Water quality for ZIP code 21157
ZIP 21157 covers Westminster in Carroll County, Maryland, one of 9 ZIP codes in the county. 224 active public water systems serve the county; 25 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 Carroll County
23 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Wakefield Valley |
2,436 | 2 | 2.9 mi | |
| Sullivans Mobile Home Park Community |
70 | 0 | 3.8 mi | |
| Hillandale Mobile Home Park |
220 | 1 | 4.9 mi | |
| Todd Village Mobile Home Park |
180 | 0 | 5.2 mi | |
| Town of New Windsor |
1,732 | 1 | 6.4 mi | |
| Pleasant Valley |
150 | 0 | 6.7 mi | |
| Reservoir Trailer Park |
79 | 0 | 7.1 mi | |
| Lakeview MHP LLC |
76 | 2 | 7.6 mi | |
| Town of Hampstead |
6,600 | 0 | 8.3 mi | |
| Taylorsville Mhc, LLC |
38 | 0 | 8.5 mi | |
| Bark Hill Bible Church |
163 | 0 | 9.0 mi | |
| Town of Manchester |
4,954 | 0 | 9.1 mi | |
| Rockbrook Village Mobile Home Park |
150 | 0 | 10.2 mi | |
| Woodbine Village Mobile Home Park |
150 | 0 | 10.3 mi | |
| Town of Union Bridge |
997 | 0 | 10.4 mi | |
| Freedom District |
24,867 | 2 | 10.5 mi | |
| Springfield Hospital Distribution |
1,500 | 2 | 11.4 mi | |
| City of Taneytown |
6,750 | 0 | 12.3 mi | |
| Gaither Manor Apartments |
450 | 1 | 12.4 mi | |
| Twin Arch Mobile Home Park |
50 | 0 | 15.1 mi | |
| Town of Mount Airy |
9,890 | 2 | 15.1 mi | |
| Pheasant Ridge Estates |
300 | 1 | 15.8 mi | |
| Mt. Airy Nursing & Rehab |
104 | 0 | 15.9 mi |
Non-community systems in Carroll County (200: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Carroll 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.