All water systems in Maryland
2,202 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Lena's Bar & Grill Queen Anne's County |
100 | 0 | 0 | |
|
Lighthouse Sound Comfort Station Worcester County |
100 | 0 | 0 | |
|
Masjid Ibrahim Harford Islamic Center Harford County |
100 | 1 | 0 | |
|
MC Innes Center,barron and Verde Dds, PA Baltimore County |
100 | 0 | 0 | |
|
Mimis Station (cjs Food Store) Calvert County |
100 | 0 | 0 | |
|
Monocacy Crossing Frederick County |
100 | 0 | 0 | |
|
Mt. Olive United Methodist Church Calvert County |
100 | 0 | 0 | |
|
New Market Sunoco Frederick County |
100 | 0 | 0 | |
|
Old Westminster Winery Carroll County |
100 | 0 | 0 | |
|
Ole Mink Farm Frederick County |
100 | 0 | 0 | |
|
Otzi Mediterranean Market & Entery Carroll County |
100 | 0 | 0 | |
|
Parkers Produce and Seafood Wicomico County |
100 | 0 | 0 | |
|
Patapsco State Park (mckeldin B) Carroll County |
100 | 0 | 0 | |
|
Plumpton Park Zoo Grounds Cecil County |
100 | 1 | 0 | |
|
Plumpton Park Zoo Snack Bar Cecil County |
100 | 1 | 0 | |
|
Potomac Swim and Tennis Montgomery County |
100 | 0 | 0 | |
|
Price Community Center Queen Anne's County |
100 | 0 | 0 | |
|
PU Pupuseria Queen Anne's County |
100 | 0 | 0 | |
|
Queenstown Mart Queen Anne's County |
100 | 0 | 0 | |
|
Reisterstown Moose Lodge #1577 Baltimore County |
100 | 0 | 0 | |
|
Rick's Liquors Cecil County |
100 | 2 | 0 | |
|
River Valley Ranch Pool Carroll County |
100 | 0 | 0 | |
|
Rocky Ridge Vfd Frederick County |
100 | 0 | 0 | |
|
Romancoke Fishing Pier Queen Anne's County |
100 | 0 | 0 | |
|
Scotts II Charles County |
100 | 1 | 0 | |
|
Silver Swan Restaurant Queen Anne's County |
100 | 0 | 0 | |
|
South Potomac Church Charles County |
100 | 0 | 0 | |
|
Southbound Alley Wicomico County |
100 | 1 | 0 | |
|
Southern Maryland Youth Organization Charles County |
100 | 1 | 0 | |
|
ST Josephs on Carrolton Manor Frederick County |
100 | 0 | 0 | |
|
St. Johns Lutheran Church Carroll County |
100 | 0 | 0 | |
|
St. Lukes Winters Lutheran Church Carroll County |
100 | 0 | 0 | |
|
Sunshine General Store Montgomery County |
100 | 2 | 0 | |
|
Taylorsville Umc Carroll County |
100 | 0 | 0 | |
|
The Key School Fusco Park Anne Arundel County |
100 | 1 | 0 | |
|
The Little Red Barn Ice Creamcafe Frederick County |
100 | 0 | 0 | |
|
Tiger Mart Exxon (mt. Airy) Frederick County |
100 | 0 | 0 | |
|
Tony's Pizza Carroll County |
100 | 0 | 0 | |
|
Tree Trekkers Frederick County |
100 | 0 | 0 | |
|
Tri-County Baptist Church Montgomery County |
100 | 0 | 0 | |
|
Uncle Bobs Western Corral Cecil County |
100 | 0 | 0 | |
|
Whitaker Mill Andharford Gymnastics Harford County |
100 | 0 | 0 | |
|
White Sands Restaurant Calvert County |
100 | 0 | 0 | |
|
Woodlawn Family Camping Wicomico County |
100 | 0 | 0 | |
|
Wye Camp and S.e.w. Friel Queen Anne's County |
100 | 0 | 0 | |
|
Zion United Methodist Church St. Mary's County |
100 | 0 | 0 | |
|
First Baptist Church of Laplata Charles County |
99 | 0 | 0 | |
|
Merry Meadows Lower Restroom Well #6 Baltimore County |
97 | 0 | 0 | |
|
Long Cove Marina Kent County |
96 | 1 | 0 | |
|
Maryland Line U M Church Baltimore County |
96 | 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.