WH

Public water system

Santa Rosa, City Of

PWSID CA4910009 - Sonoma County, California

129 PPM
7.5 GPG
Moderately Hard
0Soft60120180300+
Moderately Hard (129 PPM)High Confidence - USGS Monitoring

System Details

Water source
groundwater
Population served
175,396
Service connections
54,167
Status
Active

Hardness Evidence

Reported hardness
129 PPM
Grains per gallon
7.5 GPG
Data source
USGS monitoring
Source year
N/A

Linked City Reports

Bodega, CABodega Bay, CARohnert Park, CACotati, CAPenngrove, CAPetaluma, CAValley Ford, CASanta Rosa, CAAnnapolis, CACamp Meeker, CACazadero, CACloverdale, CADuncans Mills, CAEldridge, CAForestville, CAFulton, CAGeyserville, CAGlen Ellen, CAGraton, CAGuerneville, CAHealdsburg, CAJenner, CAKenwood, CARussian River Md, CAOccidental, CARio Nido, CAFreestone, CASonoma, CAStewarts Point, CAWindsor, CAThe Sea Ranch, CA

Served ZIP Codes

ZIPLocationZIP average
94922Bodega, CAModerately Hard (126 PPM)
94923Bodega Bay, CAModerately Hard (126 PPM)
94928Rohnert Park, CAModerately Hard (126 PPM)
94931Cotati, CAModerately Hard (127 PPM)
94951Penngrove, CAModerately Hard (126 PPM)
94952Petaluma, CAModerately Hard (126 PPM)
94954Petaluma, CAModerately Hard (126 PPM)
94972Valley Ford, CAModerately Hard (126 PPM)
95401Santa Rosa, CAModerately Hard (126 PPM)
95403Santa Rosa, CAModerately Hard (126 PPM)
95404Santa Rosa, CAModerately Hard (126 PPM)
95405Santa Rosa, CAModerately Hard (126 PPM)
95407Santa Rosa, CAModerately Hard (126 PPM)
95409Santa Rosa, CAModerately Hard (126 PPM)
95412Annapolis, CAModerately Hard (126 PPM)
95419Camp Meeker, CAModerately Hard (126 PPM)
95421Cazadero, CAModerately Hard (126 PPM)
95425Cloverdale, CAModerately Hard (127 PPM)
95430Duncans Mills, CAModerately Hard (126 PPM)
95431Eldridge, CAModerately Hard (126 PPM)
95436Forestville, CAModerately Hard (126 PPM)
95439Fulton, CAModerately Hard (126 PPM)
95441Geyserville, CAModerately Hard (127 PPM)
95442Glen Ellen, CAModerately Hard (126 PPM)
95444Graton, CAModerately Hard (126 PPM)
95446Guerneville, CAModerately Hard (126 PPM)
95448Healdsburg, CAModerately Hard (126 PPM)
95450Jenner, CAModerately Hard (126 PPM)
95452Kenwood, CAModerately Hard (126 PPM)
95462Russian River Md, CAModerately Hard (126 PPM)
95465Occidental, CAModerately Hard (126 PPM)
95471Rio Nido, CAModerately Hard (126 PPM)
95472Freestone, CAModerately Hard (127 PPM)
95476Sonoma, CAModerately Hard (126 PPM)
95480Stewarts Point, CAModerately Hard (126 PPM)
95492Windsor, CAModerately Hard (126 PPM)
95497The Sea Ranch, CAModerately Hard (126 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