Water quality for ZIP code 11947
ZIP 11947 covers Jamesport 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 | 5.4 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 5.7 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 6.1 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 7.7 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 13.5 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 14.2 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 14.6 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 15.5 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 16.4 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 19.2 mi | |
| Suffolk County Water Authority Babylon (t), Brookhaven (t), East Hampton (t) and 6 more |
1,100,000 | 0 | 20.2 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 20.6 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 21.2 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 21.3 mi | |
| ST James Water District Smithtown (t) |
10,587 | 0 | 30.6 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 34.5 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 37.2 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 38.6 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 41.0 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 41.8 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 43.3 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 43.6 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 43.9 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 45.2 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 50.1 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 |
|---|---|---|---|---|
|
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 | |
|
Hampton Hills Golf Club Southampton (t) |
150 | 0 | 0 | |
|
Pugliese Vineyards Southold (t) |
50 | 1 | 0 | |
|
Lenz Winery Southold (t) |
50 | 2 | 0 | |
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 0 | 0 | |
|
BP Mart Peconic Southold (t) |
100 | 1 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 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 | |
|
Mill Creek Marina Southampton (t) |
100 | 0 | 0 | |
|
Atlantic Golf Club Southampton (t) |
100 | 0 | 0 | |
|
Kingdom Hall of Jehovah Witnesses |
500 | 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 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
Pridwin Hotel Shelter Island (t) |
100 | 0 | 0 | |
|
Long Island Game Farm Brookhaven (t) |
200 | 0 | 0 | |
|
Island Boatyard & Marina Shelter Island (t) |
100 | 0 | 0 | |
|
Wades Beach Shelter Island (t) |
75 | 0 | 0 | |
|
Eccentric Bagel Shelter Island (t) |
50 | 0 | 0 | |
|
American Legion Post #281 Shelter Island (t) |
100 | 0 | 0 | |
|
Shelter Island Library |
258 | 0 | 0 | |
|
Shelter Island School Shelter Island (t) |
315 | 1 | 0 | |
|
Shelter Island Town Hall Shelter Island (t) |
50 | 0 | 0 | |
|
Shelter Island Nutrition Program Shelter Island (t) |
75 | 0 | 0 | |
|
Bridge Street Water Shelter Island (t) |
75 | 0 | 0 | |
|
Marias Kitchen Shelter Island (t) |
25 | 0 | 0 | |
|
Kyles (previously Cafe 27) Shelter Island (t) |
150 | 0 | 0 | |
|
All Seasons Catering Shelter Island (t) |
50 | 0 | 0 | |
|
Opties and Dinghies Shelter Island (t) |
50 | 0 | 0 | |
|
Cards Cottages Shelter Island (t) |
60 | 0 | 0 | |
|
Dering Harbor Corp Shelter Island (t) |
250 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 0 | 0 | |
|
Shelter Island Senior Citizens Center Shelter Island (t) |
35 | 0 | 0 | |
|
Sylvester Manor |
100 | 0 | 0 | |
|
Vine Street Cafe Shelter Island (t) |
80 | 0 | 0 | |
|
Ellis Country Market Shelter Island (t) |
50 | 0 | 0 | |
|
Mashomack Pres. Visitor Ctr. Shelter Island (t) |
50 | 0 | 0 | |
|
Wolffer Estate Vineyard Southampton (t) |
50 | 0 | 0 | |
|
Coecles Harbor Marina Shelter Island (t) |
150 | 0 | 0 | |
|
Old Stove Pub Southampton (t) |
150 | 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.