All water systems in Maryland
3,216 systems
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Scientists Cliffs Calvert County |
1,425 | 1 | 0 | |
|
Southern High School Anne Arundel County |
1,400 | 1 | 0 | |
|
U.s.d.a. Agricultural Research Center Prince George's County |
1,400 | 1 | 1 | |
|
Town of Sharpsburg Washington County |
1,360 | 0 | 0 | |
|
Crownsville Hospital Center Anne Arundel County |
1,348 | 0 | 0 | |
|
North Harford High School Harford County |
1,346 | 1 | 0 | |
|
Highs of Cooksville Howard County |
1,321 | 0 | 0 | |
|
Boones Mobile Estates Anne Arundel County |
1,315 | 0 | 0 | |
|
Stevenson University Baltimore County |
1,313 | 1 | 0 | |
|
UM Capital Region Medical Center Prince George's County |
1,309 | 0 | 0 | |
|
Hereford High School Baltimore County |
1,300 | 0 | 0 | |
|
Town of Funkstown Distribution System Washington County |
1,300 | 0 | 0 | |
|
Wicomico Shores St. Mary's County |
1,262 | 1 | 0 | |
|
South Carroll High School Carroll County |
1,250 | 0 | 0 | |
|
Fairland Crossing Apartments Montgomery County |
1,248 | 0 | 0 | |
|
Schucks Corner Sheetz Harford County |
1,233 | 0 | 0 | |
|
McDonalds Harford County |
1,230 | 1 | 0 | |
|
College of Southern MD Main Campus Charles County |
1,220 | 1 | 0 | |
|
Leonardtown Middle School & Forrest Tech St. Mary's County |
1,200 | 0 | 0 | |
|
Sherwood Forest Water Company Anne Arundel County |
1,200 | 0 | 0 | |
|
Solomons Recreation Center (navfac-Wash) Calvert County |
1,200 | 0 | 0 | |
|
Town of Trappe Talbot County |
1,200 | 0 | 0 | |
|
Webster Field Annex, ST Inigoes (navfac) St. Mary's County |
1,200 | 1 | 0 | |
|
Chesapeake Heights (bayside Forest) Calvert County |
1,190 | 0 | 0 | |
|
Harford Technical High School Harford County |
1,187 | 1 | 0 | |
|
Henry E. Lackey High School Charles County |
1,187 | 0 | 0 | |
|
Youths Benefit Elementary School Harford County |
1,175 | 1 | 0 | |
|
Greenbrier St. Mary's County |
1,161 | 1 | 0 | |
|
Greenbrier State Park Washington County |
1,150 | 0 | 0 | |
|
Southern Middle School Anne Arundel County |
1,150 | 1 | 0 | |
|
Highfield Washington County |
1,141 | 0 | 0 | |
|
Royal Farms #87 Conowingo Cecil County |
1,122 | 0 | 0 | |
|
Fallston High School Harford County |
1,113 | 1 | 0 | |
|
Summit/highlands Calvert County |
1,108 | 0 | 0 | |
|
Rising Sun High School Cecil County |
1,102 | 0 | 0 | |
|
National Institutes of Health Montgomery County |
1,100 | 1 | 0 | |
|
North Harford Middle School Harford County |
1,084 | 0 | 0 | |
|
Spring Ridge Middle School St. Mary's County |
1,075 | 0 | 0 | |
|
Hereford Middle School Baltimore County |
1,050 | 0 | 0 | |
|
Margaret Brent Middle School St. Mary's County |
1,050 | 0 | 0 | |
|
Maurice J. McDonough High School Charles County |
1,050 | 0 | 0 | |
|
Fallston Middle School Harford County |
1,041 | 0 | 0 | |
|
Sam Hill Estates Frederick County |
1,036 | 0 | 0 | |
|
Royal Farms #185 Baltimore County |
1,031 | 0 | 0 | |
|
Bayside-Queenslanding Stevensville · Queen Anne's County |
1,030 | 0 | 0 | |
|
North Caroline High School Caroline County |
1,028 | 0 | 0 | |
|
Colonel Richardson Mid & High School Caroline County |
1,022 | 0 | 0 | |
|
Town of Hebron Wicomico County |
1,022 | 0 | 0 | |
|
Town of Willards Wicomico County |
1,021 | 3 | 0 | |
|
AC and T Big Pool Washington County |
1,018 | 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.