Public water system
Seattle Public Utilities
PWSID WA5377050 - King County, Washington
22 PPM
1.3 GPG
Soft0Soft60120180300+
Soft (22 PPM)Verified - Annual Water Quality Report
System Details
- Water source
- surface water
- Population served
- 1,091,904
- Service connections
- 171,515
- Status
- Active
Hardness Evidence
- Reported hardness
- 22 PPM
- Grains per gallon
- 1.3 GPG
- Data source
- Annual Water Quality Report
- Source year
- N/A
- Raw/source estimate
- 110 PPM
Linked City Reports
Algona, WAAuburn, WAFederal Way, WABeaux Arts, WABellevue, WABlack Diamond, WABothell, WACarnation, WADuvall, WAEnumclaw, WAFall City, WAHobart, WAIssaquah, WAKenmore, WASammamish, WAKent, WAKirkland, WAMaple Valley, WAMedina, WAMercer Island, WANorth Bend, WAPacific, WARavensdale, WARedmond, WARenton, WASnoqualmie, WAVashon, WAWoodinville, WASeattle, WATukwila, WABurien, WANormandy Park, WALk Forest Park, WADes Moines, WABlakely Island, WABaring, WAOlga, WAOrcas, WAShaw Island, WASkykomish, WAWaldron, WA
Served ZIP Codes
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.