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EWG's Tap Water Database

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District Of Columbia

  • 5 Utilities

  • Serving: 665,000

  • Data available: 2010-2015

  • Contaminants Found: 34

 

EWG's drinking water quality report for District Of Columbia shows results of tests conducted by the water utilities in District Of Columbia and provided to EWG by the Army Corps of Engineers and EPA Region 3.

LARGE UTILITIES
ALL UTILITIES WITH VIOLATIONS
LARGE UTILITIES WITH VIOLATIONS

Below are utilities in District Of Columbia serving over 10,000 people, listed alphabetically.

Large utilities in District Of Columbia

UtilityLocationPeople
Served
Bolling - Joint Base Anacostia-BollingJoint Base Anacostia-bolling, DC12,499
D.C. Water and Sewer AuthorityWashington, DC632,323
Naval Station Washington - WNYWashington Navy Yard, DC15,690

Utilities that accumulated/accrued the most violation points as of January to March 2017 in District Of Columbia

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Naval Station Washington - WNYWashington Navy Yard, DC15,6906

Large utilities that accumulated/accrued the most violation points as of January to March 2017 in District Of Columbia

The Environmental Protection Agency's Enforcement and Compliance History Online (ECHO) database collects compliance and enforcement-related information for drinking water utilities nationwide. ECHO water quality violation scores take into account federal health-based water quality standards, as well as monitoring, reporting and other drinking water quality requirements. Points are accrued based on specific problems at the utility - violations of health-based drinking water standards receive more points than monitoring and reporting violations - and the length of time until the violations were corrected.

UtilityLocationPeople
Served
Violation
Points
Naval Station Washington - WNYWashington Navy Yard, DC15,6906

Contaminants found in District Of Columbia above health guidelines

Found above health guidelinesFound
Contaminant# of UtilitiesPeople Served# of UtilitiesPeople Served

Chlorate
5664,5725664,572

Chromium (hexavalent)
4664,5724664,572

Dichloroacetic acid
4664,5724664,572

Trichloroacetic acid
4664,5724664,572

Chloroform
4664,5724664,572

Bromodichloromethane
4664,5724664,572

Dibromochloromethane
4664,5724664,572

Total trihalomethanes (TTHMs)
4664,5724664,572

Arsenic
3644,8223644,822

Contaminants found in District Of Columbia above legal limits

Contaminant# of UtilitiesPeople Served