Tuolumne County, California Water Systems

Tuolumne County, California

103 community water systems on record — 49 active, 54 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 Tuolumne County, California

System name	City	Population served	Status
49ER TRAILER RANCH	COLUMBIA	115	Active
A.C. STILL	SONORA	119	Inactive
A.C. STILL	SONORA	350	Inactive
ALPINE ACRES MUTUAL WATER CO	SOULSBYVILLE	195	Active
BELLEVIEW OAKS MUTUAL WATER CO	SONORA	468	Active
BLUEBELL VALLEY MWC	STANDARD	282	Active
CAL FIRE BASELINE CONSERVATION CAMP	JAMESTOWN	150	Active
CARL ANDERSON	SOULSBYVILLE	35	Inactive
CARL MATHESON	JAMESTOWN	25	Inactive
CASCADE ESTATES	LARKSPUR	316	Active
CDCR - SIERRA CONSERVATION CENTER	JAMESTOWN	3,571	Active
COLD SPRINGS WATER CO	COLD SPRINGS	1,771	Active
COLUMBIA HILLS APARTMENTS	SONORA	4	Inactive
COLUMBIA MOBILE HOME PARK	NEWPORT BEACH	89	Active
DEAN TURNER	SONORA	250	Inactive
DEL ORO WATER COMPANY - STRAWBERRY DIV.	CHICO	1,295	Active
DEPT OF CORRECTIONS	JAMESTOWN	85	Inactive
DON PEDRO REC AG:FLEM.MEADOWS	LA GRANGE	1,041	Active
GOLD RUSH MOBILE HOME PARK	SAN JUAN CAPISTRANO	67	Active
GOLDEN SIERRA ESTATES_FKA MOTHER LODE	SONORA	210	Active
GROVELAND COMMUNITY SERV DIST	GROVELAND	3,400	Active
HIDDEN VALLEY TRAILER PARK, INC	—	23	Inactive
LAKE DON PEDRO CSD	LA GRANGE	3,240	Active
LAZY Z MOBILE PARK	—	63	Inactive
LEISURE PINES MUTUAL WATER CO	TWAIN HARTE	340	Active
LILAC TERRACE WATER COMPANY	RTE	49	Inactive
LONG BARN PROPERTY OWNERS	LONG BARN	97	Active
LONG BARN U.S.F. STATION	—	32	Inactive
MEADOWBROOK PARK IMP ASSOC	TWAIN HARTE	154	Inactive
MI WUK HEIGHTS MWC	MI WUK VILLAGE	445	Active
MI WUK VILLAGE MUT WTR CO	MI WUK VILLAGE	2,163	Active
MONO VILLAGE WATER DISTRICT	SONORA	525	Inactive
MONO VISTA RANCH MHP	RANCHO CUCAMONGA	105	Active
MONO VISTA WATER COMPANY	—	133	Inactive
MULLER MUTUAL WATER COMPANY	TUOLUMNE	154	Active
NORTH AIRPORT WATER ASSOCIATIO	—	17	Inactive
OAK RIDGE RANCH	SONORA	30	Inactive
OAKHAVEN	SONORA	0	Inactive
PEPPERMINT CREEK MHP	STOCKTON	280	Active
PHOENIX LAKE ESTATES CC MWC	SONORA	1,168	Active
PINECREST PERMITTEES ASSN	PINECREST	1,298	Active
PONDEROSA MOBILE HOME PARK	SONORA	52	Active
RAMBLING HILLS ESTATES	GUERNEVILLE	78	Active
RANCHO POQUITOS MWC	SONORA	211	Inactive
RAWHIDE MUTUAL WATER COMPANY	JAMESTOWN	269	Active
RAY PERRY	SOULSBYVILLE	120	Inactive
ROBERTS MOTEL & APARTMENTS	—	28	Inactive
SIERRA CONSERVATION CENTER	JAMES TOWN	1,500	Inactive
SIERRA CONSERVATION CENTER	JAMESTOWN	1,500	Inactive
SIERRA PARK WATER COMPANY INC.	MI-WUK VILLAGE	400	Active
SIERRA TRAILER PARK	—	21	Inactive
SIERRA TWAIN HARTE MHP	JAMESTOWN	129	Active
SIERRA VILLAGE	SONORA	91	Inactive
SIERRA VILLAGE MOBILE HOME PARK	MI WUK VILLAGE	22	Active
SIERRA VILLAGE MUTUAL WATER CO	TWAIN HARTE	361	Active
SLIDE INN SNOWBOWL WATER CO	SONORA	417	Active
SNIDER LUMBER PRODUCTS CO	CHINESE CAMP	25	Inactive
SNO BOWL WATER CO	SONORA	91	Inactive
SONORA ESTATES MOBILE HOME PARK	YORBA LINDA	235	Active
SONORA MEADOWS MUTUAL WTR CO	SONORA	1,123	Active
SONORA WATER RESOURCES, INC	CLAREMONT	1,154	Active
SOULSBYVILLE WATER WEST	—	14	Inactive
STAGE STOP STORE & SANDWICH	SONORA	25	Inactive
STONY BROOK MOBILE HOME PARK	—	14	Inactive
SUGAR PINE RV RESORT	TWAIN HARTE	219	Active
SYLVAN COURT MOBILE HOME PARK	—	20	Inactive
T. BART MOBILE HOME PARK	—	2	Inactive
TAMARRON MOBILE HOME PARK	NEWPORT BEACH	225	Active
TERRACED MOBILE HOME PARK	SONORA	50	Inactive
TERRACED MOBILE HOME PARK	FRESNO	60	Inactive
TUD - MONO VILLAGE WATER SYSTEM	SONORA	640	Inactive
TUD - BIG HILL WATER SYSTEM	SONORA	531	Inactive
TUD - CEDAR RIDGE WATER SYSTEM	SONORA	1,879	Inactive
TUD - COLUMBIA WATER SYSTEM	SONORA	5,463	Active
TUD - CRYSTAL FALLS WATER SYSTEM	SONORA	5,393	Inactive
TUD - GIBBS RANCH WATER SYSTEM	SONORA	0	Inactive
TUD - MONTE GRANDE WATER SYSTEM	SONORA	548	Inactive
TUD - PHOENIX LAKE PARK	SONORA	157	Inactive
TUD - PONDEROSA	SONORA	1,767	Active
TUD - SONORA/JAMESTOWN WATER SYSTEM	SONORA	11,054	Active
TUD - SUGAR PINE WATER SYSTEM	SONORA	0	Inactive
TUD - TUOLUMNE WATER SYSTEM	SONORA	1,761	Active
TUD - UPPER BASIN WATER SYSTEM	SONORA	13,280	Active
TUD-APPLE VALLEY ESTATES	SONORA	826	Active
TUD-CUESTA CENTER-LAMBERT LAKES	SONORA	533	Inactive
TUD-CUESTA SERENA	SONORA	0	Inactive
TUD-CURTIS CREEK RANCHES	Sonora	0	Inactive
TUD-PEACEFUL PINES WATER SYSTEM	SONORA	92	Active
TUD-SCENIC VIEW/SCENIC BROOK	SONORA	0	Inactive
TUD-WARDS FERRY RANCHES	SONORA	62	Active
TUOLUMNE REGIONAL WATER DIST.	SONORA	175	Inactive
TWAIN HARTE COMMUNITY SERVICES DISTRICT	TWAIN HARTE	2,378	Active
TWAIN HARTE VALLEY MWC	TWAIN HARTE	202	Active
TWIN PINES MOBILE HOME PARK	SANTA BARBARA	50	Inactive
VOLPONI ACRES MUTUAL WATER CO	JAMESTOWN	224	Inactive
W.J. COVINGTON	COLUMBIA	25	Inactive
WATERFALL LODGE IMPROVEMENT CO	TWAIN HARTE	210	Inactive
WIGWAM ROAD APARTMENTS	MILLBRAE	25	Inactive
WM. & FRANCES BREWER	SONORA	157	Inactive
WOODS CREEK TRAILER PARK	—	4	Inactive
YOSEMITE HIGHLANDS WATER CO	LANDS SUBDIVISION	105	Inactive
YOSEMITE NPS-HODGDON MEADOW	YOSEMITE NP	51	Active
YOSEMITE VISTA ESTATES	GROVELAND	85	Active