Water quality for ZIP code 11958
ZIP 11958 covers Peconic and Southold 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 |
|---|---|---|---|---|
| West Neck Water District Shelter Island (t) |
100 | 0 | 6.5 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 6.9 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 7.3 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 11.0 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 11.7 mi | |
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 13.6 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 13.7 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 14.1 mi | |
| Riverhead Water District Riverhead (t) |
35,000 | 1 | 14.8 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 15.2 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 15.4 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 21.3 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 24.0 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 29.4 mi | |
| ST James Water District Smithtown (t) |
10,587 | 0 | 37.3 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 41.2 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 45.2 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 46.6 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 47.7 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 48.9 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 50.4 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 51.0 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 51.6 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 52.1 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 58.0 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 |
|---|---|---|---|---|
|
Lenz Winery Southold (t) |
50 | 2 | 0 | |
|
BP Mart Peconic Southold (t) |
100 | 1 | 0 | |
|
Pugliese Vineyards Southold (t) |
50 | 1 | 0 | |
|
Corey Creek Vineyards Southold (t) |
75 | 1 | 0 | |
|
South Harbor Park Southold (t) |
50 | 0 | 0 | |
|
LA Antigua Southold (t) |
150 | 0 | 0 | |
|
Oysterpond Elementary School Southold (t) |
106 | 1 | 0 | |
|
Jefferson Temple Church of God in Christ Southold (t) |
100 | 0 | 0 | |
|
McCall Farm Winery Southold (t) |
40 | 0 | 0 | |
|
Rose Hill Vineyards |
30 | 0 | 0 | |
|
Pridwin Hotel Shelter Island (t) |
100 | 0 | 0 | |
|
Shelter Island Iga Market Shelter Island (t) |
100 | 0 | 0 | |
|
Eccentric Bagel Shelter Island (t) |
50 | 0 | 0 | |
|
Island Boatyard & Marina Shelter Island (t) |
100 | 0 | 0 | |
|
Bridge Street Water Shelter Island (t) |
75 | 0 | 0 | |
|
EV and EM Vineyard Riverhead (t) |
100 | 0 | 0 | |
|
Wades Beach Shelter Island (t) |
75 | 0 | 0 | |
|
Mill Creek Marina Southampton (t) |
100 | 0 | 0 | |
|
Shelter Island Library |
258 | 0 | 0 | |
|
American Legion Post #281 Shelter Island (t) |
100 | 0 | 0 | |
|
Dering Harbor Corp Shelter Island (t) |
250 | 0 | 0 | |
|
Shelter Island Town Hall Shelter Island (t) |
50 | 0 | 0 | |
|
Marias Kitchen Shelter Island (t) |
25 | 0 | 0 | |
|
Opties and Dinghies Shelter Island (t) |
50 | 0 | 0 | |
|
Shelter Island School Shelter Island (t) |
315 | 1 | 0 | |
|
Shelter Island Nutrition Program Shelter Island (t) |
75 | 0 | 0 | |
|
Kyles (previously Cafe 27) Shelter Island (t) |
150 | 0 | 0 | |
|
Cards Cottages Shelter Island (t) |
60 | 0 | 0 | |
|
All Seasons Catering Shelter Island (t) |
50 | 0 | 0 | |
|
Sylvester Manor |
100 | 0 | 0 | |
|
Shelter Island Senior Citizens Center Shelter Island (t) |
35 | 0 | 0 | |
|
Ellis Country Market Shelter Island (t) |
50 | 0 | 0 | |
|
Vine Street Cafe Shelter Island (t) |
80 | 0 | 0 | |
|
Mashomack Pres. Visitor Ctr. Shelter Island (t) |
50 | 0 | 0 | |
|
Coecles Harbor Marina Shelter Island (t) |
150 | 0 | 0 | |
|
Gardiners Bay Country Club Shelter Island (t) |
100 | 0 | 0 | |
|
Whales Tale Shelter Island (t) |
150 | 0 | 0 | |
|
Perlman Music School Shelter Island (t) |
80 | 0 | 0 | |
|
Islander(pat & Steves Family Restaurant Shelter Island (t) |
75 | 0 | 0 | |
|
Shelter Island Slice Shelter Island (t) |
60 | 1 | 0 | |
|
Commander Cody Seafood Shelter Island (t) |
50 | 0 | 0 | |
|
Atlantic Golf Club Southampton (t) |
100 | 0 | 0 | |
|
Rams Head Inn Shelter Island (t) |
50 | 0 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 0 | |
|
Kingdom Hall of Jehovah Witnesses |
500 | 0 | 0 | |
|
Sea Haven Resort Motel (fna Sun+sand) Southampton (v) |
50 | 0 | 0 | |
|
Orient Yacht Club Southold (t) |
50 | 0 | 0 | |
|
Sag Harbor State Golf Course Southampton (t) |
200 | 0 | 0 | |
|
Moonflower Southold (t) |
50 | 1 | 0 | |
|
Orient Country Store Southold (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.