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EWG's Tap Water Database — 2021 UPDATE

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District Of Columbia

  • 4 Utilities

  • Serving: 665,000

  • Data available: 2014-2019

  • Contaminants Found: 35

 

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
D.C. Water and Sewer AuthorityWashington, DC632,323
Joint Base Anacostia - BollingWashington, DC16,559
Naval Station Washington - WNYWashington Navy Yard, DC15,690

Utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 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
Joint Base Anacostia - BollingWashington, DC16,55910
Naval Station Washington - WNYWashington Navy Yard, DC15,6906

Large utilities that accumulated/accrued the most violation points as of April 2019 to March 2021 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
Joint Base Anacostia - BollingWashington, DC16,55910
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

Arsenic
4664,5723648,882

Chlorate
3664,5723664,572

Nitrate and nitrite
4664,5723648,882

Nitrate
4664,5724664,572

Chromium (hexavalent)
3664,5723664,572

Haloacetic acids (HAA5)
4664,5724664,572

Total trihalomethanes (TTHMs)
4664,5724664,572

Radium, combined (-226 & -228)
4664,5723648,882

Haloacetic acids (HAA9)
3664,5723664,572

Contaminants found in District Of Columbia above legal limits

Contaminant# of UtilitiesPeople Served