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EPA WATER QUALITY DATA · DC

Is District of Columbia Tap Water Safe in 2026?

Population-weighted grade and city-level UCMR5 risk bands for 1 WaterCheckup cities in District of Columbia. "At Risk" means at least one analyte above an EPA limit or a regulated PFAS violation for that system. "Safe" means no such flag and a low-concern city profile.

COUNTY GRADE
F
Score 27
1
Total cities
0
At Risk
0
Safe
700K
Population served
TOP CONTAMINANTS IN DISTRICT OF COLUMBIA (UCMR5)

Most common analytes with detections (>0) across cities in this county — each city counted once per compound.

1.PFHxA1 city
2.PFPeA1 city
CITIES IN DISTRICT OF COLUMBIA
CITYGRADECONTAMINANTS ABOVE LIMITPOPULATION
Washington DCFMONITOR—700K
FILTER RECOMMENDATIONS

Typical picks for households in District of Columbia when UCMR5 shows PFAS or related analytes — same product lines we feature on city pages.

TOP PICKS FOR DISTRICT OF COLUMBIA
⚠ PFHxA and related contaminants in county UCMR data
#1
Waterdrop G3P800 RO
EDITORS PICK
Waterdrop  ·  ~$849
Tankless 800 GPD, removes 99%+ PFAS & lead, 10-stage filtration. Smart faucet TDS display.
WHY THIS FOR DISTRICT OF COLUMBIA · Chosen for District of Columbia because several cities are in a medium- or high-concern profile even without an EPA-limit flag in UCMR — RO still provides the broadest contaminant coverage for household drinking water.
#2
Aquasana SmartFlow RO
MOST CERTIFIED
Aquasana  ·  ~$449
WQA Gold Seal + NSF 42/53/58/401. Most certifications of any under-sink RO. Removes 90+ contaminants.
#3
AquaTru Under-Sink RO
EASIEST FILTER CHANGE
AquaTru  ·  ~$375
NSF 42/53/58 certified. Quick-change filters, no tools. Compact tankless design, 4-stage filtration.
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