Public water system
City Of Paso Robles Water Division
PWSID CA4010007 - San Luis Obispo County, California
408 PPM
23.8 GPG
Very Hard0Soft60120180300+
Very Hard (408 PPM)High Confidence - USGS Monitoring
System Details
- Water source
- surface water
- Population served
- 31,176
- Service connections
- 10,822
- Status
- Active
Hardness Evidence
- Reported hardness
- 408 PPM
- Grains per gallon
- 23.8 GPG
- Data source
- USGS monitoring
- Source year
- N/A
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 93401 | San Luis Obispo, CA | Very Hard (371 PPM) |
| 93402 | Los Osos, CA | Very Hard (369 PPM) |
| 93405 | San Luis Obispo, CA | Very Hard (372 PPM) |
| 93420 | Halcyon, CA | Very Hard (370 PPM) |
| 93422 | Atascadero, CA | Very Hard (372 PPM) |
| 93424 | Avila Beach, CA | Very Hard (372 PPM) |
| 93428 | Cambria, CA | Very Hard (383 PPM) |
| 93430 | Cayucos, CA | Very Hard (370 PPM) |
| 93432 | Creston, CA | Very Hard (372 PPM) |
| 93433 | Grover Beach, CA | Very Hard (372 PPM) |
| 93442 | Morro Bay, CA | Very Hard (372 PPM) |
| 93444 | Nipomo, CA | Very Hard (372 PPM) |
| 93445 | Oceano, CA | Very Hard (385 PPM) |
| 93446 | Adelaide, CA | Very Hard (368 PPM) |
| 93449 | Shell Beach, CA | Very Hard (373 PPM) |
| 93451 | Parkfield, CA | Very Hard (373 PPM) |
| 93452 | San Simeon, CA | Very Hard (373 PPM) |
| 93453 | California Valle, CA | Very Hard (372 PPM) |
| 93461 | Shandon, CA | Very Hard (372 PPM) |
| 93465 | Templeton, CA | Very Hard (380 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.