San Bernardino County, California Water Systems

San Bernardino County, California

242 community water systems on record — 147 active, 95 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 August 1, 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 Bernardino County, California

System name	Mailing city	Population served	Status
CHINO BASIN MWD	RANCHO CUCAMONGA	300,000	Inactive
SAN GABRIEL VALLEY WC - FONTANA	FONTANA	237,700	Active
SAN BERNARDINO CITY	SAN BERNARDINO	214,665	Active
CUCAMONGA VALLEY WATER DISTRICT	RANCHO CUCUAMONGA	211,069	Active
ONTARIO MUNICIPAL UTILITIES COMPANY	ONTARIO	185,010	Active
VICTORVILLE WATER DISTRICT	VICTORVILLE	135,983	Active
SAN BERNARDINO VALLEY WD	SAN BERNARDINO	109,608	Active
EAST VALLEY WATER DISTRICT	HIGHLAND	108,629	Active
WEST VALLEY WATER DISTRICT	RIALTO	104,498	Active
HESPERIA WD	HESPERIA	100,744	Active
CHINO, CITY OF	CHINO	86,435	Active
UPLAND, CITY OF	UPLAND	78,376	Active
REDLANDS CITY MUD-WATER DIV	REDLANDS	78,025	Active
CHINO HILLS, CITY OF	CHINO HILLS	76,414	Active
LIBERTY UTILITIES (AV RANCHOS) CORP.	DOWNEY	64,469	Active
MONTE VISTA WD	MONTCLAIR	56,017	Active
RIALTO, CITY OF	RIALTO	54,453	Active
YUCAIPA VALLEY WATER DISTRICT	YUCAIPA	52,010	Active
COLTON, CITY OF	COLTON	46,525	Active
ADELANTO, CITY OF	ADELANTO	39,930	Active
GOLDEN STATE WATER CO - BARSTOW	APPLE VALLEY	32,547	Active
HI DESERT WD	YUCCA VALLEY	26,411	Active
BIG BEAR LAKE DWP - BIG BEAR SYSTEM	BIG BEAR LAKE	26,132	Active
LOMA LINDA, CITY OF	LOMA LINDA	25,129	Active
PHELAN PINON HILLS CSD	PHELAN	24,285	Active
RIVERSIDE HIGHLAND WATER COMPANY	GRAND TERRACE	20,188	Active
TWENTYNINE PALMS WATER DISTRICT	TWENTYNINE PALMS	18,795	Active
USMC - 29 PALMS	TWENTYNINE PALMS	16,067	Active
US ARMY FORT IRWIN	FORT IRWIN	15,701	Active
LOMA LINDA UNIVERSITY	LOMA LINDA	15,368	Active
SBDNO COUNTY SERVICE AREA 64	SAN BERNARDINO	14,911	Active
MUSCOY MWC NO. 1	SAN BERNARDINO	13,000	Active
SBDNO COUNTY SERVICE AREA 70J	SAN BERNARDINO	12,843	Active
BIG BEAR CITY CSD	BIG BEAR CITY	12,738	Active
CRESTLINE VILLAGE CWD - DIVISION 10	CRESTLINE	11,650	Active
CALIFORNIA INSTITUTION FOR MEN	CHINO	10,667	Active
NEEDLES, CITY OF	NEEDLES	8,766	Active
WESTERN HEIGHTS WATER COMPANY	YUCAIPA	7,705	Active
YUCCA WATER COMPANY LTD	YUCCA VALLEY	7,500	Inactive
LAKE ARROWHEAD CSD	LAKE ARROWHEAD	7,038	Active
JOSHUA BASIN WATER DISTRICT	JOSHUA TREE	6,640	Active
HELENDALE COMMUNITY SERVICE DISTRICT	HELENDALE	6,347	Active
GOLDEN STATE WATER CO - APPLE VLY SOUTH	APPLE VALLEY	6,208	Active
GLEN HELEN WATER SYSTEM	SAN BERNARDINO	5,900	Active
RUNNING SPRINGS WATER DISTRICT	RUNNING SPRINGS	5,268	Active
SAN BERNARDINO MUN WAT UT CORP	SAN BERNARDINO	4,929	Inactive
CALIFORNIA INSTITUTION FOR MEN	CHINO	4,500	Inactive
CALIFORNIA INSTITUTION FOR MEN	CHINO	4,500	Inactive
GOLDEN STATE WATER CO - WRIGHTWOOD	APPLE VALLEY	4,177	Active
SHEEP CREEK WATER COMPANY	PHELAN	4,002	Active
BIGHORN - DESERT VIEW WATER AGENCY	YUCCA VALLEY	3,916	Active
GILBERT STREET COMPLEX	SAN BERNARDINO	3,833	Active
SAN ANTONIO WATER COMPANY	UPLAND	3,441	Active
DWP - SUGARLOAF/ERWIN LAKE	BIG BEAR LAKE	3,422	Inactive
CALIFORNIA REHABILITATION CENT	CORONA	3,400	Inactive
MARYGOLD MWC	BLOOMINGTON	3,055	Active
HIGH DESERT DETENTION CENTER	ADELANTO	3,035	Active
GREEN VALLEY MWC	GREEN VALLEY LAKE	2,993	Active
ARROWHEAD VILLAS MUTUAL SERVICE COMPANY	SKYFOREST	2,654	Active
ALPINE WATER USERS ASSOCIATION	TWIN PEAKS	2,534	Active
DESERT VIEW CWD	LANDERS	2,500	Inactive
PATTON STATE HOSPITAL INACTIVATED 100709	Patton	2,500	Inactive
VALLEY OF ENCHANTMENT MWC	CRESTLINE	2,471	Active
CEDARPINES PARK MWC	CEDARPINES PARK	2,458	Active
TERRACE WATER COMPANY	COLTON	2,400	Active
CLAWA	CRESTLINE	2,320	Active
THUNDERBIRD CWD	APPLE VALLEY	2,098	Active
GOLDEN STATE WATER CO - APPLE VLY NORTH	APPLE VALLEY	2,086	Active
ARROWBEAR PARK CWD	ARROWBEAR LAKE	1,856	Active
SEARLES VALLEY MINERALS OPERATIONS INC	TRONA	1,818	Active
YOUTH TRAINING SCHOOL	ONTARIO	1,800	Inactive
YOUTH TRAINING SCHOOL	ONTARIO	1,800	Inactive
GOLDEN STATE WATER CO - MORONGO DEL SUR	APPLE VALLEY	1,717	Active
MT BALDY HOMEOWNERS ASSN.	MT. BALDY	1,700	Active
DEVORE WC	DEVORE	1,574	Active
MARIANA RANCHOS CWD	APPLE VALLEY	1,502	Active
BASELINE GARDENS MWC INACTIVATED 071614	SAN BERNARDINO	1,300	Inactive
DWP - FAWNSKIN	BIG BEAR LAKE	1,271	Active
SBDNO COUNTY SERVICE AREA 70 CEDAR GLEN	SAN BERNARDINO	1,240	Active
PATTON STATE HOSPITAL	PATTON	1,200	Inactive
CALIFORNIA INSTITUTION FOR WOMEN	CORONA	1,195	Active
USMC NEBO (BARSTOW)	BARSTOW	1,126	Active
BDVWA - GOAT MOUNTAIN ID	YUCCA VALLEY	1,118	Active
CALIFORNIA INSTITUTION	FRONTERA	1,075	Inactive
CALIFORNIA INSTITUTION FOR WOM	FRONTERA	1,075	Inactive
BARTON FLATS WATER SYSTEM	ANGELUS OAKS	1,070	Active
FALLSVALE SERVICE COMPANY	FOREST FALLS	1,046	Active
BAKER COMMUNITY SERVICES DISTRICT	BAKER	1,000	Active
APPLE VALLEY HEIGHTS CWD	APPLE VALLEY	983	Active
LIBERTY -YERMO	DOWNEY	861	Active
JUNIPER RIVIERA CWD	APPLE VALLEY	858	Active
DEER LODGE WATER SYSTEM	LAKE ARROWHEAD	845	Active
LACSD - RIMFOREST	LAKE ARROWHEAD	817	Active
APPLE VALLEY FOOTHILL CWD	APPLE VALLEY	811	Active
DAGGETT COMM SVCS DIST	DAGGETT	795	Active
JUBILEE MWC	LUCERNE VALLEY	782	Active
RANCHO DEL LAGO	APPLE VALLEY	711	Inactive
SAMOA VILLAGE MOBILE HOME EST	ONTARIO	700	Inactive
VALLEY VIEW PARK MUTUAL WATER	CRESTLINE	676	Inactive
EAST WOOD FARMS CWU	Redlands	665	Inactive
CENTER WATER CO	LUCERNE VALLEY	662	Active
SOUTH SAN BERNARDINO WATER DST	SAN BERNARDINO	633	Inactive
MP MINE OPERATIONS LLC	MOUNTAIN PASS	626	Active
CSA 70 W-3 HACIENDA	SAN BERNARDINO	611	Active
SNOWCREST HEIGHTS IMP ASSOC	MOUNT BALDY	600	Active
SOUTH SAN BERNARDINO-NORTH	SAN BERNARDINO	600	Inactive
GOLDEN STATE WATER CO - LUCERNE	APPLE VALLEY	586	Active
OAK GLEN RETREAT	YORBA LINDA	576	Active
Unnamed system (CA3600163)	ADELANTO	564	Inactive
VAN LOON MUTUAL WATER COMPANY	SAN BERNARDINO	542	Inactive
PALMS RIVER RESORT	NEEDLES	531	Active
CSA 42 ORO GRANDE	SAN BERNARDINO	529	Active
BALDY MESA COUNTY	VICTORVILLE	518	Inactive
KNOLL ENTERPRISES	LUDLOW	500	Active
VALLEY VIEW PARK MWC	CRESTLINE	499	Active
SKY FOREST MWC	SKY FOREST	492	Active
RANCHERITOS MWC	APPLE VALLEY	487	Active
LYTLE SPRINGS WC	LYTLE CREEK	475	Active
CSA 70 W-4 PIONEERTOWN	SAN BERNARDINO	470	Active
GLEN MARTIN MWC	ANGELUS OAKS	450	Active
SMITHSON SPRINGS WATER CO INC	PINON HILLS	441	Inactive
LANKERSHIM MUTUAL WELL	HIGHLAND	438	Inactive
VALLEY FARMS MUTUAL WATER CO	SAN BERNARDINO	424	Inactive
ARROWHEAD HIGHLAND MUTUAL	LAKE GREGORY	420	Inactive
FOREST PARK MWC	—	406	Active
SAN BERNARDINO CO WATER WORKS	CARBON CANYON	396	Inactive
STRAWBERRY LODGE MWC	TWIN PEAKS	381	Active
GOLDEN STATE WATER MORONGO DELNORTE	APPLE VALLEY	373	Active
SMILEY PARK COUNTRY CLUB	RUNNING SPRINGS	370	Active
AGUA FRIA MSC	BLUE JAY	368	Inactive
CLAWA LAKE ARROWHEAD CREST EST	CREST PARK	368	Inactive
SO CAL WATER CO VICTORVILLE 6	LUCERNE VALLEY	368	Inactive
HAVASU WC	HAVASU LAKE	361	Inactive
Vali-Hi Mobile Home Park	Hesperia	360	Inactive
OLIVE DELL RANCH	COLTON	350	Active
RIVER SHORE ESTATES-BIA	EARP	340	Inactive
BERMUDA PALMS - BIA	EARP	333	Inactive
DESERT SPRINGS MWC	LUCERNE VALLEY	325	Active
MILL CREEK MSC	MENTONE	315	Active
Golden Pond RV/M Overland	ADELANTO	308	Inactive
APPLE VALLEY VIEW MWC	APPLE VALLEY	303	Active
BIG PINE TRACT	YUCAIPA	300	Active
CSA 70-F MORONGO	SAN BERNARDINO	300	Active
RIVERVIEW TRAILER PARK-BIA	EARP	298	Inactive
RANCHERITOS #2	APPLE VALLEY	291	Active
MOSS MOBILE MANOR	LUCERNE VALLEY	290	Active
WHEEL-ER INN TLR PARK-BIA	EARP	277	Inactive
HAVASU PALMS INC-BIA	PARKER	273	Inactive
NAVAJO MWC	APPLE VALLEY	264	Active
BAR H MWC	LUCERNE VALLEY	260	Active
LAKE JODIE WATER SYSTEM	WEST HOLLYHOOD	250	Active
CRESTLINE MOUNTAIN PARK	CRESTLINE	245	Inactive
SULLIVAN MUTUAL WATER COMPANY	COLTON	245	Inactive
DEPARTMENT OF WATER AND POWER	BIG BEAR LAKE	239	Active
DOGWOOD BLUE JAY CYN IMP	BLUE JAY	232	Active
LUCERNE VALLEY MWC	LUCERNE VALLEY	228	Active
LUCERNE VISTA MWC	LUCERNE VALLEY	224	Active
IRONWOOD CAMP	NEWBERRY SPRINGS	210	Active
SO CAL WATER CO VICTORVILLE 1	HESPERIA	203	Inactive
GORDON ACRES WATER CO	LUCERNE VALLEY	200	Active
CRYSTAL LAKE PROPERTY OWNERS	YERMO	186	Active
SO CAL WATER CO VICTORVILLE 5	APPLE VALLEY	182	Inactive
APPLE VALLEY VILLAGE MHE	YORBA LINDA	180	Active
OAK GLEN DOMESTIC WATER	HEMET	180	Active
GREEN VALLEY PARK MWC	GREEN VALLEY CREE	178	Inactive
RIVER RANCH MHP	VICTORVILLE	176	Active
ORO GRANDE APARTMENTS	—	165	Inactive
CLAWA HORSEHOE BEND CLUB FSSUP	ARROWHEAD HIGHLAN	161	Inactive
APPLE VALLEY WATER RESOURCES	APPLE VALLEY	158	Inactive
LIBERTY-BELLVIEW HEIGHTS	DOWNEY	155	Active
BEAR VALLEY MHP	APPLE VALLEY	150	Active
CALICO LAKE HOMEOWNERS	HESPERIA	150	Active
DESERT DAWN MWC	LUCERNE VALLEY	150	Active
ROADRUNNER MHP	TUSTIN	150	Inactive
LAKEVIEW WATER & IMPROV ASSN	BIG BEAR	147	Inactive
HAVASU WATER COMPNAY	HAVASU LAKE	140	Inactive
MWD OF SO CAL GENE PLANT	LA VERNE	135	Active
CLAWA BLUE JAY RESORT SYSTEM	BLUE JAY	133	Inactive
BAR-LEN MWC	BARSTOW	126	Active
CHEMHUEVI INDIAN TRIBE	HAVASU LAKE	123	Inactive
GOLDEN STATE WATER DESERT VIEW	APPLE VALLEY	120	Active
BURNT MILL CANYON MUTUAL WATER	LAKE ARROWHEAD	119	Inactive
SAN ANTONIO CANYON MSC	MT. BALDY	119	Active
HI DESERT MWC	BARSTOW	112	Active
PARADISE MOBILE ESTATES	SAN JUAN CAPISTRANO	106	Active
UPPER LITTLE BEAR MOUNTAIN CLUB	BLUE JAY	101	Active
JIMMIE D BEAVER	ALTA LOMA	100	Inactive
PILOT ROCK CONSERVATION CAMP	CRESTLINE	100	Inactive
PILOT ROCK CONSERVATION CAMP	CRESTLINE	100	Inactive
SAN BERNARDINO CO SERVICE AREA	VICTORVILLE	100	Inactive
INSLEE'S TRAILER PARK	LUCERNE VALLEY	95	Inactive
WEST END MWC	LUCERNE VALLEY	90	Active
CHAMISAL MWC	ADELANTO	84	Active
CLIFTON HEIGHTS WATER & LAND	VLY OF ENCHANTMNT	84	Inactive
EAST COLTON HEIGHT	COLTON	84	Inactive
CDF - OAK GLEN CONSERVATION CAMP	YUCAIPA	83	Active
CLAWA GREAT VIEW MWC FSSUP	LAKE GREGORY	80	Inactive
RIVER LODGE TOO-BLM	PARKER DAM	77	Inactive
ROCKY COMFORT MUTUAL WATER CO	MENTONE	71	Active
BURNT MILL HEIGHTS WATER	LAKE ARROWHEAD	66	Inactive

Showing the 200 largest of 242 systems on record, by population served. Browse by county above for the full list — every system has its own page, and all of them are in the sitemap.