Water quality for ZIP code 11776
ZIP 11776 covers Terryville, Port Jefferson Station, Coram, Mount Sinai, Selden, and East Setauket 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 |
|---|---|---|---|---|
| ST James Water District Smithtown (t) |
10,587 | 0 | 5.8 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 9.6 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 9.9 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 11.9 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 12.7 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 16.2 mi | |
| Riverhead Water District Riverhead (t) |
35,000 | 1 | 17.3 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 17.5 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 17.6 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 19.0 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 19.3 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 19.3 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 19.5 mi | |
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 20.3 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 20.6 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 21.1 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 23.4 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 27.4 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 28.5 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 38.0 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 38.1 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 38.5 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 41.9 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 45.2 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 46.1 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 |
|---|---|---|---|---|
|
555 Professional Bldg. Brookhaven (t) |
30 | 0 | 0 | |
|
Caribbean Spot Brookhaven (t) |
200 | 0 | 0 | |
|
First Student-Middle Island(was Laidlaw) Brookhaven (t) |
125 | 0 | 0 | |
|
Oldcastle Infrastructure Brookhaven (t) |
40 | 0 | 0 | |
|
Joes Kwik Mart Brookhaven (t) |
200 | 0 | 0 | |
|
North Shore Office Building Brookhaven (t) |
50 | 0 | 0 | |
|
Shell Station Yaphank |
100 | 1 | 0 | |
|
BP Gas-Ridge Brookhaven (t) |
75 | 0 | 0 | |
|
YMCA Brookhaven Roe Brookhaven (t) |
100 | 0 | 0 | |
|
Valero Brookhaven (t) |
1,000 | 0 | 0 | |
|
Kings Park Launch Ramp Smithtown (t) |
100 | 0 | 0 | |
|
D. S. Shanahans Smithtown (t) |
150 | 0 | 0 | |
|
1983 Montauk Hwy Offices Coparts Brookhaven (t) |
190 | 0 | 0 | |
|
Varneys Restaurant Brookhaven (t) |
48 | 0 | 0 | |
|
Exxon (fna Hess Mart Calverton) Brookhaven (t) |
100 | 0 | 0 | |
|
Silly Lilly Fishing Station Brookhaven (t) |
100 | 0 | 0 | |
|
Long Island Game Farm Brookhaven (t) |
200 | 0 | 0 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
Bellport Village Beach Brookhaven (t) |
50 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 0 | 0 | |
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 0 | 0 | |
|
94 Montauk Highway |
25 | 0 | 0 | |
|
Eastport Animal Hospital Brookhaven (t) |
50 | 0 | 0 | |
|
78 Montauk Highway LLC (previouslypiffe) |
100 | 0 | 0 | |
|
Ighl, East Moriches Brookhaven (t) |
50 | 0 | 0 | |
|
Great Gun Beach Brookhaven (t) |
100 | 1 | 0 | |
|
Hampton Hills Golf Club Southampton (t) |
150 | 0 | 0 | |
|
Cedar Beach Sportfishing Educ. Center Babylon (t) |
200 | 0 | 0 | |
|
Captree State Park Babylon (t) |
4,100 | 0 | 0 | |
|
Overlook Beach Babylon (t) |
450 | 0 | 0 | |
|
Cedar Beach (golf Course/concession) Babylon (t) |
500 | 0 | 0 | |
|
EV and EM Vineyard Riverhead (t) |
100 | 0 | 0 | |
|
Shelter Island Iga Market Shelter Island (t) |
100 | 0 | 0 | |
|
Rose Hill Vineyards |
30 | 0 | 0 | |
|
Gilgo Beach Babylon (t) |
500 | 0 | 0 | |
|
McCall Farm Winery Southold (t) |
40 | 0 | 0 | |
|
Sea Haven Resort Motel (fna Sun+sand) Southampton (v) |
50 | 0 | 0 | |
|
LA Antigua Southold (t) |
150 | 0 | 0 | |
|
Pugliese Vineyards Southold (t) |
50 | 1 | 0 | |
|
Lenz Winery Southold (t) |
50 | 2 | 0 | |
|
BP Mart Peconic Southold (t) |
100 | 1 | 0 | |
|
Corey Creek Vineyards Southold (t) |
75 | 1 | 0 | |
|
South Harbor Park Southold (t) |
50 | 0 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 0 | |
|
Oysterpond Elementary School Southold (t) |
106 | 1 | 0 | |
|
Jefferson Temple Church of God in Christ Southold (t) |
100 | 0 | 0 | |
|
Pridwin Hotel Shelter Island (t) |
100 | 0 | 0 | |
|
Mill Creek Marina Southampton (t) |
100 | 0 | 0 | |
|
Kingdom Hall of Jehovah Witnesses |
500 | 0 | 0 | |
|
Atlantic Golf Club Southampton (t) |
100 | 0 | 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.