All water systems in Maryland
2,202 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Ernst Market Washington County |
163 | 1 | 0 | |
|
Grossnickle Church of the Brethren Frederick County |
163 | 0 | 0 | |
|
Church of Latter Day Saints Calvert County |
162 | 0 | 0 | |
|
Finksburg Exxon Carroll County |
162 | 0 | 0 | |
|
Rocks State Park Hills Picinic Grove Harford County |
162 | 0 | 0 | |
|
Patuxent Hall (king Landing Park) Calvert County |
161 | 0 | 0 | |
|
Alamo Court Motel Worcester County |
160 | 0 | 0 | |
|
Bayside Bull Anne Arundel County |
160 | 0 | 0 | |
|
Capt. Leonards Seafood Market St. Mary's County |
160 | 0 | 0 | |
|
New Hope Orthodox Presbyterian Church Frederick County |
160 | 0 | 0 | |
|
New Midway Volunteer Fire Department Frederick County |
160 | 0 | 0 | |
|
Pealstone Center-Pool Area Baltimore County |
160 | 0 | 0 | |
|
ST Peters Church and Office Bldngg Frederick County |
160 | 0 | 0 | |
|
Venue Bouchon Carroll County |
160 | 0 | 0 | |
|
Richards Fish and Crabs-New Location Harford County |
159 | 0 | 0 | |
|
Severna Park Lanes Anne Arundel County |
159 | 0 | 0 | |
|
Hereford United Methodist Church Baltimore County |
158 | 0 | 0 | |
|
Dubs Sports Harford County |
157 | 2 | 0 | |
|
Lai Baptist Church Howard County |
157 | 0 | 0 | |
|
Resurrection of Our Lord Roman Catholic Anne Arundel County |
157 | 0 | 0 | |
|
Fallston Shopping Center Harford County |
156 | 0 | 0 | |
|
Highs #34 Harford County |
156 | 0 | 0 | |
|
Loch Raven Fishing Center Baltimore County |
156 | 0 | 0 | |
|
Amalfi Coast Italian Restaurant(rustico) Queen Anne's County |
155 | 0 | 0 | |
|
Braglio Farms Baltimore County |
155 | 0 | 0 | |
|
Dunkirk Baptist Church Calvert County |
155 | 0 | 0 | |
|
Inverness Brewing, LLC Baltimore County |
155 | 0 | 0 | |
|
Middleham and ST Peters Parish Calvert County |
155 | 0 | 0 | |
|
Pirates Cove INC Anne Arundel County |
155 | 0 | 0 | |
|
Bay Ridge Marina Clubhouse Anne Arundel County |
154 | 0 | 0 | |
|
Bear Creek Bbq St. Mary's County |
154 | 0 | 0 | |
|
Big 5 Anne Arundel County |
154 | 0 | 0 | |
|
Brome Howard Inn St. Mary's County |
154 | 0 | 0 | |
|
Highs #86 Harford County |
154 | 0 | 0 | |
|
Sweeties Washington County |
154 | 0 | 0 | |
|
Tools Bar St. Mary's County |
154 | 0 | 0 | |
|
Fellowship Chapel Harford County |
153 | 0 | 0 | |
|
Saint Clements Island-Pot. River Museum St. Mary's County |
153 | 0 | 0 | |
|
Swan Harbor Farm Harford County |
153 | 1 | 0 | |
|
Eastern Shore Bible Church Kent County |
152 | 1 | 0 | |
|
Newburg Market Charles County |
152 | 2 | 0 | |
|
North Harford Baptist Church Harford County |
152 | 0 | 0 | |
|
Shell Oil Co(mt. Airy Shell) Frederick County |
152 | 0 | 0 | |
|
Slate Farm Whiteford Harford County |
152 | 0 | 0 | |
|
Jarrettsville Fire CO Harford County |
151 | 1 | 0 | |
|
Saint Peter Claver St. Mary's County |
151 | 1 | 0 | |
|
ST Matthews Umc Anne Arundel County |
151 | 0 | 0 | |
|
5 West Cafe Frederick County |
150 | 0 | 0 | |
|
Adams Ribs (of Calvert County) Calvert County |
150 | 0 | 0 | |
|
Broadcreek Camp Oest Harford County |
150 | 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.