Water quality in Holtsville, New York
Holtsville is in Suffolk 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 | 7.6 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 10.1 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 10.2 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 12.9 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 13.0 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 13.5 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 15.7 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 15.9 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 16.9 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 18.0 mi | |
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 18.9 mi | |
| Riverhead Water District Riverhead (t) |
35,000 | 1 | 19.3 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 19.4 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 19.4 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 20.4 mi | |
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 21.3 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 24.0 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 27.6 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 40.5 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 40.9 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 41.1 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 44.9 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 47.1 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 47.6 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 | |
|
Shell Station Yaphank |
100 | 1 | 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 | |
|
Oldcastle Infrastructure Brookhaven (t) |
40 | 0 | 0 | |
|
First Student-Middle Island(was Laidlaw) Brookhaven (t) |
125 | 0 | 0 | |
|
Bellport Village Beach Brookhaven (t) |
50 | 0 | 0 | |
|
555 Professional Bldg. Brookhaven (t) |
30 | 0 | 0 | |
|
BP Gas-Ridge Brookhaven (t) |
75 | 0 | 0 | |
|
Kings Park Launch Ramp Smithtown (t) |
100 | 0 | 0 | |
|
D. S. Shanahans Smithtown (t) |
150 | 0 | 0 | |
|
North Shore Office Building Brookhaven (t) |
50 | 0 | 0 | |
|
Long Island Game Farm Brookhaven (t) |
200 | 0 | 0 | |
|
Great Gun Beach Brookhaven (t) |
100 | 1 | 0 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 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 | |
|
Captree State Park Babylon (t) |
4,100 | 0 | 0 | |
|
Cedar Beach Sportfishing Educ. Center Babylon (t) |
200 | 0 | 0 | |
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 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 | |
|
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, nearest to Holtsville 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.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.