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.

301 to 325 of 325, by people served

California utilities with soft water, 301 to 325, 301 to 325
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Moonstone Heights Mwa	Trinidad	33	29	1.7
Nord Road Water Association	Bakersfield	32	12	0.7
LADWP - Mountain View Trailer Court	Los Angeles	31	32	1.8
Wilcox Station Ranch	Canyon	31	36	2.1
Cardoza Villa Corp	Manteca	30	46	2.7
Kyburz Mutual Water Company	Kyburz	30	41	2.4
Lindy'S Landing	Reedley	30	53	3.1
Paradise Valley MWC	Mountain Center	30	28	1.6
Sunland Village Mobile Home Park	Crowley Lake	29	46	2.7
Berry Creek Community Service Dist	Oroville	28	8	0.5
Evergreen Motel & MHP	Clayton	28	52	3
Forest Village LLC	Rescue	28	33	1.9
Mountain of Attention Water	Middletown	26	56	3.3
Collinsville Water Works	Birds Landing	25	19	1.1
Cresta Mesa Parque	Fairfield	25	42	2.4
Frccsd Hot Springs	Twain	25	35	2
Helm School	Helm	25	38	2.2
Honey Lake Campground	Milford	25	54	3.2
R - Ranch in the Sequoias	Kernville	25	45	2.6
Shaver Lake Heights Water Assn	Prather	25	46	2.7
Vailima Estates Mutual Water	St. Helena	25	51	3
Forest Ranch Mobile Park	Oakley	24	31	1.8
Meadow Lake Apartments	Fillmore	22	53	3.1
Big Lagoon Park Water Co.	Eureka	20	34	2
Barton Flats Water System	Angelus Oaks	11	28	1.6

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.

301 to 325 of 325, by people served

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