All water systems in Maryland
2,202 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
The Barn @ Pleasant Acres Calvert County |
494 | 0 | 0 | |
|
Great Oak Landing Marina Kent County |
490 | 0 | 0 | |
|
American Legion Post #29 Caroline County |
483 | 0 | 0 | |
|
Darnestown Swim and Raquet Club Montgomery County |
470 | 0 | 0 | |
|
Huntingtown Professional Center, LLC Calvert County |
470 | 2 | 0 | |
|
Henson Boy Scout Reservation Dorchester County |
465 | 0 | 0 | |
|
Patuxent Presbyterian Church St. Mary's County |
464 | 0 | 0 | |
|
St. Ignatius of Loyola Catholic Church Frederick County |
455 | 0 | 0 | |
|
7-Eleven Thurmont#28960 Frederick County |
450 | 0 | 0 | |
|
Christian Life Center Frederick County |
450 | 0 | 0 | |
|
Dollar General #13896 Cecil County |
450 | 1 | 0 | |
|
Echo Hill Camp Kent County |
450 | 0 | 0 | |
|
Southern Calvert Baptist Church Calvert County |
450 | 1 | 0 | |
|
Echo Hill Outdoor School Kent County |
434 | 0 | 0 | |
|
Frontiertown Theme Park Worcester County |
430 | 0 | 0 | |
|
Queen Annes Rest Stop 301 Queen Anne's County |
430 | 0 | 0 | |
|
South Carroll Swim Club Carroll County |
425 | 0 | 0 | |
|
The Valley Inn Baltimore County |
425 | 0 | 0 | |
|
Yellowfin Steak and Fish House Anne Arundel County |
425 | 0 | 0 | |
|
Camp Puhtok for Boys and Girls Baltimore County |
420 | 0 | 0 | |
|
Circle D Farm Club House Howard County |
415 | 0 | 0 | |
|
Severna Park Racquet & Fitness Club Anne Arundel County |
412 | 0 | 0 | |
|
Highs of Glenelg Howard County |
409 | 0 | 0 | |
|
Kings Landing Pool Calvert County |
408 | 0 | 0 | |
|
Results Fitness Owings Calvert County |
408 | 0 | 0 | |
|
Woodberry Crossing Baltimore County |
408 | 0 | 0 | |
|
Bethel Way of the Cross (newer Bldg) Calvert County |
406 | 0 | 0 | |
|
EZ Quick Food Marketand Dunkin Donuts Harford County |
406 | 0 | 0 | |
|
Hollywood Volunteer Fire Hall St. Mary's County |
406 | 0 | 0 | |
|
Quiet Waters Park Wells # 1 and # 2 Anne Arundel County |
406 | 0 | 0 | |
|
Easton Exxon Talbot County |
404 | 0 | 0 | |
|
Dollar General Street #14890 Harford County |
403 | 0 | 0 | |
|
Seven Eleven # 20835 Mechanicsville St. Mary's County |
403 | 0 | 0 | |
|
Our Lady of the Wayside Church St. Mary's County |
402 | 0 | 0 | |
|
Saint Francis Xavier Church St. Mary's County |
402 | 0 | 0 | |
|
Bfs Foods Garrett County |
400 | 0 | 0 | |
|
Church of Jesus Christ of Lds MT Airy Carroll County |
400 | 0 | 0 | |
|
Crown Sport Center Wicomico County |
400 | 0 | 0 | |
|
Dollar General #14452 Anne Arundel County |
400 | 0 | 0 | |
|
Edgeley Grove Park Annies Play Ground Harford County |
400 | 0 | 0 | |
|
Green Meadows Cultural Events Frederick County |
400 | 0 | 0 | |
|
Green Meadows Petting Farm Frederick County |
400 | 0 | 0 | |
|
Keymar Convenience Carroll County |
400 | 0 | 0 | |
|
Royal Farm Store #95 Harford County |
400 | 0 | 0 | |
|
Royal Farms #208 Queen Anne's County |
400 | 0 | 0 | |
|
Royal Farms Kingstown #18 Queen Anne's County |
400 | 0 | 0 | |
|
Ruhlman Brewery, LLC Carroll County |
400 | 0 | 0 | |
|
Smokey Glen Farm Picnic Pavillion Montgomery County |
400 | 1 | 0 | |
|
Smokey Glen Farm Grove Area Montgomery County |
400 | 0 | 0 | |
|
Tuckahoe ST Park (lake) Caroline County |
400 | 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.