All water systems in Maryland
3,216 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Saint Josephs Catholic Church St. Mary's County |
602 | 0 | 0 | |
|
Benjamin Banneker Elementary School St. Mary's County |
600 | 0 | 0 | |
|
Bridge Pointe-Kent Island Village Stevensville · Queen Anne's County |
600 | 0 | 0 | |
|
Carraba's Italian Grill Worcester County |
600 | 0 | 0 | |
|
Drcc-Damascus Road Community Church Frederick County |
600 | 0 | 0 | |
|
Grasonville Queen Anne's County |
600 | 0 | 0 | |
|
Hollywood Elementary School St. Mary's County |
600 | 0 | 0 | |
|
Mechanicsville Elementary Carroll County |
600 | 0 | 0 | |
|
Mountain View Community Church Frederick County |
600 | 0 | 0 | |
|
Oyster Cove Queen Anne's County |
600 | 0 | 0 | |
|
Roaring Run Lions Club Carroll County |
600 | 0 | 0 | |
|
Royal Farms #80, Queen Anne Queen Anne's County |
600 | 0 | 0 | |
|
Dayton Oaks Elementary School Howard County |
595 | 0 | 0 | |
|
Cunningham Falls Houck Area Frederick County |
577 | 0 | 0 | |
|
Forrest Farm Subdivision St. Mary's County |
577 | 1 | 0 | |
|
Catoctin Wildlife Preserve & Zoo Frederick County |
575 | 0 | 0 | |
|
Keswick Multi-Care Center Baltimore city County |
575 | 1 | 0 | |
|
Town of Vienna Dorchester County |
573 | 0 | 0 | |
|
Appeal Elementary School Calvert County |
569 | 0 | 0 | |
|
Laurel Ridge St. Mary's County |
560 | 1 | 0 | |
|
Town of Galena Kent County |
560 | 1 | 0 | |
|
New Hope 7th-Day Adventist Church Howard County |
558 | 0 | 0 | |
|
Charles County Gardens Water Charles County |
551 | 1 | 0 | |
|
Angels Food Market Anne Arundel County |
550 | 0 | 0 | |
|
Dash in Food Store Charles County |
550 | 1 | 0 | |
|
Good to GO (funny Farm) Garrett County |
550 | 0 | 0 | |
|
Yogi Bears Jellystone Park Washington County |
541 | 0 | 0 | |
|
Waysons Mobile Court Anne Arundel County |
540 | 2 | 0 | |
|
Sparks Elementary School Baltimore County |
537 | 0 | 0 | |
|
St. Michaels Market Talbot County |
535 | 0 | 0 | |
|
Town of Secretary Dorchester County |
535 | 0 | 0 | |
|
Inwood Village Center Howard County |
534 | 1 | 0 | |
|
North Bend Elementary School Harford County |
534 | 3 | 0 | |
|
Your Journey Child Care Howard County |
533 | 0 | 0 | |
|
Shad Landing/pocomoke River State Park Worcester County |
530 | 0 | 0 | |
|
Jarrettsville Elementary Harford County |
528 | 2 | 0 | |
|
New Life Church Calvert County |
525 | 0 | 0 | |
|
Hereford Plaza (michaels Pizza, 7-11) Baltimore County |
520 | 1 | 0 | |
|
New Life Wesleyan Church la Plata Charles County |
520 | 0 | 0 | |
|
7-Eleven #28953 and Deale Subway Anne Arundel County |
517 | 0 | 0 | |
|
Shady Side Elementary Anne Arundel County |
517 | 2 | 1 | |
|
Persimmon Hills St. Mary's County |
514 | 1 | 0 | |
|
Bryantown Mall Charles County |
512 | 2 | 0 | |
|
Talbot County Community Center Talbot County |
512 | 0 | 0 | |
|
Wilderness Run St. Mary's County |
511 | 2 | 0 | |
|
Annapolis Area Christian School Anne Arundel County |
510 | 0 | 0 | |
|
Dickerson Market Montgomery County |
510 | 0 | 0 | |
|
Potomac Speedway St. Mary's County |
510 | 0 | 0 | |
|
Warehouse Cinemas Leitersburg Washington County |
510 | 0 | 0 | |
|
Bowens Grocery Calvert County |
509 | 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.