Water quality in St. Leonard, Maryland
St. Leonard is in Calvert County. 226 active public water systems serve the county; 49 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Calvert County
29 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Calvert Beach Decatur Street |
350 | 1 | 0.4 mi | |
| Calvert Beach / Forest Trail |
100 | 1 | 0.8 mi | |
| Beaches Water Co-Operative |
2,000 | 0 | 1.2 mi | |
| Western Shores |
200 | 1 | 1.6 mi | |
| Kenwood Beach |
338 | 0 | 2.1 mi | |
| Scientists Cliffs |
1,425 | 1 | 3.3 mi | |
| White Sands |
82 | 0 | 3.4 mi | |
| Pine Trailer Park |
65 | 4 | 4.8 mi | |
| Chesapeake Heights (bayside Forest) |
1,190 | 0 | 7.0 mi | |
| Prince Frederick |
4,371 | 1 | 7.3 mi | |
| Calvert Mobile Home Park |
80 | 0 | 8.3 mi | |
| B&l Mobile Home Park |
65 | 2 | 8.7 mi | |
| Chesapeake Ranch Estates |
9,500 | 0 | 8.8 mi | |
| Solomons |
3,811 | 0 | 9.2 mi | |
| The Calverton School |
461 | 3 | 10.5 mi | |
| Hunting Hills |
124 | 0 | 10.6 mi | |
| Marley Run |
290 | 0 | 11.1 mi | |
| Tara Subdivision |
68 | 0 | 12.3 mi | |
| Walnut Creek |
158 | 0 | 12.8 mi | |
| Town of Chesapeake Beach |
5,000 | 1 | 15.7 mi | |
| Summit/highlands |
1,108 | 0 | 16.6 mi | |
| Town of North Beach |
3,000 | 2 | 16.7 mi | |
| Tapestry North |
60 | 0 | 17.2 mi | |
| Paris Oaks / Days End |
251 | 0 | 17.3 mi | |
| Cross Point Subdivision |
434 | 0 | 18.2 mi |
Non-community systems in Calvert County (196: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
About this data
Water systems are matched to Calvert County, nearest to St. Leonard first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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.