D.C. WATER AND SEWER AUTHORITY
Washington, DC · 632,323 served
D.C. WATER AND SEWER AUTHORITY serves 632,323 people in Washington, DC. It has 0 health-based violations in the last 5 years. TapGraded gives this system an A.
Score breakdown
Health-based violations (5y)
0
Monitoring violations (5y)
4
Currently unaddressed
0
Overall score
92/100
Violation history (last 5 years)
Get alerted when D.C. WATER AND SEWER AUTHORITY gets a violation
We'll only email you about this water system. Unsubscribe anytime.
Lead (Lead and Copper Rule)
EPA's current lead action level is 15 ppb (dropping to 10 ppb in 2027 under the Lead and Copper Rule Improvements).
PFAS (UCMR5 occurrence data)
System details
- System type
- Community water system
- Water source
- Surface water purchased from another system
- Ownership
- Local government
- Service connections
- 133,500
Worried about what's in your tap?
See which water filters are certified to remove the contaminants found in your area.
Find a filter that matches your waterFrequently asked questions
Is Washington, DC tap water safe to drink?
D.C. WATER AND SEWER AUTHORITY has 0 health-based violations in the last 5 years. TapGraded gives this system an A.
Does D.C. WATER AND SEWER AUTHORITY have lead in its water?
The most recent 90th-percentile lead sample is 2 ppb, versus the EPA action level of 15 ppb.
Has PFAS been detected in D.C. WATER AND SEWER AUTHORITY's water?
This system was tested under UCMR5 and no PFAS was detected above the reporting limit in the analytes we track.
Source: EPA SDWIS/ECHO · Data as of 2026Q2