Public water system
Castle Rock Municipal Water
PWSID WA5311800 - Cowlitz County, Washington
27 PPM
1.6 GPG
Soft0Soft60120180300+
Soft (27 PPM)Estimated - Nearby Data
System Details
- Water source
- surface water
- Population served
- 4,367
- Service connections
- 1,202
- Status
- Active
Hardness Evidence
- Reported hardness
- 27 PPM
- Grains per gallon
- 1.6 GPG
- Data source
- Nearby estimate
- Source year
- N/A
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 98611 | Castle Rock, WA | Slightly Hard (64 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.