Maryland
Calvert County drinking water quality
226 active public water systems serve 83,691 people in Calvert County. 177 are compliant, 49 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 2 carry a health flag.
Needs attention
Community water systems
30 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Chesapeake Ranch Estates |
9,500 | 0 | 0 | |
|
Town of Chesapeake Beach |
5,000 | 1 | 0 | |
|
Prince Frederick |
4,371 | 1 | 0 | |
|
Solomons |
3,811 | 0 | 0 | |
|
Town of North Beach |
3,000 | 2 | 0 | |
|
Beaches Water Co-Operative |
2,000 | 0 | 0 | |
|
Scientists Cliffs |
1,425 | 1 | 0 | |
|
Chesapeake Heights (bayside Forest) |
1,190 | 0 | 0 | |
|
Summit/highlands |
1,108 | 0 | 0 | |
|
The Calverton School |
461 | 3 | 0 | |
|
Cross Point Subdivision |
434 | 0 | 0 | |
|
Cavalier Country |
381 | 0 | 0 | |
|
Shores of Calvert |
361 | 0 | 0 | |
|
Calvert Beach Decatur Street |
350 | 1 | 0 | |
|
St. Leonard |
350 | 0 | 0 | |
|
Kenwood Beach |
338 | 0 | 0 | |
|
Marley Run |
290 | 0 | 0 | |
|
Paris Oaks / Days End |
251 | 0 | 0 | |
|
Regency Manor Mobile Home Park |
224 | 3 | 1 | |
|
Lakewood |
203 | 0 | 0 | |
|
Western Shores |
200 | 1 | 0 | |
|
Walnut Creek |
158 | 0 | 0 | |
|
Hunting Hills |
124 | 0 | 0 | |
|
Calvert Beach / Forest Trail |
100 | 1 | 0 | |
|
White Sands |
82 | 0 | 0 | |
|
Calvert Mobile Home Park |
80 | 0 | 0 | |
|
Tara Subdivision |
68 | 0 | 0 | |
|
B&l Mobile Home Park |
65 | 2 | 0 | |
|
Pine Trailer Park |
65 | 4 | 0 | |
|
Tapestry North |
60 | 0 | 0 |
Non-community systems (196: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
Inactive systems (195, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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. Retrieved from ECHO on Oct 11, 2026.