All water systems in Maryland
2,202 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Mountaindale Convenience Store # 2 Frederick County |
812 | 0 | 0 | |
|
Royal Farm Store #1 Harford County |
812 | 0 | 0 | |
|
Royal Farms Store #32 Anne Arundel County |
809 | 0 | 0 | |
|
Dunkin Donuts Anne Arundel County |
808 | 0 | 0 | |
|
Calvert County Fairground Calvert County |
807 | 0 | 0 | |
|
Royal Farms #62 Carroll County |
806 | 0 | 0 | |
|
Seven Eleven # 21067 Charlotte Hall St. Mary's County |
805 | 0 | 0 | |
|
Point Lookout State Park North St. Mary's County |
803 | 0 | 0 | |
|
Dollar General (no. 14630) Anne Arundel County |
800 | 0 | 0 | |
|
Hoopers Restaurant Worcester County |
800 | 0 | 0 | |
|
Seven-Eleven Hampstead Carroll County |
800 | 0 | 0 | |
|
Swallow Falls State Park Garrett County |
791 | 0 | 0 | |
|
Mary Miller LLC Frederick County |
780 | 0 | 0 | |
|
McDonalds of Lisbon Howard County |
735 | 0 | 0 | |
|
Hagerstown Speedway Washington County |
732 | 0 | 0 | |
|
Buttonwood Beach RV Resort Cecil County |
725 | 0 | 0 | |
|
Runway Liquors Talbot County |
720 | 0 | 0 | |
|
Dunkin Gambrills Anne Arundel County |
718 | 0 | 0 | |
|
Savory Deli and Market Harford County |
714 | 0 | 0 | |
|
Lower Shore Tourism Center Worcester County |
713 | 0 | 0 | |
|
Royal Farms Store #56 Anne Arundel County |
708 | 0 | 0 | |
|
Harriet Elizabeth Brown Community Center Calvert County |
700 | 0 | 0 | |
|
Jiffy Mart Finksburg Carroll County |
700 | 0 | 0 | |
|
Patapsco State Park ( McKeldin A) Carroll County |
700 | 0 | 0 | |
|
Rodney Scout Camp Cecil County |
700 | 1 | 0 | |
|
Glenwood Library Howard County |
671 | 0 | 0 | |
|
Catoctin Mountain Nat. Park-Misty Mount Frederick County |
668 | 0 | 0 | |
|
East Coast Fuel, LLC Wicomico County |
650 | 0 | 0 | |
|
Bayshore Campground Kent County |
636 | 1 | 0 | |
|
Frontiertown Community Ctr + SW Sites Worcester County |
624 | 0 | 0 | |
|
Frontiertown Lazy River Bathhouse Worcester County |
620 | 0 | 0 | |
|
Frontiertown Bathhouse # 1 Worcester County |
618 | 0 | 0 | |
|
Frontiertown Bathhouse # 3 Worcester County |
618 | 0 | 0 | |
|
The Shoppes at Waysons Corner Anne Arundel County |
615 | 0 | 0 | |
|
Town Center Amoco Calvert County |
615 | 0 | 0 | |
|
Immaculate Conception Roman Cath Chur St. Mary's County |
614 | 0 | 0 | |
|
Fallston Library Harford County |
610 | 0 | 0 | |
|
Shore Stop #219 Worcester County |
609 | 1 | 0 | |
|
Holy Family Cath. Church Anne Arundel County |
607 | 0 | 0 | |
|
Mardela Goose Creek INC Wicomico County |
607 | 0 | 0 | |
|
Camp Louise Washington County |
606 | 0 | 0 | |
|
Dash in Owings Calvert County |
606 | 0 | 0 | |
|
Jefferson Market Frederick County |
606 | 0 | 0 | |
|
Highs #1 Whiteford Harford County |
605 | 1 | 0 | |
|
U5 Foods Bethlehem Caroline County |
604 | 0 | 0 | |
|
Saint Josephs Catholic Church St. Mary's County |
602 | 0 | 0 | |
|
Carraba's Italian Grill Worcester County |
600 | 0 | 0 | |
|
Drcc-Damascus Road Community Church Frederick County |
600 | 0 | 0 | |
|
Mountain View Community Church Frederick County |
600 | 0 | 0 | |
|
Roaring Run Lions Club Carroll County |
600 | 0 | 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.