All water systems in Maryland
3,216 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Deep Creek Lake Water Service Area Garrett County |
5,502 | 0 | 0 | |
|
Lavale Sanitary Commission Allegany County |
5,500 | 0 | 0 | |
|
Maryland American Water--Severn System Anne Arundel County |
5,447 | 0 | 0 | |
|
Town of Chestertown Kent County |
5,400 | 1 | 0 | |
|
Town of Middletown Frederick County |
5,132 | 0 | 0 | |
|
Midland-Lonaconing Allegany County |
5,000 | 4 | 0 | |
|
Town of Chesapeake Beach Calvert County |
5,000 | 1 | 0 | |
|
Town of Leonardtown St. Mary's County |
5,000 | 1 | 0 | |
|
Western Region Allegany Distrib. System Allegany County |
4,955 | 1 | 1 | |
|
Town of Manchester Carroll County |
4,954 | 0 | 0 | |
|
Town of Denton Caroline County |
4,848 | 0 | 0 | |
|
Chesapeake Complex Anne Arundel County |
4,785 | 0 | 0 | |
|
Town of Berlin Worcester County |
4,500 | 0 | 0 | |
|
Town of Delmar Wicomico County |
4,500 | 0 | 0 | |
|
Town of Perryville Cecil County |
4,413 | 4 | 0 | |
|
Prince Frederick Calvert County |
4,371 | 1 | 0 | |
|
Boonsboro Keedysville Washington County |
4,250 | 0 | 0 | |
|
Gaylord National Resort Prince George's County |
4,250 | 0 | 0 | |
|
City of Pocomoke City Worcester County |
4,100 | 2 | 0 | |
|
Town of Indian Head Charles County |
4,100 | 0 | 0 | |
|
MD American Water Provinces Anne Arundel County |
3,886 | 0 | 0 | |
|
Solomons Calvert County |
3,811 | 0 | 0 | |
|
Town of Charlestown Cecil County |
3,791 | 2 | 0 | |
|
Eastern Correctional Institute Somerset County |
3,500 | 1 | 0 | |
|
Elkton West Cecil County |
3,500 | 2 | 1 | |
|
Town of Centreville Queen Anne's County |
3,322 | 1 | 0 | |
|
Naval Support Facility, Indian Head Charles County |
3,321 | 0 | 0 | |
|
Town of Princess Anne Somerset County |
3,300 | 0 | 0 | |
|
Country Lakes St. Mary's County |
3,016 | 1 | 0 | |
|
Town of Mountain Lake Park Garrett County |
3,000 | 0 | 0 | |
|
Town of North Beach Calvert County |
3,000 | 2 | 0 | |
|
City of Crisfield Somerset County |
2,976 | 0 | 0 | |
|
Manor Shopping Center Baltimore County |
2,921 | 3 | 1 | |
|
Town of Emmitsburg Frederick County |
2,921 | 1 | 0 | |
|
Shoppes at Apple Greene Calvert County |
2,818 | 1 | 0 | |
|
Cedar Cove St. Mary's County |
2,728 | 1 | 0 | |
|
Mount Saint Marys University Frederick County |
2,700 | 0 | 0 | |
|
Town of St. Michaels Talbot County |
2,650 | 0 | 0 | |
|
MD American Water Pinto Allegany County |
2,615 | 0 | 0 | |
|
Fountaindale South Frederick County |
2,610 | 0 | 0 | |
|
Wawa INC Store#556 Worcester County |
2,520 | 0 | 0 | |
|
Harford Community College Main Campus Harford County |
2,500 | 1 | 0 | |
|
Town of Smithsburg Distribution System Washington County |
2,500 | 0 | 0 | |
|
McDonalds Frederick County |
2,499 | 0 | 0 | |
|
Northern Middle & High Schools Calvert County |
2,470 | 0 | 0 | |
|
Town of Federalsburg Caroline County |
2,450 | 1 | 0 | |
|
Wakefield Valley Carroll County |
2,436 | 2 | 0 | |
|
Town of Snow Hill Worcester County |
2,409 | 1 | 0 | |
|
Lake Village Townhomes Anne Arundel County |
2,400 | 0 | 0 | |
|
Town of Williamsport Distribution System Washington County |
2,400 | 1 | 0 |
About this data
Rules violated counts the rules a system was in violation of in the past three years, including monitoring and reporting lapses; one rule can carry several violations. Unresolved is the number of those rules currently in violation at EPA's latest data refresh.
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.