Public water system
Oak Harbor City Of
PWSID WA5362650 - Island County, Washington
289 PPM
16.9 GPG
Very Hard0Soft60120180300+
Very Hard (289 PPM)High Confidence - USGS Monitoring
System Details
- Water source
- surface water
- Population served
- 23,767
- Service connections
- 8,825
- Status
- Active
Hardness Evidence
- Reported hardness
- 289 PPM
- Grains per gallon
- 16.9 GPG
- Data source
- USGS monitoring
- Source year
- N/A
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 98236 | Clinton, WA | Very Hard (278 PPM) |
| 98239 | Coupeville, WA | Very Hard (289 PPM) |
| 98249 | Freeland, WA | Hard (237 PPM) |
| 98253 | Greenbank, WA | Very Hard (289 PPM) |
| 98260 | Langley, WA | Very Hard (283 PPM) |
| 98277 | Oak Harbor, WA | Very Hard (289 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.