Water quality for ZIP code 21641
ZIP 21641 covers Hillsboro in Caroline County, Maryland, one of 8 ZIP codes in the county. 59 active public water systems serve the county; 17 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Caroline County
18 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Benedictine School |
300 | 3 | 6.8 mi | |
| Town of Denton |
4,848 | 0 | 6.9 mi | |
| Tower Court Mobile Home Park |
40 | 1 | 8.2 mi | |
| Town of Greensboro |
1,878 | 1 | 8.2 mi | |
| Taylors Mobile Home Park |
27 | 6 | 8.4 mi | |
| Holly Cove Harbor Mobile Home Park |
45 | 2 | 10.1 mi | |
| Dover Bridge Park |
100 | 3 | 12.0 mi | |
| Dover Bridge II Mobile Home Park |
35 | 0 | 12.1 mi | |
| Nelpine Mobile Home Park |
70 | 0 | 13.0 mi | |
| Jonestown Water System |
150 | 1 | 13.3 mi | |
| Caroline Acres Mobile Home Park |
395 | 4 | 13.9 mi | |
| Town of Henderson |
156 | 4 | 14.3 mi | |
| Town of Preston |
750 | 1 | 14.4 mi | |
| Meadowbrook Court |
50 | 1 | 15.0 mi | |
| Cedar Mobile Home Park |
300 | 3 | 16.3 mi | |
| Harman Subdivision |
35 | 3 | 17.5 mi | |
| Town of Federalsburg |
2,450 | 1 | 18.0 mi | |
| Liberty Mobile Home Park |
40 | 2 | 18.3 mi |
Non-community systems in Caroline County (40: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Caroline 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.