Delaware Water Quality
According to EPA Safe Drinking Water Information System (SDWIS), Delaware has 207 active community water systems in this extract. PlainEnviro's health-based slice lists 160 violation records across 48 systems with at least one such row. These are historical EPA registry counts, not a statewide drinkability score.
Health-based violation records for 207 community water systems in Delaware. Source: EPA Safe Drinking Water Information System (SDWIS).
Water Systems with Most Health-Based Records
| # | Water System | Health-Based Records | Health |
|---|---|---|---|
| 1 | FOREST PARK Millsboro | 36 | Yes |
| 2 | CHERRY CREEK VALLEY Rehoboth Beach | 13 | Yes |
| 3 | EVERGREEN POST ACUTE Smyrna | 12 | Yes |
| 4 | HOME TOWN VILLAGE OF COOL BRANCH Seaford | 9 | Yes |
| 5 | MILLSBORO WATER DEPARTMENT Millsboro | 6 | Yes |
| 6 | BETHANY CREST LLC Clarksville | 6 | Yes |
| 7 | ARTESIAN SOUTHERN SUSSEX REGIONAL | 6 | Yes |
| 8 | SELBYVILLE WATER DEPARTMENT | 5 | Yes |
| 9 | ARTESIAN WATER COMPANY | 4 | Yes |
| 10 | REHOBOTH PUMP DISTRICT (TUI) | 4 | Yes |
| 11 | TALL PINES RESORT COMMUNITY SYS1 Lewes | 4 | Yes |
| 12 | WHISPERING PINES MOBILE HOME PARK New Castle | 4 | Yes |
| 13 | FISH HOOK MOBILE HOME PARK Georgetown | 3 | Yes |
| 14 | LAUREL WATER DEPARTMENT Laurel | 3 | Yes |
| 15 | BROADKILN BEACH WATER COMPANY (TUI) | 2 | Yes |
| 16 | BAYSHORE MOBILE HOME PARK Ocean View | 2 | Yes |
| 17 | CEDAR VILLAGE LLC Rehoboth Beach | 2 | Yes |
| 18 | CAREY ESTATES, LLC Rehoboth Beach | 2 | Yes |
| 19 | GREENWOOD WATER DEPARTMENT Greenwood | 2 | Yes |
| 20 | DOVER WATER DEPARTMENT Dover | 2 | Yes |
| 21 | LEWES BOARD OF PUBLIC WORKS Lewes | 2 | Yes |
| 22 | AVALON WOODS OWNERS ASSOC INC Georgetown | 2 | Yes |
| 23 | COUNTY SEAT GARDENS Georgetown | 2 | Yes |
| 24 | CHURCH CREEK (AWC) | 2 | Yes |
| 25 | COUNTRY CLUB VILLAGE (TUI) | 2 | Yes |
| 26 | BRIDGEVILLE MALL (TUI) | 1 | Yes |
| 27 | SEAFORD WATER DEPARTMENT Seaford | 1 | Yes |
| 28 | COUNTRY REST HOME Greenwood | 1 | Yes |
| 29 | OAK GROVE ESTATES Dover | 1 | Yes |
| 30 | WOODS EDGE MOBILE HOME PARK Kenton | 1 | Yes |
| 31 | VILLAGE OF GRANDVIEW Dover | 1 | Yes |
| 32 | GEORGETOWN WATER DEPARTMENT Georgetown | 1 | Yes |
| 33 | TWIN MAPLES TRAILER PARK Kenton | 1 | Yes |
| 34 | MILFORD WATER DEPARTMENT Milford | 1 | Yes |
| 35 | NEWARK WATER DEPARTMENT Newark | 1 | Yes |
| 36 | REHOBOTH BAY COMMUNITY Rehoboth Beach | 1 | Yes |
| 37 | WILMINGTON WATER DEPARTMENT Wilmington | 1 | Yes |
| 38 | BLADES, TOWN OF Blades | 1 | Yes |
| 39 | ANGOLA CREST II Lewes | 1 | Yes |
| 40 | PONDS OF ODESSA (AWC) | 1 | Yes |
| 41 | LONG NECK VILLAGE Millsboro | 1 | Yes |
| 42 | WOODLANDS OF MILLSBORO PUMP DISTRICT | 1 | Yes |
| 43 | BARKERS LANDING Magnolia | 1 | Yes |
| 44 | LAUREL PUMP DISTRICT | 1 | Yes |
| 45 | SUNLAKE TERRACE WATER SYSTEMS Wilmington | 1 | Yes |
| 46 | ELKTON WEST Newark | 1 | Yes |
| 47 | PORT DEPOSIT Newark | 1 | Yes |
| 48 | HARBOR VIEW Newark | 1 | Yes |
Most Common Contaminants in Delaware
| Contaminant | Violations | Systems Affected |
|---|---|---|
| Nitrate | 74 | 10 |
| pH | 23 | 12 |
| Combined Radium (-226 and -228) | 14 | 3 |
| Revised Total Coliform Rule | 11 | 8 |
| Manganese | 9 | 5 |
| TTHM | 7 | 2 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 6 | 6 |
| Lead and Copper Rule | 5 | 2 |
| Iron | 4 | 3 |
| Chloride | 2 | 1 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
| Fluoride | 1 | 1 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 1 | 1 |
| Interim Enhanced Surface Water Treatment Rule | 1 | 1 |
Cities with Water Quality Issues
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About This Data
Water quality data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Only community water systems (CWS) in Delaware are included.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.