Overview
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 in District Of Columbia
Below are utilities in District Of Columbia serving over 10,000 people, listed alphabetically.
| Utility | Location | People Served |
|---|
| D.C. Water and Sewer Authority | Washington, DC | 632,323 |
| Joint Base Anacostia - Bolling | Washington, DC | 19,312 |
| Naval Station Washington - WNY | Washington Navy Yard, DC | 15,690 |
Utilities that accumulated/accrued the most violation points as of July 2021 to June 2024 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.
| Utility | Location | People Served | Violation Points |
|---|
| Joint Base Anacostia - Bolling | Washington, DC | 19,312 | 15 |
Large utilities that accumulated/accrued the most violation points as of July 2021 to June 2024 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.
| Utility | Location | People Served | Violation Points |
|---|
| Joint Base Anacostia - Bolling | Washington, DC | 19,312 | 15 |
Contaminants found in District Of Columbia above health guidelines
| Found above health guidelines | Found | |||
|---|---|---|---|---|
| Contaminant | # of Utilities | People Served | # of Utilities | People Served |
| Nitrate | 5 | 882,325 | 5 | 882,325 | ||
| Arsenic | 3 | 847,323 | 3 | 847,323 | ||
| Radium, combined (-226 & -228) | 3 | 847,323 | 3 | 847,323 | ||
| Chromium (hexavalent) | 3 | 667,325 | 3 | 667,325 | ||
| Dichloroacetic acid | 4 | 667,325 | 4 | 667,325 | ||
| Trichloroacetic acid | 4 | 667,325 | 4 | 667,325 | ||
| Bromochloroacetic acid | 4 | 667,325 | 4 | 667,325 | ||
| Haloacetic acids (HAA5) | 4 | 667,325 | 4 | 667,325 | ||
| Chloroform | 4 | 667,325 | 4 | 667,325 | ||
| Bromodichloromethane | 4 | 667,325 | 4 | 667,325 | ||
| Dibromochloromethane | 4 | 667,325 | 4 | 667,325 | ||
| Total trihalomethanes (TTHMs) | 4 | 667,325 | 4 | 667,325 | ||
| Haloacetic acids (HAA9) | 3 | 667,325 | 3 | 667,325 | ||
| Dibromoacetic acid | 1 | 19,312 | 3 | 667,325 |
