Public water system
San Gabriel Valley Wc - Fontana
PWSID CA3610041 - San Bernardino County, California
129 PPM
7.5 GPG
Moderately Hard0Soft60120180300+
Moderately Hard (129 PPM)Verified - State Lab Tested
System Details
- Water source
- surface water
- Population served
- 237,700
- Service connections
- 47,079
- Status
- Active
Hardness Evidence
- Reported hardness
- 129 PPM
- Grains per gallon
- 7.5 GPG
- Data source
- California treated-water report
- Source year
- 2024
- Raw/source estimate
- 153 PPM
Linked City Reports
Alta Loma, CAChino Hills, CAChino, CARancho Cucamonga, CAEtiwanda, CAOntario, CAMontclair, CAUpland, CABig River, CAJoshua Tree, CAMorongo Valley, CAParker Dam, CAPioneertown, CATwentynine Palms, CAVidal, CAYucca Valley, CALanders, CAAdelanto, CAAmboy, CAAngelus Oaks, CAApple Valley, CABaker, CAFort Irwin, CABarstow, CAGrand Terrace, CABig Bear City, CABig Bear Lake, CABloomington, CABlue Jay, CACedar Glen, CACrestline, CADaggett, CAEssex, CAFawnskin, CAFontana, CALudlow, CAForest Falls, CAGreen Valley Lak, CAHelendale, CAHesperia, CAEast Highland, CAHinkley, CALake Arrowhead, CALoma Linda, CALucerne Valley, CALytle Creek, CAMentone, CANeedles, CANipton, CANewberry Springs, CAOro Grande, CAPhelan, CAPinon Hills, CARedlands, CARialto, CAArrowbear Lake, CASugarloaf, CASpring Valley La, CAGeorge Afb, CAWrightwood, CAYermo, CAYucaipa, CASan Bernardino, CAMuscoy, CAArgus, CA
Served ZIP Codes
How to Use This System Page
A public water system can serve multiple ZIP codes and cities. Use this page to inspect the source behind the hardness reading, then open the linked ZIP or city page for the local rollup.
If you are sizing treatment equipment, confirm your actual tap hardness with a home test or lab test before buying.