Public water system
Washington Aqueduct Division.
PWSID DC0000001 - District Of Columbia County, District of Columbia
120 PPM
7 GPG
Moderately Hard0Soft60120180300+
Moderately Hard (120 PPM)Verified - Annual Water Quality Report
System Details
- Water source
- surface water
- Population served
- 0
- Service connections
- 3
- Status
- Active
Hardness Evidence
- Reported hardness
- 120 PPM
- Grains per gallon
- 7 GPG
- Data source
- Annual Water Quality Report
- Source year
- N/A
- Raw/source estimate
- 187 PPM
Linked City Reports
Served ZIP Codes
| ZIP | Location | ZIP average |
|---|---|---|
| 20016 | Washington, DC | Moderately Hard (120 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.