Public water system
Nps Ggnra
PWSID CA2110350 - Marin County, California
216 PPM
12.6 GPG
Hard0Soft60120180300+
Hard (216 PPM)High Confidence - USGS Monitoring
System Details
- Water source
- surface water
- Population served
- 18,447
- Service connections
- 224
- Status
- Active
Hardness Evidence
- Reported hardness
- 216 PPM
- Grains per gallon
- 12.6 GPG
- Data source
- USGS monitoring
- Source year
- N/A
Linked City Reports
San Rafael, CACivic Center, CAKentfield, CABelvedere, CABolinas, CACorte Madera, CADillon Beach, CAFairfax, CAForest Knolls, CAInverness, CALagunitas, CALarkspur, CAMarshall, CAMill Valley, CANovato, CANicasio, CAOlema, CAPoint Reyes Stat, CASan Anselmo, CASan Geronimo, CASan Quentin, CASausalito, CAStinson Beach, CATomales, CAWoodacre, CA
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 94901 | San Rafael, CA | Slightly Hard (82 PPM) |
| 94903 | Civic Center, CA | Slightly Hard (82 PPM) |
| 94904 | Kentfield, CA | Slightly Hard (82 PPM) |
| 94920 | Belvedere, CA | Slightly Hard (82 PPM) |
| 94924 | Bolinas, CA | Slightly Hard (83 PPM) |
| 94925 | Corte Madera, CA | Slightly Hard (82 PPM) |
| 94929 | Dillon Beach, CA | Slightly Hard (82 PPM) |
| 94930 | Fairfax, CA | Slightly Hard (82 PPM) |
| 94933 | Forest Knolls, CA | Slightly Hard (82 PPM) |
| 94937 | Inverness, CA | Slightly Hard (83 PPM) |
| 94938 | Lagunitas, CA | Slightly Hard (82 PPM) |
| 94939 | Larkspur, CA | Slightly Hard (82 PPM) |
| 94940 | Marshall, CA | Slightly Hard (82 PPM) |
| 94941 | Mill Valley, CA | Slightly Hard (82 PPM) |
| 94945 | Novato, CA | Slightly Hard (82 PPM) |
| 94946 | Nicasio, CA | Slightly Hard (82 PPM) |
| 94947 | Novato, CA | Slightly Hard (82 PPM) |
| 94949 | Novato, CA | Slightly Hard (82 PPM) |
| 94950 | Olema, CA | Slightly Hard (82 PPM) |
| 94956 | Point Reyes Stat, CA | Slightly Hard (82 PPM) |
| 94960 | San Anselmo, CA | Slightly Hard (82 PPM) |
| 94963 | San Geronimo, CA | Slightly Hard (82 PPM) |
| 94964 | San Quentin, CA | Slightly Hard (82 PPM) |
| 94965 | Sausalito, CA | Slightly Hard (82 PPM) |
| 94970 | Stinson Beach, CA | Slightly Hard (82 PPM) |
| 94971 | Tomales, CA | Slightly Hard (82 PPM) |
| 94973 | Woodacre, CA | Slightly Hard (82 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.