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 |
| Long Neck Village | Millsboro, DE | 345 | 44 | - |
| Shawns Hideaway System #1 | Millsboro, DE | 341 | 0 | - |
| Ascot Landing Subdivision | Bear, DE | 338 | 0 | - |
| The Vines of Sandhill (Awc) | Newark, DE | 336 | 0 | - |
| Forest Grove Pump District | Dover, DE | 330 | 31 | - |
| Pine Tree Campsites | Ocean View, DE | 325 | 4 | - |
| New Market Village | Laurel, DE | 321 | 34 | - |
| Carey Estates, LLC | Rehoboth Beach, DE | 312 | 21 | - |
| Avalon Woods Owners Assoc Inc | Georgetown, DE | 306 | 25 | - |
| Kitts Hummock Improvement Assoc | Dover, DE | 305 | 39 | - |
| Indian River Acres Pump District | Dover, DE | 300 | 1 | - |
| Laurel Oasis Restaurant | Warsaw, DE | 300 | 0 | - |
| Port Delmarva Inc | Milford, DE | 300 | 0 | - |
| Big Oak Family Camping | Rehoboth Beach, DE | 300 | 0 | - |
| Scottsdale Mobile Home Park | Pittsford, DE | 300 | 14 | - |
| Homestead Camping | Dover, DE | 300 | 3 | - |
| Trap Pond State Park System 4-Cypress Pt | Laurel, DE | 300 | 0 | - |
| 301 Plaza | Middletown, DE | 300 | 3 | - |
| County Seat Gardens | Georgetown, DE | 297 | 76 | - |
| Briarwood Manor MHP | Pittsford, DE | 296 | 168 | - |
| Sycamore Chase (Awc) | Newark, DE | 291 | 0 | - |
| St Andrews Apartment New Addition | Bear, DE | 272 | 0 | - |
| Point Farm | Dover, DE | 270 | 0 | - |
| Hunters Pointe Pump District | Dover, DE | 261 | 1 | - |
| Evergreen Post Acute | Smyrna, DE | 256 | 51 | - |
| Country Living Mobile Court | Millsboro, DE | 255 | 6 | - |
| Voshells Cove Pump District | Dover, DE | 252 | 5 | - |
| Dover Air Park | Dover, DE | 252 | 36 | - |
| Summit Village Shopping Center | Middletown, DE | 250 | 0 | - |
| Helens Sausage House | Newark, DE | 250 | 0 | - |
| Vic Mead Hunt Club | Wilmington, DE | 250 | 19 | - |
| Smith Landing System 1 | Milton, DE | 250 | 19 | - |
| Cooper Farm Pump District | Dover, DE | 249 | 3 | - |
| Deep Branch Family Campground | Milton, DE | 246 | 8 | - |
| Sandy Ridge Pump District | Dover, DE | 243 | 3 | - |
| Glasgow Pines II | Bear, DE | 235 | 0 | - |
| Homestead Park | Pittsford, DE | 230 | 27 | - |
| Delaware State Fire School | Dover, DE | 228 | 68 | - |
| Enchanted Acres Mhc LLC | Crofton, DE | 225 | 20 | - |
| Allen Harim - Pinnacle Processing Plant | Millsboro, DE | 225 | 11 | - |
| Pine Ridge Mobile Home Park | Seaford, DE | 222 | 134 | - |
| Rookery South | Milford, DE | 222 | 6 | - |
| Meridian Crossing Apartments | Bear, DE | 220 | 0 | - |
| Hanover Foods Corporation | Clayton, DE | 217 | 9 | - |
| Ponds of Odessa (Awc) | Newark, DE | 216 | 2 | - |
| Bayview Improvement Company (Awc) | Newark, DE | 214 | 7 | - |
| Green Acres Pump District | Dover, DE | 213 | 1 | - |
| Sambos Tavern | Smyrna, DE | 212 | 14 | - |
| Holly Oak Mobile Home Park | Delmar, DE | 210 | 31 | - |
| Love Creek Mhc | Laurel, DE | 210 | 16 | - |