San Joaquin County, California Water Systems

San Joaquin County, California

141 community water systems on record — 94 active, 47 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 San Joaquin County, California

System name	City	Population served	Status
132 INVESTMENTS WATER SYSTEM	TRACY	252	Active
A1 WINSTONS MOBILE HOME PARK	STOCKTON	75	Active
ACAMPO WATER SYSTEM	STOCKTON	231	Active
AL FORNACIARI	STOCKTON	50	Inactive
ALMOND PARK WATER SYSTEM	STOCKTON	60	Active
ARBOR MOBILE HOME PARK WS	IRVINE	340	Active
ART/DORIS SCHNAIBLE	205	700	Inactive
B&G MOBILE HOME PARK LLC WS	LIVERMORE	50	Active
BANTA MUTUAL WATER CO #1	TRACY	81	Inactive
BANTA MUTUAL WATER CO #2	TRACY	42	Inactive
BANTA MUTUAL WATER CO #3	TRACY	0	Inactive
BEL AIR MOBILE ESTATE	STOCKTON	325	Active
BEN OSBURN	LODI	68	Inactive
BENTLEY TRAILER COURT	HOLLISTER	84	Inactive
BIG WHEEL MOBILE HOME PARK	STOCKTON	120	Active
BOBBY SMITH	STOCKTON	30	Inactive
CALIFORNIA WATER SERVICE - STOCKTON	SAN JOSE	176,266	Active
CARDOZA VILLA CORP	MANTECA	30	Active
CARIBOU MOBILE PARK PWS	STOCKTON	180	Active
CDCR CALIFORNIA HEALTH CARE FACILITY	STOCKTON	5,551	Active
CENTURY MOBILE HOME PARK	RIVERBANK	50	Active
CHERRY LANE TRAILER PARK	STOCKTON	100	Active
CITY OF LATHROP	LATHROP	35,080	Active
CITY OF MOUNTAIN HOUSE	MOUNTAIN HOUSE	24,948	Active
CITY OF STOCKTON	STOCKTON	191,302	Active
CLEMENTS WATER WORKS #43	STOCKTON	264	Active
CORRAL HOLLOW PWS	STOCKTON	145	Active
COUNTRY CLUB VISTA MUTUAL WATER CO	WOODBRIDGE	75	Active
COUNTRY MANOR MHP	VALLEY SPRINGS	75	Active
COUNTRY SQUIRE MOBILE ESTATES & WATER SY	OAKDALE	131	Active
CURRIER ESTATES WATER CORP	TRACY	148	Active
DAVID COMER	LODI	35	Inactive
DE VILLE APARTMENTS	FRENCH CAMP	110	Inactive
DEUEL VOCATIONAL INSTITUTION	TRACY	1,600	Inactive
DEUEL VOCATIONAL INSTITUTION	TRACY	3,271	Inactive
DEUEL VOCATIONAL INSTITUTION	TRACY	3,000	Inactive
DOUBLE L MOBILE ESTATES	LOCKEFORD	320	Active
EL RIO MOBILE HOME PARK	STOCKTON	60	Active
ELKHORN ESTATES WATER SYSTEM	STOCKTON	234	Active
ENCLAVE AT THE DELTA	STOCKTON	39	Active
ESCALON, CITY OF	ESCALON	7,429	Active
FAIROAKS PWS #44	STOCKTON	1,172	Active
FAIRWAY ESTATES	WOODBRIDGE	200	Inactive
FAIRWAY ESTATES PWS CSA-18	STOCKTON	149	Active
FARMINGTON WATER COMPANY	FARMINGTON	270	Active
FINNLEES TRAILER PARK	WOODLAND	55	Active
FREMONT ONE	STOCKTON	39	Active
FRESNO TRUCK LINES	FRENCH CAMP	44	Inactive
FULLER TRAILER PARK	LATHROP	80	Inactive
GAYLA MANOR PWS	STOCKTON	178	Active
GLENWOOD MOBILE HOME PARK	SAN RAMON	100	Active
HANOT FOUNDATION INC	LOCKEFORD	38	Active
HAVEN ACRES RIVER CLUB INC	LATHROP	100	Active
HAYNES BOARD & CARE HOME	LODI	41	Active
IL VINETO	HILLSBOROUGH	160	Active
ISLANDER MARINA	SACRAMENTO	150	Active
KING ISLAND TRAILER PARK WATER SYSTEM	STOCKTON	236	Active
LA SELVA BEACH GREENHOUSES INC	LA SELVA BEACH	40	Inactive
LA TORRES PARK	TRACY	40	Active
LATHROP SANDS TRAILER COURT	—	105	Inactive
LEISURE MANOR	STOCKTON	100	Inactive
LINDEN COUNTY WATER DISTRICT	LINDEN	1,784	Active
LITTLE POTATO SLOUGH MUTUAL	LODI	1,510	Active
LOCKEFORD COMMUNITY SERV. DIST.	LOCKEFORD	3,572	Active
LOCKEFORD MOBILE HOME PARK WTR SYS	CONCORD	123	Active
LODI HOMES	TRACY	39	Active
LODI LAKE MOBILE HOME PARK	SAN MARINO	104	Active
LODI, CITY OF	LODI	68,272	Active
MANTECA, CITY OF	MANTECA	84,928	Active
MAPACHE TRAILER PARK	CONCORD	275	Active
MARTINEZ APARTMENTS	FRENCH CAMP	26	Active
MAURLAND MANOR WATER SYSTEM	STOCKTON	92	Active
MIEKO'S PROPERTIES	ORINDA	102	Inactive
MOBILE VILLAS TRAILER PARK	STOCKTON	130	Active
MOKELUMNE ACRES	GE	400	Inactive
MOKELUMNE MOBILE SENIOR PARK	GALT	55	Active
MOKELUMNE VIEW	GE 95258	20	Inactive
MORADA ACRES WATER SYSTEM	STOCKTON	105	Active
MORADA ESTATES N PWS #46	STOCKTON	426	Active
MORADA ESTATES PWS	STOCKTON	290	Active
MORADA MANOR WATER SYSTEM	STOCKTON	112	Active
MOREHEAD PARK	GREENBRAE	300	Active
MOSSDALE MOBILE HOME PARK	MEADOW VISTA	100	Inactive
NEW HOPE LANDING GENERAL STORE	SACRAMENTO	125	Active
NORTHERN CALIF YOUTH CENTER	STOCKTON	495	Inactive
NORTHERN CALIF YOUTH CORR. CENTER	STOCKTON	6,000	Inactive
OAKWOOD LAKE MOBILE HOME PARK	NEVADA CITY	148	Inactive
OAKWOOD LAKE RESORT	MANTECA	501	Inactive
OAKWOOD LAKE WATER DISTRICT-SUBDIVISION	STOCKTON	1,479	Active
ORMONDE LABOR CAMP #65-288	TRACY	30	Inactive
PAR COUNTRY ESTATES CSA-16	STOCKTON	178	Active
POPLAR GROVE CABINS	MANTECA	28	Inactive
RANCHO SAN JOAQUIN WATER SYS	STOCKTON	172	Active
RIPON, CITY OF	RIPON	15,741	Active
RIVERSIDE MOBILE HOME PARK	VACAVILLE	55	Active
S J CO MAINTENANCE DISTRICT	STOCKTON	300	Inactive
SAHARA MOBILE COURT	PLEASANTON	300	Active
SAN JOAQUIN CO, DPT PUBLIC WKS	STOCKTON	400	Inactive
SAN JOAQUIN COUNTY	STOCKTON	300	Inactive
SAN JOAQUIN COUNTY - COLONIAL HEIGHTS	STOCKTON	1,841	Active
SAN JOAQUIN COUNTY - LINCOLN VILLAGE	STOCKTON	5,841	Active
SAN JOAQUIN COUNTY - THORNTON	STOCKTON	964	Active
SAN JOAQUIN COUNTY - WILKINSON MANOR	STOCKTON	851	Active
SAN JOAQUIN COUNTY-MOKELUMNE ACRES	STOCKTON	3,802	Active
SAN JOAQUIN COUNTY-RAYMUS VILLAGE	STOCKTON	1,086	Active
SAN JOAQUIN RIVER CLUB INC	TRACY	600	Active
SAN JOAQUIN WATER WORKS #2	STOCKTON	310	Active
SAN JUAN VISTA	STOCKTON	201	Active
SANTOS RANCH PWS #5-CSA #35	STOCKTON	320	Active
SHADED TERRACE PWS	STOCKTON	238	Active
SHADOW LAKE MOBILE HOME COMMUN	STOCKTON	0	Inactive
SHADY REST TRAILER COURT	DANVILLE	150	Active
SIDHU MOBILE PARK WATER SYSTEM	STOCKTON	75	Inactive
SPRING CREEK ESTATES PWS	STOCKTON	119	Active
STATE OF CALIFORNIA	STOCKTON	1,450	Inactive
STOCKTON / LODI RV PARK	LODI	200	Inactive
STOCKTON DEVELOPMENTAL CENTER	STOCKTON	1,200	Inactive
STOCKTON EAST WATER DISTRICT	STOCKTON	50	Active
STOCKTON STATE HOSPITAL	STOCKTON	25	Inactive
STOCKTON VERDE MOBILE HOME PARK	STOCKTON	711	Active
SUNNY ROAD WATER SYSTEM	EL MONTE	34	Active
SUNNYSIDE ESTATES WATER SYSTEM	STOCKTON	69	Active
TAHAMA VILLAGE MOBILE HOME PARK	OAKDALE	200	Active
THOMAS SHAFT WHOLESALE	BURLINGAME	1	Active
TOWER PARK MARINA	LODI	360	Inactive
TRACY, CITY OF	TRACY	96,609	Active
TWIN OAKS MOBILE PARK	STOCKTON	238	Active
UNIVERSITY OF PACIFIC	STOCKTON	6,800	Inactive
UNIVERSITY OF PACIFIC	STOCKTON	6,800	Inactive
UOP	STOCKTON	500	Inactive
V & P TRAILER COURT WATER SYSTEM	STOCKTON	35	Active
VILLA CEREZOS	LOS ALTOS	200	Active
VIRGINIA BECHTOLD	LODI	7	Inactive
WALNUT ACRES	STOCKTON	106	Active
WAYSIDE MOTEL APARTMENTS WTR SYS	STOCKTON	70	Active
WILKINSON MANOR A-ZONE PWS	STOCKTON	125	Active
WIMPYS MARINA	WALNUT GROVE	70	Inactive
WINE COUNTRY APARTMENTS	STOCKTON	40	Active
WOODBRIDGE MOBILE ESTATES	GARDEN GROVE	110	Inactive
WOODBRIDGE WELDING SHOP	WOODBRIDGE	6	Inactive
YAMADA LABOR CAMP #65-41	TRACY	1	Inactive