Public Water Systems
460 active public water systems in DE, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
| Bylers Store (West Dover) | Dover, DE | 601 | 0 | - |
| Cedar Village LLC | Rehoboth Beach, DE | 600 | 22 | - |
| Cape Windsor Community Association Inc | Selbyville, DE | 600 | 32 | - |
| Shore Stop #236 Canterbury | Salisbury, DE | 600 | 7 | - |
| Southwood Acres Pump District | Dover, DE | 591 | 3 | - |
| Bridgeville Mall (Tui) | Dover, DE | 550 | 2 | - |
| Dunkin - North Dover | Dover, DE | 550 | 0 | - |
| Tall Pines Resort Community Sys1 | Lewes, DE | 538 | 60 | - |
| Deer Meadows | Newark, DE | 534 | 2 | - |
| Bayshore Mobile Home Park | Ocean View, DE | 533 | 42 | - |
| Burger King - Seaford | Rehoboth, DE | 525 | 5 | - |
| Henlopen Acres, Town Of | Rehoboth, DE | 522 | 18 | - |
| Meding and Sons | Milford, DE | 515 | 17 | - |
| Dover Skating Center | Christiana, DE | 500 | 20 | - |
| Fox Pointe Subdivision | Smyrna, DE | 500 | 15 | - |
| Felton-Goose Creek Food Stores | Salisbury, DE | 500 | 19 | - |
| Surf Bagel | Rehoboth, DE | 500 | 13 | - |
| Ingram Village (Awc) | Newark, DE | 498 | 0 | - |
| Barkers Landing | Magnolia, DE | 498 | 20 | - |
| Mobile Gardens I | Pittsford, DE | 476 | 4 | - |
| Canterbury Crossing Pump District | Dover, DE | 471 | 4 | - |
| Kenton Pump District | Dover, DE | 465 | 0 | - |
| Lakeland/Beechwood Pump District | Dover, DE | 459 | 7 | - |
| Boondocks Restaurant | Smyrna, DE | 450 | 30 | - |
| Sussex County Industrial Airpark | Frankford, DE | 450 | 11 | - |
| Steamboat Landing System 1 | Milton, DE | 448 | 0 | - |
| Farmington Mini Mart | Farmington, DE | 433 | 50 | - |
| Hunter Mill Estates Pump District | Dover, DE | 432 | 18 | - |
| Baltimore Aircoil | Milford, DE | 430 | 14 | - |
| Country Grove | Dover, DE | 426 | 0 | - |
| Magnolia Water Department | Magnolia, DE | 425 | 10 | - |
| Pepper Creek District (Tui) | Dover, DE | 414 | 0 | - |
| Delaware Beaches Jellystone Park | Lincoln, DE | 412 | 27 | - |
| Treasure Beach Campground System 3 | West Fenwick Island, DE | 411 | 0 | - |
| Holly Lake Campsites System 1 | Millsboro, DE | 405 | 24 | - |
| South Shores (Tui) | Dover, DE | 402 | 16 | - |
| Epworth Christian School | Laurel, DE | 400 | 22 | - |
| Eagles Nest Fellowship Church | Milton, DE | 400 | 11 | - |
| Silver View Farm | Rehoboth, DE | 398 | 3 | - |
| Sand Hill Acres | Laurel, DE | 384 | 22 | - |
| Kingsmill | Bear, DE | 381 | 0 | - |
| Hartly Elementary School | Dover, DE | 375 | 54 | - |
| Friendship Creek | Newark, DE | 366 | 0 | - |
| Brick Mill Early Childhood Center | Middletown, DE | 360 | 0 | - |
| St Andrews Apartments | Bear, DE | 360 | 0 | - |
| Cedar Landing | Newark, DE | 357 | 2 | - |
| Akridge Scout Reservation | Dover, DE | 354 | 0 | - |
| Greenwood Mennonite School | Greenwood, DE | 350 | 7 | - |
| Fenwick Center I | Fenwick, DE | 350 | 0 | - |
| Greater Ellendale Water District | Frankford, DE | 350 | 0 | - |