Public water system
Mason City Water Department
PWSID IA1750048 - Cerro Gordo County, Iowa
297 PPM
17.4 GPG
Very Hard0Soft60120180300+
Very Hard (297 PPM)High Confidence - USGS Monitoring
System Details
- Water source
- groundwater
- Population served
- 27,338
- Service connections
- 19,000
- Status
- Active
Hardness Evidence
- Reported hardness
- 297 PPM
- Grains per gallon
- 17.4 GPG
- Data source
- USGS monitoring
- Source year
- N/A
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 50401 | Mason City, IA | Very Hard (297 PPM) |
| 50428 | Clear Lake, IA | Very Hard (296 PPM) |
| 50433 | Dougherty, IA | Very Hard (297 PPM) |
| 50457 | Meservey, IA | Very Hard (297 PPM) |
| 50464 | Plymouth, IA | Very Hard (297 PPM) |
| 50469 | Rockwell, IA | Very Hard (297 PPM) |
| 50477 | Swaledale, IA | Very Hard (297 PPM) |
| 50479 | Thornton, IA | Very Hard (297 PPM) |
| 50482 | Ventura, IA | Very Hard (301 PPM) |
| 50531 | Dolliver, IA | Very Hard (297 PPM) |
| 50556 | Ledyard, IA | Very Hard (297 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.