All water systems in Maryland
3,216 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Charlotte Hall VA Home St. Mary's County |
270 | 1 | 0 | |
|
Grandview Haven St. Mary's County |
269 | 1 | 0 | |
|
Frederick Baptist Church & School Frederick County |
267 | 2 | 1 | |
|
Lewistown Elementary Frederick County |
267 | 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 | |
|
Warwick Mushroom Farm Cecil County |
265 | 1 | 0 | |
|
Bank Shot Bar and Grill Anne Arundel County |
262 | 1 | 0 | |
|
Fountain Rock Elementary Washington County |
260 | 0 | 0 | |
|
Grace Brethren Church West Wing Calvert County |
260 | 0 | 0 | |
|
Mechanicsville Volunteer Fire Hall St. Mary's County |
260 | 0 | 0 | |
|
Millington Distribution System Kent County |
260 | 1 | 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 | |
|
Westside Primary School Wicomico County |
260 | 1 | 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 | |
|
White Rock Frederick County |
256 | 0 | 0 | |
|
Whitley Park Condominiums Montgomery County |
256 | 0 | 0 | |
|
Crofton Go-Kart Raceway Anne Arundel County |
255 | 0 | 0 | |
|
Highs # 81 Harford County |
255 | 0 | 0 | |
|
Holiday Inn Express Ocean City Worcester 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 | |
|
Paris Oaks / Days End Calvert County |
251 | 0 | 0 | |
|
Angelica Nurseries, Inc. Kent County |
250 | 0 | 0 | |
|
Aspen Institute River House Queen Anne's County |
250 | 0 | 0 | |
|
Bear Branch Nature Center Carroll County |
250 | 0 | 0 | |
|
Bloch & Guggenheimer Co. Dorchester County |
250 | 2 | 0 | |
|
Buds at Silver Run Carroll County |
250 | 0 | 0 | |
|
Campus Hills Water Works Harford County |
250 | 1 | 0 | |
|
Conowingo Mobile Home Park Cecil County |
250 | 1 | 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 | |
|
Dunkirk Business Center Calvert County |
250 | 1 | 0 | |
|
Eden Mobile Home Park Somerset 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.