WH

Public water system

San Jose Water

PWSID CA4310011 - Santa Clara County, California

151 PPM
8.8 GPG
Moderately Hard
0Soft60120180300+
Moderately Hard (151 PPM)Verified - State Lab Tested

System Details

Water source
surface water
Population served
1,039,920
Service connections
237,130
Status
Active

Hardness Evidence

Reported hardness
151 PPM
Grains per gallon
8.8 GPG
Data source
California treated-water report
Source year
2024
Raw/source estimate
192 PPM

Linked City Reports

Los Altos, CAMountain View, CASunnyvale, CAPalo Alto, CAStanford, CAAlviso, CACampbell, CAMonte Vista, CAGilroy, CAMonte Sereno, CALos Gatos, CAMilpitas, CAMorgan Hill, CASan Martin, CASanta Clara, CASaratoga, CASan Jose, CAMount Hamilton, CA

Served ZIP Codes

ZIPLocationZIP average
94022Los Altos, CAHard (188 PPM)
94024Los Altos, CAHard (188 PPM)
94040Mountain View, CAHard (188 PPM)
94041Mountain View, CAHard (188 PPM)
94043Mountain View, CAHard (188 PPM)
94086Sunnyvale, CAHard (188 PPM)
94087Sunnyvale, CAHard (188 PPM)
94089Sunnyvale, CAHard (188 PPM)
94301Palo Alto, CAHard (188 PPM)
94304Palo Alto, CAHard (188 PPM)
94305Stanford, CAHard (188 PPM)
94306Palo Alto, CAHard (188 PPM)
95002Alviso, CAHard (188 PPM)
95008Campbell, CAHard (188 PPM)
95014Monte Vista, CAHard (188 PPM)
95020Gilroy, CAHard (188 PPM)
95030Monte Sereno, CAHard (188 PPM)
95032Los Gatos, CAHard (188 PPM)
95035Milpitas, CAHard (188 PPM)
95037Morgan Hill, CAHard (188 PPM)
95046San Martin, CAHard (188 PPM)
95050Santa Clara, CAHard (188 PPM)
95051Santa Clara, CAHard (188 PPM)
95054Santa Clara, CAHard (188 PPM)
95070Saratoga, CAHard (188 PPM)
95110San Jose, CAHard (188 PPM)
95111San Jose, CAHard (188 PPM)
95112San Jose, CAHard (188 PPM)
95113San Jose, CAHard (188 PPM)
95116San Jose, CAHard (188 PPM)
95117San Jose, CAHard (188 PPM)
95118San Jose, CAHard (188 PPM)
95119San Jose, CAHard (188 PPM)
95120San Jose, CAHard (188 PPM)
95121San Jose, CAHard (188 PPM)
95122San Jose, CAHard (188 PPM)
95123San Jose, CAHard (188 PPM)
95124San Jose, CAHard (188 PPM)
95125San Jose, CAHard (188 PPM)
95126San Jose, CAHard (188 PPM)
95127San Jose, CAHard (188 PPM)
95128San Jose, CAHard (188 PPM)
95129San Jose, CAHard (188 PPM)
95130San Jose, CAHard (188 PPM)
95131San Jose, CAHard (188 PPM)
95132San Jose, CAHard (188 PPM)
95133San Jose, CAHard (188 PPM)
95134San Jose, CAHard (188 PPM)
95135San Jose, CAHard (188 PPM)
95136San Jose, CAHard (188 PPM)
95138San Jose, CAHard (188 PPM)
95139San Jose, CAHard (188 PPM)
95140Mount Hamilton, CAHard (188 PPM)
95148San Jose, CAHard (188 PPM)

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.

MethodologySourcesSearch by ZIP