Water quality for ZIP code 11733
ZIP 11733 covers East Setauket, Setauket, Old Field, Port Jefferson Station, Poquott, and Stony Brook 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 | 4.3 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 7.4 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 13.6 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 13.7 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 15.6 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 15.6 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 15.9 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 16.5 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 18.2 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 20.1 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 20.4 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 20.4 mi | |
| Riverhead Water District Riverhead (t) |
35,000 | 1 | 20.6 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 21.1 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 22.9 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 23.4 mi | |
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 23.9 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 27.7 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 31.1 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 40.8 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 40.9 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 41.4 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 44.5 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 48.2 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 49.3 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 |
|---|---|---|---|---|
|
Kings Park Launch Ramp Smithtown (t) |
100 | 0 | 0 | |
|
555 Professional Bldg. Brookhaven (t) |
30 | 0 | 0 | |
|
D. S. Shanahans Smithtown (t) |
150 | 0 | 0 | |
|
Caribbean Spot Brookhaven (t) |
200 | 0 | 0 | |
|
First Student-Middle Island(was Laidlaw) Brookhaven (t) |
125 | 0 | 0 | |
|
Joes Kwik Mart Brookhaven (t) |
200 | 0 | 0 | |
|
Oldcastle Infrastructure Brookhaven (t) |
40 | 0 | 0 | |
|
North Shore Office Building Brookhaven (t) |
50 | 0 | 0 | |
|
YMCA Brookhaven Roe Brookhaven (t) |
100 | 0 | 0 | |
|
Shell Station Yaphank |
100 | 1 | 0 | |
|
BP Gas-Ridge Brookhaven (t) |
75 | 0 | 0 | |
|
Valero Brookhaven (t) |
1,000 | 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 | |
|
Bellport Village Beach Brookhaven (t) |
50 | 0 | 0 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 0 | 0 | |
|
Cedar Beach Sportfishing Educ. Center Babylon (t) |
200 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 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 | |
|
Captree State Park Babylon (t) |
4,100 | 0 | 0 | |
|
Hampton Hills Golf Club Southampton (t) |
150 | 0 | 0 | |
|
Overlook Beach Babylon (t) |
450 | 0 | 0 | |
|
Cedar Beach (golf Course/concession) Babylon (t) |
500 | 0 | 0 | |
|
Gilgo Beach 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 | |
|
McCall Farm Winery Southold (t) |
40 | 0 | 0 | |
|
LA Antigua Southold (t) |
150 | 0 | 0 | |
|
Sea Haven Resort Motel (fna Sun+sand) Southampton (v) |
50 | 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 | |
|
Oysterpond Elementary School Southold (t) |
106 | 1 | 0 | |
|
Jefferson Temple Church of God in Christ Southold (t) |
100 | 0 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 0 | |
|
Pridwin Hotel Shelter Island (t) |
100 | 0 | 0 | |
|
Mill Creek Marina Southampton (t) |
100 | 0 | 0 | |
|
Atlantic Golf Club Southampton (t) |
100 | 0 | 0 | |
|
Kingdom Hall of Jehovah Witnesses |
500 | 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.