Public water system
Hollister, City Of
PWSID CA3510001 - San Benito County, California
148 PPM
8.7 GPG
Moderately Hard0Soft60120180300+
Moderately Hard (148 PPM)Verified - State Lab Tested
System Details
- Water source
- surface water
- Population served
- 26,017
- Service connections
- 7,884
- Status
- Active
Hardness Evidence
- Reported hardness
- 148 PPM
- Grains per gallon
- 8.7 GPG
- Data source
- California treated-water report
- Source year
- 2023
- Raw/source estimate
- 587 PPM
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 95023 | Hollister, CA | Very Hard (374 PPM) |
| 95043 | Paicines, CA | Very Hard (368 PPM) |
| 95045 | San Juan Bautist, CA | Very Hard (367 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.