D.C. WATER AND SEWER AUTHORITY Water Quality Report
Population
632,323
people served
Water Source
🌊 Surface
rivers, lakes, reservoirs
National Rank
Top 90%
of 49,184 US systems
5-Year Record
⚠️ 8
violations recorded
C
Fair
Safety Grade
8 violations in the past 5 years, including 5 health-based
System Details
- PWSID
- DC0000002
- Population Served
- 632,323
- Water Source
- Surface Water
- Owner
- Local Government
- State
- District of Columbia
- EPA Region
- 3
Contaminants of Concern
| Contaminant | Status | Violations |
|---|---|---|
| Contaminant 5000 | ✕ Health-Based | 12 |
| Contaminant 7000 | ⚠ Monitoring/Reporting | 2 |
| Contaminant 8000 | ⚠ Monitoring/Reporting | 4 |
| Contaminant 0200 | ⚠ Monitoring/Reporting | 4 |
Violation History
2023
4
2022
4
2005
1
2004
1
2003
3
2002
2
2001
3
2000
1
1999
2
1998
1
Total violations on record: 22
Service Area
Cities Served
ZIP Codes Served
How does this compare?
This systemNational average
Grade C
Avg: B-C
22violations total
79% of national average
National avg: ~28 per system
🏙️ This is a large system — serving 95× more people than the national average.