All water systems in Maryland
2,202 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Camp Airy, Lil Strauss Found Frederick County |
294 | 0 | 0 | |
|
Dollar General Cobb Island Charles County |
294 | 1 | 0 | |
|
Worton Creek Marina INC Kent County |
290 | 0 | 0 | |
|
Taylors Island Campground Dorchester County |
289 | 0 | 0 | |
|
Church of Latter Day Saints Charles County |
285 | 1 | 0 | |
|
Camp Merryelande St. Mary's County |
281 | 0 | 0 | |
|
Churchville Rec Center Main Bldg Harford County |
280 | 1 | 0 | |
|
Gregg Neck Boat Yard Kent County |
280 | 0 | 0 | |
|
Dunkin Donuts Jarrettsville Harford County |
275 | 0 | 0 | |
|
Penn Mar Plaza and Buon Gusto Harford County |
275 | 0 | 0 | |
|
Whiteford Library Harford County |
267 | 0 | 0 | |
|
Acappella Italian Restaurant Harford County |
265 | 2 | 0 | |
|
Finksburg Public Library Carroll County |
265 | 0 | 0 | |
|
Bank Shot Bar and Grill Anne Arundel County |
262 | 1 | 0 | |
|
Grace Brethren Church West Wing Calvert County |
260 | 0 | 0 | |
|
Mechanicsville Volunteer Fire Hall St. Mary's County |
260 | 0 | 0 | |
|
Mudgett Business Center Carroll County |
260 | 0 | 0 | |
|
Oregon Ridge Park Nature Center Baltimore County |
260 | 0 | 0 | |
|
River Valley Ranch Main Ranch/kitchen Carroll County |
260 | 0 | 0 | |
|
The Peppered Pig, LLC Baltimore County |
260 | 0 | 0 | |
|
Brooms Bloom Dairy Harford County |
259 | 0 | 0 | |
|
Country Corner Snowball, INC Howard County |
259 | 0 | 0 | |
|
Dunkin Donuts Howard County |
259 | 0 | 0 | |
|
Our Lady of Sorrows Anne Arundel County |
259 | 0 | 0 | |
|
Severn River Inn Anne Arundel County |
259 | 0 | 0 | |
|
Hagerstown Snug Harbor KOA Washington County |
258 | 0 | 0 | |
|
Dollar General #21089 Washington County |
257 | 1 | 0 | |
|
Herbs on the Curb Harford County |
257 | 0 | 0 | |
|
American Legion #226 Anne Arundel County |
256 | 0 | 0 | |
|
Comus Inn Montgomery County |
256 | 2 | 0 | |
|
Crofton Go-Kart Raceway Anne Arundel County |
255 | 0 | 0 | |
|
Highs # 81 Harford County |
255 | 0 | 0 | |
|
South County Library Anne Arundel County |
255 | 0 | 0 | |
|
Larriland Farms Howard County |
252 | 0 | 0 | |
|
First Baptist Church Calvert County |
251 | 0 | 0 | |
|
Aspen Institute River House Queen Anne's County |
250 | 0 | 0 | |
|
Bear Branch Nature Center Carroll County |
250 | 0 | 0 | |
|
Buds at Silver Run Carroll County |
250 | 0 | 0 | |
|
Crosswind Church Carroll County |
250 | 0 | 0 | |
|
Dash in Westover Somerset County |
250 | 0 | 0 | |
|
Deer Park Ball Fields Carroll County |
250 | 0 | 0 | |
|
Dollar General #23869 Cecil County |
250 | 1 | 0 | |
|
Foxy Fish St. Mary's County |
250 | 0 | 0 | |
|
Harris Crab House Queen Anne's County |
250 | 0 | 0 | |
|
Kentmorr Restaurant Queen Anne's County |
250 | 0 | 0 | |
|
Lighthouse Seafood Frederick County |
250 | 0 | 0 | |
|
Melwood Recreation Center/ Camp Charles County |
250 | 1 | 0 | |
|
Piney Narrows Marina Queen Anne's County |
250 | 0 | 0 | |
|
Riverside Community Church Harford County |
250 | 1 | 0 | |
|
Skycroft Baptist Conerence Center Frederick County |
250 | 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.