Public water system
Washington State University
PWSID WA5393200 - Whitman County, Washington
110 PPM
6.4 GPG
Slightly Hard0Soft60120180300+
Slightly Hard (110 PPM)Estimated - County Avg
System Details
- Water source
- groundwater
- Population served
- 21,506
- Service connections
- 4,355
- Status
- Active
Hardness Evidence
- Reported hardness
- 110 PPM
- Grains per gallon
- 6.4 GPG
- Data source
- County average estimate
- Source year
- N/A
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 99017 | Lamont, WA | Moderately Hard (134 PPM) |
| 99033 | Tekoa, WA | Moderately Hard (132 PPM) |
| 99102 | Albion, WA | Moderately Hard (134 PPM) |
| 99111 | Colfax, WA | Moderately Hard (131 PPM) |
| 99113 | Colton, WA | Moderately Hard (134 PPM) |
| 99125 | Endicott, WA | Moderately Hard (133 PPM) |
| 99130 | Garfield, WA | Moderately Hard (134 PPM) |
| 99136 | Hay, WA | Moderately Hard (134 PPM) |
| 99143 | Lacrosse, WA | Moderately Hard (134 PPM) |
| 99149 | Malden, WA | Moderately Hard (134 PPM) |
| 99158 | Oakesdale, WA | Moderately Hard (133 PPM) |
| 99161 | Palouse, WA | Moderately Hard (133 PPM) |
| 99163 | Pullman, WA | Moderately Hard (134 PPM) |
| 99170 | Rosalia, WA | Moderately Hard (133 PPM) |
| 99171 | Saint John, WA | Moderately Hard (134 PPM) |
| 99176 | Thornton, WA | Moderately Hard (134 PPM) |
| 99179 | Uniontown, WA | Moderately Hard (133 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.