California utilities with soft water.

Up to 60 mg/L (3.5 grains per gallon). 325 utilities serving 910,291 people as they report it, largest first.

101 to 200 of 325, by people served

California utilities with soft water, 101 to 200, 101 to 200
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Loch Lomond Mutual Water Co	Cobb	666	27	1.6
Lake Alpine Water Company	Bear Valley	625	11	0.6
Adventist Health - St. Helena Hospital	St. Helena	617	42	2.5
Ducor CSD	Ducor	616	29	1.7
Shaver Lake Heights MWC	Clovis	616	50	2.9
Juvenile Justice Campus	Fresno	565	50	2.9
Little Potato Slough Mutual	Lodi	560	55	3.2
Lanare Community Services Dist	Coalinga	540	8.5	0.5
Mountain Meadows MWC	Mammoth Lakes	525	30	1.8
Lake Almanor Country Club MWC	Lake Almanor	500	59	3.4
Starlite Pines Mutual Water Co Inc	Shingletown	500	58	3.4
El Dorado ID - Outingdale	Placerville	478	13	0.8
Lassen Pines Mutual Water Co Inc	Shingletoown	475	49	2.9
Bennett Ridge Mutual Water Company	Santa Rosa	439	41	2.4
California Pines C.S.D.	Alturas	431	14	0.8
Yosemite West Water System	Mariposa	420	17	1
Shasta CSA - French Gulch, #11	Redding	419	45	2.6
Hhw&P Moccasin Compound - SFPUC	Burlingame	410	3.2	0.2
Teviston Community Services District	Pixley	403	30	1.8
Clear Creek CSD - Westwood	Westwood	400	60	3.5
CSA 51	Desert Center	400	42	2.5
Sunset Vista Estates MHP	Lemoore	400	3.7	0.2
Tahoe City PUD - Madden Creek	Tahoe City	397	42	2.5
Del Oro Water Company - Strawberry Div.	Chico	386	14	0.8
Anderson Springs CSD	Middletown	373	29	1.7
El Dorado ID - Strawberry	Placerville	357	7.8	0.5
Verde Vale Water Company	Anderson	356	46	2.7
Plumas Eureka CSD	Blairsden	334	19	1.1
Shasta CSA - Castella, #3	Redding	333	35	2
Washington Water District	Washington	330	22	1.3
Desert Springs MWC	Lucerne Valley	325	56	3.2
Sierra Water Resources - Sierra City	Claremont	324	35	2
Owens Valley Water Resources, Inc.	Claremont	311	57	3.3
June Lake PUD - Down Canyon	June Lake	310	26	1.5
Lower Rock Creek Mutual Water Co.	Bishop	310	16	0.9
San Joaquin Water Works #2	Stockton	310	48	2.8
Okieville Highland Acres MWC	Tulare	300	13	0.8
Woodward Bluffs MHP	Fresno	300	25	1.5
Hope Foundation/Moriah Heights	Plymouth	299	34	2
Lake Madrone Water District	Berry Creek	297	21	1.2
Lake Siskiyou M.W.C.	MT. Shasta	281	56	3.3
Town of Sunol - SFPUC	Burlingame	281	8	0.5
Lakeshore Heights Mutual Water	Lakehead	264	28	1.6
MD 08 North Fork Water System	Madera	264	39	2.3
Happy Acres Mutual Benefit Water System	Cotati	260	46	2.7
Ccwd - Wallace	San Andreas	255	42	2.5
Alpine Meadows Property Owners Asso	Colfax	250	27	1.5
Heather Glen Community Service Dist	Applegate	250	16	1
Sierra City Water Works, Inc.	Sierra City	250	54	3.1
Shasta CSA - Cragview, #23	Redding	248	39	2.3
Klamath C.S.D.	Klamath	240	38	2.2
Pine Creek Village	Mammoth Lakes	240	39	2.3
Lee Vining Public Utility District	Lee Vining	222	14	0.8
El Rancho Mobile Home Park	Rancho Cucamonga	215	48	2.8
Tahoe City PUD - Alpine Peaks	Tahoe City	214	44	2.6
Sierra Lakes County Water Dist	Truckee	210	22	1.3
Cottonwood Ridge Manufactured Housing Co	San Diego	205	52	3
King Island Trailer Park Water System	Stockton	200	46	2.7
Mustang Mutual Water System	Bakersfield	200	22	1.3
Tucker Acres Mutual Water Co.	Calistoga	200	50	2.9
Tid/ la Grange Water System	Turlock	195	14	0.8
Placer CWA - Applegate	Auburn	190	18	1
Awa la Mel Heights #3	Sutter Creek	188	22	1.3
Caspar South Service Company	Santa Rosa	188	43	2.5
Lakeside Woods Mutual Water Co	Lakehead	186	48	2.8
Fcsa 43 - Raisin City	Fresno	182	17	1
Sierra Co. W.W.D #1 Calpine	Calpine	182	30	1.8
Crowley Lake Mutual Water Company	Crowley Lake	175	20	1.2
Markleeville Water Co.	Markleeville	175	36	2.1
Manning Gardens Care Center Inc	Fresno	170	44	2.6
Knights Ferry Comm. Svc. Dist.	Knights Ferry	168	27	1.6
NPS - Wolverton	Three Rivers	165	7.5	0.4
Madera Co Md1 - Hidden Lake Estates	Madera	162	13	0.7
Sugar Pine Rv Resort	Twain Harte	160	34	2
Surfwood Mutual Water Corporation	Mendocino	160	24	1.4
Wilson Circle Mutual Water Company	Bishop	158	51	3
Woods, the (Mendocino)	Santa Cruz	153	7	0.4
Stone Creek Water Company	Palm Desert	152	55	3.2
Birchim Community Service District	Toms Place	150	11	0.6
Cal Fire Baseline Conservation Camp	Jamestown	150	23	1.4
Mission Highlands Mutual Water Co.	Sonoma	150	53	3.1
Monte Shasta M.W.C.	MT. Shasta	150	34	2
Walker Ranch CSD	Quincy	150	52	3
Yosemite NPS - Wawona	Yosemite Np	150	11	0.6
Mulberry MHP	Stockton	148	57	3.4
Ponderosa Mobile Home Park	Dana Point	146	53	3.1
Maher Mutual Water Company	Bakersfield	140	58	3.4
Sierra Grande Estates Mutual Water Co.	Bishop	138	55	3.2
Cedar Valley Mutual Water Co	Oakhurst	137	54	3.2
Abrams Lake Mobile Estates	Yorba Linda	135	46	2.7
Madera Co Sa16 Sumner Hill	Madera	135	13	0.8
Trinidad Extended Stay Rv	Sacramento	130	15	0.9
Lili Valley Water Co.	West Point	126	24	1.4
Plavada Community Association	Soda Springs	126	15	0.9
Nevada ID - Smartsville	Grass Valley	122	35	2
Sugar Pine Homeowners Assoc	Oakhurst	120	51	3
Fcwwd 37/mile High	Fresno	118	32	1.9
Forest Ranch Mutual Water System	Forest Ranch	118	46	2.7
Redcrest Water Works	Whitethorn	116	52	3
Big Lagoon CSD	Trinidad	112	37	2.2

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.

101 to 200 of 325, by people served

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