California utilities with moderately hard water.

61 to 120 mg/L (3.6 to 7 grains per gallon). 414 utilities serving 465,877 people as they report it, largest first.

201 to 300 of 414, by people served

California utilities with moderately hard water, 201 to 300, 201 to 300
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Dune 3 Mutual Water Company, LLC	Morro Bay	119	120	7
Spring Creek Estates PWS	Stockton	119	93	5.4
Laguna del Sol Inc	Wilton	118	93	5.4
Fcsa 14 - Belmont Manor	Fresno	115	105	6.1
Dingerville USA Park	Yorba Linda	114	94	5.5
Brand Water Company	Oakland	112	74	4.3
Crystal Caves MHP	Placerville	112	120	7
Twin Cypress Mobile Home Park	Oakdale	112	78	4.6
Del Rio East HOA Water System	Stockton	110	82	4.8
Floriston Water System	Floriston	110	73	4.2
Del Oro WC - Larkspur Meadows	Chico	109	89	5.2
Shasta Co CSA # 13 Alpine Meadows	Redding	109	98	5.7
Holly Hills MWC	Salinas	108	81	4.7
Valley Oaks MHP WS	Lockwood	108	110	6.4
Sunnyside Convalescent Hosp	Fresno	107	86	5
Kings River Estates Mutual Water Company	Kingsburg	106	83	4.9
Oak Heights W & R Co Inc	Salinas	105	106	6.2
St. Clair Ranchos Mutual Water Co.	Bakersfield	105	72	4.2
Mountain View Duplexes	Kingsburg	103	118	6.9
Cdf - Konocti Conservation Camp No. 27	Lower Lake	100	93	5.4
Laguna Mountain Mutual Water Co.	MT Laguna	100	110	6.4
MD 43 Miami Creek Knolls	Madera	100	77	4.5
Oasis Property Owners Association	Bakersfield	100	102	6
Sa 14 Chuk Chanse Subdivision	Madera	100	64	3.7
Spindrift Marina	St. Helena	100	71	4.1
Bend Mobilehome & Rv Park	Red Bluff	99	90	5.3
Del Oro Water Company - Buzztail Dist.	Chico	99	104	6.1
Long Barn Property Owners	Long Barn	97	98	5.7
Five Points Ranch	Five Points	95	89	5.2
Liberty Park Water Association	Huntington Beach	95	110	6.4
Shady Grove Mobile Home Park, LLC	Ventura	95	114	6.6
Summerhill MHP WS	Santa Cruz	95	97	5.7
Tucker Oaks East Water District	Anderson	95	76	4.5
San Miguel WS #22	Salinas	93	90	5.3
Cal Am Water Company - Ralph Lane	Pacific Grove	92	108	6.3
Cortland Pines Mutual Water Co	Shingletown	92	68	4
Oak Manor WS	Salinas	92	112	6.5
Rapid River Mobilehome Park	Moraga	92	95	5.5
Tud - Peaceful Pines Water System	Sonora	92	84	4.9
Blue Spruce Mobile Home Park	Sacramento	90	78	4.6
Lake Shasta Pines Rv Park & Campground	Dunsmuir	90	76	4.4
Magnolia Mutual Water	Courtland	90	81	4.7
Merry Mountain Mutual	Clipper Mills	90	84	4.9
Rawson Creek Mutual Water Company	Bishop	90	92	5.4
Saddleback Mutual Water Co.	Cottonwood	90	96	5.6
Village Green	Anderson	90	68	4
Aerial Acres Water Company, Inc.	North Edwards	87	99	5.8
East Inyokern Mutual Water	Inyokern	87	103	6
River Breeze Mobile Home Park	Sacramento	87	109	6.4
Riverbend Mobile Home & Rv Park	Granite Bay	87	103	6
Lassen View Water District	Red Bluff	85	82	4.8
Modern Village MWC	Red Bluff	85	96	5.6
Orleans Mutual Water Company	Orleans	85	85	5
Truckee - Donner PUD - Hirschdale	Truckee	85	88	5.1
MD 36 Eastin Arcola	Madera	84	83	4.8
Alleghany County W.D.	Alleghany	82	79	4.6
Austin Acres Mutual Water Company	Duncans Mills	82	120	7
Cc Farms, LLC.	Livermore	82	96	5.6
Wendell Lane Mutual Water Company	Sebastopol	82	97	5.7
Blue Oak Terrace Mutual	Chico	81	89	5.2
Hidden Valley WA	Salinas	81	78	4.5
Psmcsd - Langley/Valle Pacifico WS	Royal Oaks	81	92	5.4
Baldy Mountain Ranch	Mountain Center	80	80	4.7
John Hovannisian Water System	Fresno	80	65	3.8
Laguna Negra Mutual Water Co.	Arroyo Grande	80	72	4.2
Live Oak Acres MWC Inc.	Red Bluff	80	100	5.8
Pineview Mobile Home Park	Cedar Glen	80	80	4.7
Sacramento River Rv Park	Eugene	80	95	5.6
Sobre Vista Water Company	El Verano	80	115	6.7
Uplands of the Kern Mutual Water Company	Bakersfield	80	96	5.6
Owens Peak West	Inyokern	79	115	6.7
Terra Linda Farms	Riverdale	79	88	5.1
Strawberry Rd WS #06	Watsonville	78	83	4.9
Mountain Center Cafe	Idyllwild	77	79	4.6
Britz/Five Points	Fresno	76	110	6.4
Auburn Ridge Woods	Sacramento	75	106	6.2
Briceland C.S.D.	Garberville	75	98	5.7
Butte City Community S.D.	Butte City	75	96	5.6
Candlelight Village Mutual Water Co.	Somerset	75	95	5.5
Country Club Vista Mutual Water Co	Woodbridge	75	64	3.7
Gold Hill Mobilehome Park	Roseville	75	119	6.9
Harbor View WA	Salinas	75	67	3.9
Harris Farms South 101 - 144	Coalinga	75	110	6.4
Howell'S Lakeside Water Co.	Red Bluff	75	76	4.4
Keough'S Hot Springs	Bishop	75	75	4.4
Oasis Investments	Turlock	75	95	5.5
Park Royal Mutual Water Company	Santa Rosa	75	110	6.5
Tierra Bonita Mutual Water	Lancaster	75	108	6.3
Wilson Acres Mutual Water	Red Bluff	75	61	3.6
Countryside Estates MWC	Salinas	73	109	6.4
Glenn Ave WS #01	Salinas	73	83	4.8
Lazy S Mobile Ranch	Middletown	73	103	6
Primrose Lane Apartments	Camarillo	73	76	4.4
Baycliff Water	Lower Lake	70	88	5.1
Creekside Mobilehome Park	Sacramento	70	84	4.9
Little Valley CSD	Little Valley	70	80	4.7
North Lone Pine Mutual Water Company	Lone Pine	70	73	4.3
Rivernook Campground	Kernville	70	109	6.3
Valley Vista Mutual Water Company	Bishop	70	98	5.7
West Valley Mutual Water Company	Inyokern	70	75	4.4

Source: California State Water Resources Control Board, Division of Drinking Water, 2,449 utilities, results from Jan. 2, 2019 to July 14, 2026, read Oct. 10, 2026. Each sampling point is taken at its median; a figure is typical where every point falls in one band.

Also: 7 utilities’ own water quality reports, read by hand, each named on the utility’s page.

Bands are the U.S. Geological Survey’s, at 17.1 mg/L to the grain. People served is what each utility reports; where one sells water to another, the same people can be counted twice. How hardness is measured here.

201 to 300 of 414, by people served

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