Water quality for ZIP code 11978
ZIP 11978 covers Westhampton, Westhampton Beach, Quiogue, Quogue, and West Hampton Dunes in Suffolk County, New York, one of 108 ZIP codes in the county. 146 active public water systems serve the county; 25 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Suffolk County
25 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 5.6 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 6.0 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 6.8 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 7.4 mi | |
| Riverhead Water District Riverhead (t) |
35,000 | 1 | 8.7 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 9.0 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 11.8 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 14.0 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 22.9 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 23.3 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 24.7 mi | |
| ST James Water District Smithtown (t) |
10,587 | 0 | 26.5 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 28.1 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 28.3 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 28.3 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 29.3 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 30.1 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 31.1 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 36.2 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 36.4 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 36.5 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 36.6 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 39.7 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 40.1 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 42.9 mi |
Non-community systems in Suffolk County (120: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Hampton Hills Golf Club Southampton (t) |
150 | 0 | 0 | |
|
Eastport Animal Hospital Brookhaven (t) |
50 | 0 | 0 | |
|
Ighl, East Moriches Brookhaven (t) |
50 | 0 | 0 | |
|
78 Montauk Highway LLC (previouslypiffe) |
100 | 0 | 0 | |
|
94 Montauk Highway |
25 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 0 | 0 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
Long Island Game Farm Brookhaven (t) |
200 | 0 | 0 | |
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 0 | 0 | |
|
Great Gun Beach Brookhaven (t) |
100 | 1 | 0 | |
|
Sea Haven Resort Motel (fna Sun+sand) Southampton (v) |
50 | 0 | 0 | |
|
EV and EM Vineyard Riverhead (t) |
100 | 0 | 0 | |
|
Shelter Island Iga Market Shelter Island (t) |
100 | 0 | 0 | |
|
BP Gas-Ridge Brookhaven (t) |
75 | 0 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 0 | |
|
Exxon (fna Hess Mart Calverton) Brookhaven (t) |
100 | 0 | 0 | |
|
Silly Lilly Fishing Station Brookhaven (t) |
100 | 0 | 0 | |
|
Rose Hill Vineyards |
30 | 0 | 0 | |
|
McCall Farm Winery Southold (t) |
40 | 0 | 0 | |
|
Varneys Restaurant Brookhaven (t) |
48 | 0 | 0 | |
|
Shell Station Yaphank |
100 | 1 | 0 | |
|
1983 Montauk Hwy Offices Coparts Brookhaven (t) |
190 | 0 | 0 | |
|
LA Antigua Southold (t) |
150 | 0 | 0 | |
|
Oldcastle Infrastructure Brookhaven (t) |
40 | 0 | 0 | |
|
Bellport Village Beach Brookhaven (t) |
50 | 0 | 0 | |
|
Pugliese Vineyards Southold (t) |
50 | 1 | 0 | |
|
First Student-Middle Island(was Laidlaw) Brookhaven (t) |
125 | 0 | 0 | |
|
North Shore Office Building Brookhaven (t) |
50 | 0 | 0 | |
|
Lenz Winery Southold (t) |
50 | 2 | 0 | |
|
Valero Brookhaven (t) |
1,000 | 0 | 0 | |
|
BP Mart Peconic Southold (t) |
100 | 1 | 0 | |
|
Kingdom Hall of Jehovah Witnesses |
500 | 0 | 0 | |
|
South Harbor Park Southold (t) |
50 | 0 | 0 | |
|
Atlantic Golf Club Southampton (t) |
100 | 0 | 0 | |
|
Corey Creek Vineyards Southold (t) |
75 | 1 | 0 | |
|
Caribbean Spot Brookhaven (t) |
200 | 0 | 0 | |
|
555 Professional Bldg. Brookhaven (t) |
30 | 0 | 0 | |
|
Joes Kwik Mart Brookhaven (t) |
200 | 0 | 0 | |
|
Mill Creek Marina Southampton (t) |
100 | 0 | 0 | |
|
Oysterpond Elementary School Southold (t) |
106 | 1 | 0 | |
|
Jefferson Temple Church of God in Christ Southold (t) |
100 | 0 | 0 | |
|
YMCA Brookhaven Roe Brookhaven (t) |
100 | 0 | 0 | |
|
Wolffer Estate Vineyard Southampton (t) |
50 | 0 | 0 | |
|
Old Stove Pub Southampton (t) |
150 | 1 | 0 | |
|
Pridwin Hotel Shelter Island (t) |
100 | 0 | 0 | |
|
Townline Bbq East Hampton (t) |
150 | 0 | 0 | |
|
Island Boatyard & Marina Shelter Island (t) |
100 | 0 | 0 | |
|
Wades Beach Shelter Island (t) |
75 | 0 | 0 | |
|
LA Capannina Southampton (t) |
100 | 0 | 0 | |
|
Wolffer Estates Stables Southampton (t) |
45 | 1 | 0 |
About this data
Water systems are matched to Suffolk County, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New York records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.