State drinking water records
Delaware drinking water systems
207 community water systems serve Delaware and are listed below under 3 counties and on the pages of 72 cities and towns. Their own population figures add up to 1,022,142 people, a sum that counts people twice where one system sells water to another.
28 of them (14%) had at least one health-based violation in the last 10 years. 34 systems still have one unresolved.
202 rely mainly on groundwater and 5 on surface water, counting water bought from other systems.
195 systems filed a lead service line inventory listing 2,691 lead lines, 3,601 galvanized lines that must be replaced and 113,405 lines of unknown material.
40 systems are placed by the county their records name: EPA has no service area map for 39 of them, and 1 has one that does not line up with its own records.
- Community water systems
- 207
- People served, sum of each system's own figure
- 1,022,142
- Systems with a health-based violation, last 10 years
- 28
- Systems with one unresolved
- 34
- Lead service lines in inventories
- 2,691
Counties
3 countiesEach county counts the systems whose service area map reaches it. Systems placed only by a mailing address are listed on the county pages but not counted here.
| County | Systems | People served | With a health-based violation, 10 years | With one unresolved |
|---|---|---|---|---|
| Kent County | 52 | 147,322 | 5 | 12 |
| New Castle County | 15 | 520,888 | 1 | 0 |
| Sussex County | 101 | 352,416 | 20 | 18 |
Largest systems
| System | Main county | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Artesian Water Company | New Castle County | 231,114 | Purchased surface water | 0 | 0 | 148 |
| Wilmington Water Department | New Castle County | 107,976 | Surface water | 1 | 0 | 1,708 |
| Veolia Water Delaware, Inc | New Castle County | 100,495 | Surface water | 0 | 0 | 0 |
| Rehoboth Pump District (Tui) | Sussex County | 81,417 | Groundwater | 0 | 0 | 0 |
| Bethany Bay Pump District | Sussex County | 51,000 | Groundwater | 0 | 0 | 0 |
| Newark Water Department | New Castle County | 40,000 | Surface water | 0 | 0 | 0 |
| Dover Water Department | Kent County | 39,491 | Groundwater | 0 | 0 | 0 |
| Dewey Beach Water Department | Sussex County | 31,000 | Purchased groundwater | 0 | 0 | 0 |
| Rehoboth Beach Water Department | Sussex County | 25,000 | Groundwater | 0 | 0 | 0 |
| Artesian Southern Sussex Regional | Sussex County | 18,215 | Groundwater | 1 | 0 | 0 |
| Middletown Water Department | New Castle County | 17,700 | Purchased surface water | 0 | 0 | 0 |
| Camden Pump District | Kent County | 17,208 | Groundwater | 0 | 0 | 0 |
| Garrison Lake Pump District | Kent County | 17,148 | Groundwater | 0 | 0 | 0 |
| Sussex Shores Water Company | Sussex County | 12,450 | Groundwater | 0 | 0 | 2 |
| Bethany Beach Water Department | Sussex County | 12,000 | Groundwater | 0 | 0 | 0 |
Systems with unresolved health-based violations
34 systems| System | Main county | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Frederica Water Department | Kent County | 950 | Groundwater | 0 | 2 | 0 |
| Cape Windsor Community Association Inc | Sussex County | 600 | Groundwater | 0 | 2 | 0 |
| Kitts Hummock Improvement Assoc | Kent County | 305 | Groundwater | 0 | 2 | 0 |
| Pine Ridge Mobile Home Park | Sussex County | 222 | Groundwater | 0 | 2 | 0 |
| Meadows at Cubbage Pond | Sussex County | 201 | Groundwater | 0 | 2 | 0 |
| Todds Mobile Court | Sussex County | 189 | Groundwater | 0 | 2 | 0 |
| Lakeside Home LLC | Sussex County | 50 | Groundwater | 0 | 2 | 0 |
| Woodland Trailer Court | Kent County | 41 | Groundwater | 0 | 2 | 0 |
| Harrington Water Department | Kent County | 3,562 | Groundwater | 0 | 1 | 458 |
| Angola Beach Estates | Sussex County | 1,400 | Groundwater | 0 | 1 | 0 |
| Town of Blades | Sussex County | 1,200 | Groundwater | 0 | 1 | 0 |
| Laurel Village MHC | Sussex County | 918 | Groundwater | 0 | 1 | 0 |
| Tall Pines Resort Community SYS1 | Sussex County | 538 | Groundwater | 2 | 1 | 0 |
| Town of Henlopen Acres | Sussex County | 522 | Groundwater | 0 | 1 | 0 |
| Silver View Farm | Sussex County | 398 | Groundwater | 0 | 1 | 0 |
| Sand Hill Acres | Sussex County | 384 | Groundwater | 0 | 1 | 0 |
| Forest Grove Pump District | Kent County | 330 | Groundwater | 0 | 1 | 0 |
| Carey Estates, LLC | Sussex County | 312 | Groundwater | 2 | 1 | 0 |
| County Seat Gardens | Sussex County | 297 | Groundwater | 1 | 1 | 0 |
| Holly Oak Mobile Home Park | Sussex County | 210 | Groundwater | 0 | 1 | 0 |
| Sussex Manor Mobile Home Park | Sussex County | 195 | Groundwater | 1 | 1 | 0 |
| Woodlands of Millsboro Pump District | Sussex County | 171 | Groundwater | 0 | 1 | 0 |
| Colonial Estates Mobile Home Park | Sussex County | 165 | Groundwater | 0 | 1 | 0 |
| Oak Grove Estates | Kent County | 150 | Groundwater | 1 | 1 | 0 |
| Twin Maples Trailer Park | Kent County | 123 | Groundwater | 0 | 1 | 0 |
| Bethany Crest LLC | Sussex County | 115 | Groundwater | 2 | 1 | 0 |
| Serenity Manor Estates | Kent County | 110 | Groundwater | 0 | 1 | 0 |
| Stage Village MHC | Sussex County | 93 | Groundwater | 0 | 1 | 0 |
| Hartly Mobile Home Park | Kent County | 90 | Groundwater | 0 | 1 | 0 |
| J & J MHP | Kent County | 84 | Groundwater | 0 | 1 | 0 |
| Blanton's Manufactured Home Community | Kent County | 75 | Groundwater | 0 | 1 | 0 |
| Countryside Hamlet | Sussex County | 66 | Groundwater | 1 | 1 | 0 |
| Law Mobile Home Park | Kent County | 50 | Groundwater | 0 | 1 | 0 |
| Strimel's MHP LLC. | Kent County | 40 | Groundwater | 0 | 1 | 0 |
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations