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
207
Health-Based Violation Records
160
Systems with Violations
48
Cities with Issues
18

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

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