELSEYVILLE	550	Active
HIDDEN VALLEY LAKE CSD	HIDDEN VALLEY LAKE	6,235	Active
HIGHLANDS MUTUAL WATER COMPANY	CLEARLAKE	7,772	Active
HOHAPE MUTUAL WATER COMPANY	KELSEYVILLE	0	Inactive
INNISFREE WATER COMPANY	KELSEYVILLE	56	Active
JIM'S SODA BAY RESORT	KELSEYVILLE	0	Inactive
KELSEYVILLE CO WATERWORKS DISTRICT 3	LAKEPORT	4,102	Active
KIM CLYMIRE	LAKEPORT	0	Inactive
KONOCTI CONSERVATION CAMP	LOWER LAKE	109	Inactive
KONOCTI CONSERVATION CAMP	LOWER LAKE	109	Inactive
KONOCTI COUNTY WATER DISTRICT	CLEARLAKE	5,928	Active
KONOCTI SHORES	ORINDA	277	Active
LAKE COUNTY CSA 13 - KONO TAYEE	LAKEPORT	449	Active
LAKE COUNTY CSA 16 - PARADISE VALLEY	LAKEPORT	133	Inactive
LAKE COUNTY CSA 2 - SPRING VALLEY	LAKEPORT	1,531	Active
LAKE COUNTY CSA 20 - SODA BAY	LAKEPORT	2,003	Active
LAKE COUNTY CSA 21 - NORTH LAKEPORT	LAKEPORT	4,046	Active
LAKE COUNTY CSA 6 - FINLEY	LAKEPORT	590	Inactive
LAKE COUNTY JUVENILE HOME	LAKEPORT	50	Inactive
LAKEPORT LAGOON MHP	PEBBLE BEACH	0	Inactive
LAKEPORT, CITY OF	LAKEPORT	4,762	Active
LAKESHORE ESTATES MHP	SAN FRANCISCO	0	Inactive
LAKESIDE HEIGHTS MWC	LAKEPORT	0	Inactive
LAKESIDE VILLAGE MHP	LAKEPORT	90	Inactive
LAKEVIEW ESTATES MUTUAL WATER	FINLEY	13	Inactive
LAKEWOOD PARK MUTUAL	KELSEYVILLE	0	Inactive
LAZY S MOBILE RANCH	MIDDLETOWN	73	Active
LOCH LOMOND MUTUAL WATER CO	COBB	693	Active
LOOKOUT MTN MUTUAL WATER CO	LAKEPORT	0	Inactive
LOWER LAKE COUNTY WATER DISTRICT	LOWER LAKE	1,326	Active
LOWER LAKE CWD - RANCHO SENDERO	LOWER LAKE	0	Inactive
LUCERNE WATER CO. - CAL WATER SERVICE	SAN JOSE	2,129	Active
MOUNTAIN OF ATTENTION WATER	MIDDLETOWN	26	Active
MT. KONOCTI MUTUAL WATER COMPANY	KELSEYVILLE	4,360	Active
NICE MUTUAL WATER COMPANY	NICE	2,929	Active
NORTHPORT TRAILER RESORT	LAKEPORT	0	Inactive
OAK CREST MANOR	WILLITS	50	Inactive
OAKRIDGE WATER SYSTEM	LAKEPORT	75	Inactive
PARKLANDS MUTUAL WATER CO	KELSEYVILLE	80	Inactive
PERKS MOBILE HOME ESTATES	LAKEPORT	0	Inactive
PIER 1900 HOMEOWNER'S ASSOCIATION	LAKEPORT	152	Active
PINE GROVE WATER SYSTEM	COBB	352	Inactive
RANCHO SENDERO SUBDIV WATER CO	SAN MARTIN	70	Inactive
ROBIN HILL MWC	LAKEPORT	0	Inactive
ROZIER CONLEY WATER COMPANY	LAKEPORT	0	Inactive
RUNNING SPRINGS MOBILE HOME PARK	LAKEPORT	0	Inactive
SANDY COVE MUTUAL WATER CO	VALLEJO	0	Inactive
SODA BAY SPRINGS MWC	KELSEYVILLE	0	Inactive
SPRING VALLEY LAKES	KELSEYVILLE	176	Inactive
STARK DUPLEXES	MONTARA	0	Inactive
SUGAR BOWL WATER ASSOCIATION	LAKEPORT	0	Inactive
SUNRISE SHORE MUTUAL WATER COMPANY	LOWER LAKE	83	Active
SUNRISE VISTA WATER	COBB	0	Inactive
TWIN CREEKS MOBILE AND RV VILLAGE	IRVINE	50	Active
UPPER LAKE COUNTY WATER DISTRICT	UPPER LAKE	989	Active
VILLA BLUE ESTATES WATER DISTRICT	UPPER LAKE	60	Active
WALNUT BEACH	LAKEPORT	0	Inactive
WALNUT COVE MOBILE ESTATES	KELSEYVILLE	200	Active
WESTERN HILLS WATER	LAKEPORT	0	Inactive
WESTERN MWC	LAKEPORT	0	Inactive
WESTLAKE MHP	LAKEPORT	0	Inactive
WESTWIND MOBILE HOME PARK	LAKE OSWEGO	104	Active
WHISPERING PINES WATER CO.	MIDDLETOWN	0	Inactive
WINDFLOWER POINT MUTUAL WATER COMPANY	SOUTH SAN FRANCISCO	25	Active