All water systems in Maryland
3,216 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Assateague State Park Campground Worcester County |
345 | 0 | 0 | |
|
Autumn Lake Healthcare Ruxton Baltimore County |
345 | 0 | 0 | |
|
Deale Elementary Anne Arundel County |
345 | 1 | 0 | |
|
Pomunk Water Company Distribution System Charles County |
340 | 1 | 0 | |
|
Copperfield Frederick County |
338 | 0 | 0 | |
|
Kenwood Beach Calvert County |
338 | 0 | 0 | |
|
Leonardtown S.h.a./ S.h.a. Maint. St. Mary's County |
336 | 0 | 0 | |
|
Antietam Recreation Camp Washington County |
335 | 0 | 0 | |
|
Mount Zion Umc at Laurel Grove St. Mary's County |
335 | 0 | 0 | |
|
Bullocks Country Family Restaurant Carroll County |
334 | 0 | 0 | |
|
Trader Lees Village Shops Worcester County |
334 | 0 | 0 | |
|
Cheltenham Boys Village Prince George's County |
330 | 1 | 0 | |
|
Loch Raven VA Medical Center Baltimore city County |
330 | 0 | 0 | |
|
Park Hall Liquors and Deli St. Mary's County |
330 | 0 | 0 | |
|
Town and Country Liquors Talbot County |
330 | 0 | 0 | |
|
Mechanicsville Moose Lodge #495 St. Mary's County |
327 | 0 | 0 | |
|
Camp Fretterd Military Reservation Baltimore County |
325 | 0 | 0 | |
|
Grace Medical Center Baltimore city County |
325 | 0 | 0 | |
|
Newark Worcester County |
325 | 0 | 0 | |
|
Red Roost Wicomico County |
325 | 0 | 0 | |
|
Whispering Pines Mobile Home Park Cecil County |
325 | 1 | 0 | |
|
White Marsh Elementary School St. Mary's County |
325 | 0 | 0 | |
|
Smithsonian Enviro. Research Center Anne Arundel County |
323 | 0 | 0 | |
|
Konstantines Greek Taverna Howard County |
322 | 0 | 0 | |
|
Boarmans Meat Market Howard County |
320 | 0 | 0 | |
|
Cecil Woods M.h.p. Distribution System Cecil County |
320 | 2 | 0 | |
|
Chesapeake Landing Restaurant Talbot County |
320 | 1 | 0 | |
|
Huntingtown Vol Fire Dept Calvert County |
320 | 0 | 0 | |
|
Idlewood Park Charles County |
320 | 0 | 0 | |
|
Kfc Odenton Anne Arundel County |
320 | 2 | 0 | |
|
Lankford Bay Marina Store Kent County |
320 | 2 | 0 | |
|
Liberty Christian School Baltimore County |
320 | 1 | 0 | |
|
Crabs to GO and Raceway Citgo Worcester County |
318 | 0 | 0 | |
|
Indian Acres Club of Chesapeake Bay Cecil County |
316 | 0 | 0 | |
|
Summit Lake Camp Frederick County |
316 | 0 | 0 | |
|
Hillendale Country Club Baltimore County |
315 | 1 | 0 | |
|
Lutheran Village at Miller's Grant Howard County |
315 | 3 | 0 | |
|
Village Square Shopping Center Harford County |
315 | 0 | 0 | |
|
Bel Alton Charles County |
311 | 2 | 0 | |
|
Arctic Circle Drive-In Harford County |
310 | 0 | 0 | |
|
Avenue 7th District Volunteer Fire Hall St. Mary's County |
310 | 0 | 0 | |
|
Bolder Grill Howard County |
310 | 0 | 0 | |
|
Breezy Point Bathhouse Calvert County |
310 | 0 | 0 | |
|
Chaptico Market St. Mary's County |
310 | 0 | 0 | |
|
Meadowcroft Exxon Baltimore County |
310 | 0 | 0 | |
|
Mount Aviat Academy Cecil County |
310 | 0 | 0 | |
|
Northwestern Elementary School Wicomico County |
310 | 1 | 0 | |
|
Sams Market and Pizza Boli Anne Arundel County |
310 | 0 | 0 | |
|
Dublin Elementary School Harford County |
308 | 1 | 0 | |
|
Dunkin Donut Baltimore County |
308 | 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.