County · Maryland
Calvert County, Maryland: drinking water records
This overview covers 12 ZIP codes and 29 community water systems in Calvert County. It also stands in for 2 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Chesapeake Ranch Estates MD0040004 | 9,500 | 240 | 0 | 0 | 0 ppb |
| Town of Chesapeake Beach MD0040003 | 5,000 | 180 | 0 | 0 | 0 ppb |
| Prince Frederick MD0040011 | 4,371 | 120 | 0 | 0 | 0 ppb |
| Solomons MD0040027 | 3,811 | 120 | 0 | 0 | 0 ppb |
| Town of North Beach MD0040030 | 3,000 | 0 | 0 | 1 | 0 ppb |
| The Calverton School MD1040022 | 461 | 0 | 0 | 1 | 0 ppb |
| Regency Manor Mobile Home Park MD0040202 | 224 | 0 | 0 | 1 | 0 ppb |
| B&l Mobile Home Park MD0040209 | 65 | 0 | 0 | 1 | 6.5 ppb |
| Pine Trailer Park MD0040210 | 65 | 0 | 0 | 1 | 0 ppb |
| Beaches Water Co-Operative MD0040009 | 2,000 | 0 | 0 | 0 | 1.5 ppb |
| Scientists Cliffs MD0040014 | 1,425 | 0 | 0 | 0 | 0 ppb |
| Chesapeake Heights (Bayside Forest) MD0040018 | 1,190 | 0 | 0 | 0 | 3 ppb |
| Summit/Highlands MD0040026 | 1,108 | 0 | 0 | 0 | 0 ppb |
| Cross Point Subdivision MD0040052 | 434 | 0 | 0 | 0 | 0 ppb |
| Cavalier Country MD0040002 | 381 | 0 | 0 | 0 | 0 ppb |
| Shores of Calvert MD0040015 | 361 | 0 | 0 | 0 | 0 ppb |
| Calvert Beach - Decatur Street MD0040024 | 350 | 0 | 0 | 0 | 0 ppb |
| St. Leonard MD0040013 | 350 | 0 | 0 | 0 | 0 ppb |
| Kenwood Beach MD0040007 | 338 | 0 | 0 | 0 | 0 ppb |
| Marley Run MD0040053 | 290 | 0 | 0 | 0 | 0 ppb |
| Paris Oaks / Days End MD0040010 | 251 | 0 | 0 | 0 | 0 ppb |
| Lakewood MD0040008 | 203 | 0 | 0 | 0 | 0 ppb |
| Western Shores MD0040016 | 200 | 0 | 0 | 0 | 0 ppb |
| Walnut Creek MD0040035 | 158 | 0 | 0 | 0 | 0 ppb |
| Hunting Hills MD0040006 | 124 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Calvert County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 20615, 20689.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.