All water systems in Maryland
2,202 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Valley Brook Swim Club Harford County |
400 | 0 | 0 | |
|
Tolchester Marina Inc. Kent County |
395 | 1 | 0 | |
|
Cattail Creek Country Club Howard County |
390 | 0 | 0 | |
|
Dominos Pizza and Subway Hampstead Carroll County |
385 | 0 | 0 | |
|
Jarrettsville Plaza Shopping Center Harford County |
383 | 0 | 0 | |
|
Chester River Yacht Club Kent County |
380 | 0 | 0 | |
|
White Rock Yachting Center Well #1 Anne Arundel County |
380 | 0 | 0 | |
|
Dunkin Donuts Woodbine Howard County |
363 | 0 | 0 | |
|
Highs of Fulton Howard County |
363 | 0 | 0 | |
|
Royal Farms Store Howard County |
362 | 0 | 0 | |
|
Friendship Baptist Church Howard County |
357 | 0 | 0 | |
|
Ringgold Church of Christ Washington County |
357 | 0 | 0 | |
|
Urbana Vfd Frederick County |
355 | 0 | 0 | |
|
Tiffanee & CO Bakery/goodwill Harford County |
354 | 0 | 0 | |
|
ST Ignatius Church and ST Thomas Manor Charles County |
353 | 1 | 0 | |
|
Hardees and Kent Island Queen Anne's County |
351 | 0 | 0 | |
|
Carroll Fuel (urbana Pike) Frederick County |
350 | 0 | 0 | |
|
Assateague State Park Campground Worcester County |
345 | 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 | |
|
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 | |
|
Red Roost Wicomico County |
325 | 0 | 0 | |
|
Konstantines Greek Taverna Howard County |
322 | 0 | 0 | |
|
Boarmans Meat Market Howard County |
320 | 0 | 0 | |
|
Chesapeake Landing Restaurant Talbot County |
320 | 1 | 0 | |
|
Huntingtown Vol Fire Dept Calvert County |
320 | 0 | 0 | |
|
Kfc Odenton Anne Arundel County |
320 | 2 | 0 | |
|
Lankford Bay Marina Store Kent County |
320 | 2 | 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 | |
|
Village Square Shopping Center Harford County |
315 | 0 | 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 | |
|
Sams Market and Pizza Boli Anne Arundel County |
310 | 0 | 0 | |
|
Dunkin Donut Baltimore County |
308 | 0 | 0 | |
|
Fairview Library Calvert County |
308 | 0 | 0 | |
|
Our Lady of the Chesapeake Anne Arundel County |
308 | 1 | 0 | |
|
Running Hares Vinyard Calvert County |
308 | 0 | 0 | |
|
The Fill'er Up/ Maryland Line Service CT Baltimore County |
308 | 0 | 0 | |
|
Wawa Mechanicsville #583 St. Mary's 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.