Water quality for ZIP code 11741
ZIP 11741 covers Holbrook, Holtsville, Ronkonkoma, Bohemia, and Lake Ronkonkoma 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 | 7.5 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 8.6 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 9.6 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 11.2 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 11.7 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 11.9 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 14.4 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 14.7 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 14.9 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 15.1 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 16.2 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 18.1 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 18.4 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 20.6 mi | |
| Riverhead Water District Riverhead (t) |
35,000 | 1 | 21.0 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 22.1 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 22.2 mi | |
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 22.9 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 29.1 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 42.2 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 42.7 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 42.9 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 46.7 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 48.8 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 |
|---|---|---|---|---|
|
YMCA Brookhaven Roe Brookhaven (t) |
100 | 0 | 0 | |
|
Joes Kwik Mart Brookhaven (t) |
200 | 0 | 0 | |
|
Valero Brookhaven (t) |
1,000 | 0 | 0 | |
|
Caribbean Spot Brookhaven (t) |
200 | 0 | 0 | |
|
1983 Montauk Hwy Offices Coparts Brookhaven (t) |
190 | 0 | 0 | |
|
Shell Station Yaphank |
100 | 1 | 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 | |
|
Bellport Village Beach Brookhaven (t) |
50 | 0 | 0 | |
|
Oldcastle Infrastructure Brookhaven (t) |
40 | 0 | 0 | |
|
First Student-Middle Island(was Laidlaw) Brookhaven (t) |
125 | 0 | 0 | |
|
555 Professional Bldg. Brookhaven (t) |
30 | 0 | 0 | |
|
Kings Park Launch Ramp Smithtown (t) |
100 | 0 | 0 | |
|
D. S. Shanahans Smithtown (t) |
150 | 0 | 0 | |
|
BP Gas-Ridge Brookhaven (t) |
75 | 0 | 0 | |
|
North Shore Office Building Brookhaven (t) |
50 | 0 | 0 | |
|
Captree State Park Babylon (t) |
4,100 | 0 | 0 | |
|
Great Gun Beach Brookhaven (t) |
100 | 1 | 0 | |
|
Cedar Beach Sportfishing Educ. Center Babylon (t) |
200 | 0 | 0 | |
|
Long Island Game Farm Brookhaven (t) |
200 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 0 | 0 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
94 Montauk Highway |
25 | 0 | 0 | |
|
78 Montauk Highway LLC (previouslypiffe) |
100 | 0 | 0 | |
|
Ighl, East Moriches Brookhaven (t) |
50 | 0 | 0 | |
|
Eastport Animal Hospital Brookhaven (t) |
50 | 0 | 0 | |
|
Overlook Beach Babylon (t) |
450 | 0 | 0 | |
|
Cedar Beach (golf Course/concession) Babylon (t) |
500 | 0 | 0 | |
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 0 | 0 | |
|
Hampton Hills Golf Club Southampton (t) |
150 | 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 | |
|
Sea Haven Resort Motel (fna Sun+sand) Southampton (v) |
50 | 0 | 0 | |
|
Rose Hill Vineyards |
30 | 0 | 0 | |
|
McCall Farm Winery Southold (t) |
40 | 0 | 0 | |
|
LA Antigua Southold (t) |
150 | 0 | 0 | |
|
Pugliese Vineyards Southold (t) |
50 | 1 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 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 | |
|
Kingdom Hall of Jehovah Witnesses |
500 | 0 | 0 | |
|
Atlantic Golf Club Southampton (t) |
100 | 0 | 0 | |
|
Mill Creek Marina Southampton (t) |
100 | 0 | 0 | |
|
Pridwin Hotel Shelter Island (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.