Public water system
Clearlake Oaks County Water District
PWSID CA1710001 - Lake County, California
143 PPM
8.4 GPG
Moderately Hard0Soft60120180300+
Moderately Hard (143 PPM)Verified - State Lab Tested
System Details
- Water source
- surface water
- Population served
- 2,359
- Service connections
- 2,161
- Status
- Active
Hardness Evidence
- Reported hardness
- 143 PPM
- Grains per gallon
- 8.4 GPG
- Data source
- California treated-water report
- Source year
- 2024
- Raw/source estimate
- 125 PPM
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 95423 | Clearlake Oaks, CA | Hard (210 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.