Water quality for ZIP code 20535
ZIP 20535 covers Washington in District of Columbia, District of Columbia, one of 57 ZIP codes in the county. 5 active public water systems serve the county; 3 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in District of Columbia
3 systems, largest first| System | Serves | Status | Rules violated, 3 yr |
|---|---|---|---|
| Joint Base Anacostia Bolling |
20,411 | 7 | |
| Naval Station Washington Wny |
16,800 | 4 | |
| Washington Aqueduct Division. |
0 | 0 |
Non-community systems in District of Columbia (1: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Naval Observatory |
250 | 1 | 0 |
About this data
Water systems are matched to District of Columbia, the county this ZIP code lies in, largest first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The District of Columbia records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.