Public water system
Harford County D.P.W.
PWSID MD0120016 - Harford County, Maryland
119 PPM
7 GPG
Slightly Hard0Soft60120180300+
Slightly Hard (119 PPM)High Confidence - USGS Monitoring
System Details
- Water source
- surface water
- Population served
- 104,567
- Service connections
- 39,311
- Status
- Active
Hardness Evidence
- Reported hardness
- 119 PPM
- Grains per gallon
- 7 GPG
- Data source
- USGS monitoring
- Source year
- N/A
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 21001 | Aberdeen, MD | Slightly Hard (107 PPM) |
| 21005 | Aberdeen Proving, MD | Slightly Hard (107 PPM) |
| 21009 | Abingdon, MD | Slightly Hard (107 PPM) |
| 21010 | Gunpowder, MD | Slightly Hard (107 PPM) |
| 21014 | Bel Air, MD | Slightly Hard (106 PPM) |
| 21015 | Bel Air, MD | Slightly Hard (107 PPM) |
| 21017 | Belcamp, MD | Slightly Hard (107 PPM) |
| 21028 | Churchville, MD | Slightly Hard (107 PPM) |
| 21034 | Darlington, MD | Slightly Hard (107 PPM) |
| 21040 | Edgewood, MD | Slightly Hard (107 PPM) |
| 21047 | Fallston, MD | Slightly Hard (107 PPM) |
| 21050 | Forest Hill, MD | Slightly Hard (107 PPM) |
| 21078 | Havre De Grace, MD | Slightly Hard (107 PPM) |
| 21084 | Jarrettsville, MD | Slightly Hard (107 PPM) |
| 21085 | Joppa, MD | Slightly Hard (107 PPM) |
| 21130 | Perryman, MD | Slightly Hard (107 PPM) |
| 21132 | Pylesville, MD | Slightly Hard (107 PPM) |
| 21154 | Rocks, MD | Slightly Hard (107 PPM) |
| 21160 | Whiteford, MD | Slightly Hard (107 PPM) |
| 21161 | White Hall, MD | Slightly Hard (107 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.