Water quality for ZIP code 21864
ZIP 21864 covers Stockton in Worcester County, Maryland, one of 10 ZIP codes in the county. 137 active public water systems serve the county; 41 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Worcester County
18 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Town of Snow Hill |
2,409 | 1 | 9.6 mi | |
| Newark |
325 | 0 | 16.6 mi | |
| Sunset Lakes LLC |
48 | 1 | 22.3 mi | |
| Town of Berlin |
4,500 | 0 | 23.0 mi | |
| Briddletown Distribution System |
150 | 0 | 24.0 mi | |
| Pin Oak Apartments |
40 | 1 | 24.3 mi | |
| Lake Haven Mobile Home Park |
384 | 1 | 25.3 mi | |
| Four Seasons Park Inc. |
25 | 0 | 25.6 mi | |
| Mystic Harbour |
5,945 | 0 | 25.6 mi | |
| Riddle Farm |
500 | 0 | 25.9 mi | |
| Bayside Village |
50 | 2 | 26.1 mi | |
| BB Apartments (prev Woc Village Apts) |
40 | 5 | 26.3 mi | |
| Delmarva Mobile Home Park |
62 | 0 | 26.5 mi | |
| Ocean Pines |
11,890 | 1 | 27.9 mi | |
| St. Martins by the Bay |
120 | 2 | 28.9 mi | |
| Riverview Mobile Home Park |
150 | 1 | 29.8 mi | |
| Town of Ocean City |
30,000 | 2 | 31.4 mi | |
| Nantucket Point(distribution-Delaware) |
500 | 0 | 34.1 mi |
Non-community systems in Worcester County (118: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Worcester County, the county this ZIP code lies in, nearest to the ZIP code's centre 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. Distances are measured to the centre of the service area EPA publishes for the system.
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 Maryland 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. Retrieved from ECHO on Oct 11, 2026.