Water quality in Riverhead, New York
Riverhead 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 |
|---|---|---|---|---|
| Peconic View Mobile Home Park Riverhead (t) |
40 | 0 | 0.8 mi | |
| Peconic River Mobile Home Park Riverhead (t) |
75 | 0 | 2.5 mi | |
| Calverton Hills Owners Association Brookhaven (t) |
897 | 2 | 3.5 mi | |
| Riverside Water District Southampton (v) |
2,050 | 0 | 5.6 mi | |
| Brookhaven National Laboratory Brookhaven (t) |
3,500 | 0 | 8.3 mi | |
| Hampton Bays Water District Southampton (t) |
12,500 | 0 | 10.8 mi | |
| Suffolk County Water Authority Babylon (t), Brookhaven (t), East Hampton (t) and 6 more |
1,100,000 | 0 | 12.1 mi | |
| Seaview Water Company Brookhaven (t) |
1,400 | 0 | 13.9 mi | |
| West Neck Water District Shelter Island (t) |
100 | 0 | 22.0 mi | |
| Shelter Island Heights Association Shelter Island (t) |
500 | 2 | 22.5 mi | |
| ST James Water District Smithtown (t) |
10,587 | 0 | 22.5 mi | |
| Greenport Water District Southold (t) |
2,050 | 1 | 22.9 mi | |
| Smithtown Water District Smithtown (t) |
19,635 | 0 | 26.4 mi | |
| Fishers Island Water Works Southold (t) |
380 | 1 | 26.7 mi | |
| Dering Harbor Water District Shelter Island (t) |
14 | 0 | 28.7 mi | |
| Maidstone Park Cottages East Hampton (v) |
34 | 2 | 29.3 mi | |
| Ocean Beach Water District Islip (t) |
4,500 | 0 | 29.6 mi | |
| Saltaire Water District Islip (t) |
2,000 | 0 | 30.9 mi | |
| Greenlawn Water District Huntington (t) |
42,000 | 3 | 32.9 mi | |
| Dix Hills Water District Huntington (t) |
34,522 | 1 | 33.7 mi | |
| Robert Moses State Park Babylon (t) |
11,600 | 0 | 35.3 mi | |
| Northport VA Hospital Huntington (t) |
3,088 | 1 | 35.9 mi | |
| Oak Beach Public Water Supply Babylon (t) |
66 | 1 | 35.9 mi | |
| South Huntington Water District Huntington (t) |
81,760 | 1 | 37.1 mi | |
| West Gilgo Beach Association Babylon (t) |
300 | 0 | 42.2 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 |
|---|---|---|---|---|
|
Coastal Pipeline Corp. Riverhead (t) |
30 | 0 | 0 | |
|
Hampton Hills Golf Club Southampton (t) |
150 | 0 | 0 | |
|
Rock Hill Country Club Brookhaven (t) |
150 | 0 | 0 | |
|
Long Island Game Farm Brookhaven (t) |
200 | 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 | |
|
BP Gas-Ridge Brookhaven (t) |
75 | 0 | 0 | |
|
East Moriches Primary Care |
500 | 0 | 0 | |
|
EV and EM Vineyard Riverhead (t) |
100 | 0 | 0 | |
|
Shelter Island Iga Market Shelter Island (t) |
100 | 0 | 0 | |
|
North Shore Office Building Brookhaven (t) |
50 | 0 | 0 | |
|
Great Gun Beach Brookhaven (t) |
100 | 1 | 0 | |
|
Rose Hill Vineyards |
30 | 0 | 0 | |
|
Oldcastle Infrastructure Brookhaven (t) |
40 | 0 | 0 | |
|
First Student-Middle Island(was Laidlaw) Brookhaven (t) |
125 | 0 | 0 | |
|
Sea Haven Resort Motel (fna Sun+sand) Southampton (v) |
50 | 0 | 0 | |
|
McCall Farm Winery Southold (t) |
40 | 0 | 0 | |
|
Shell Station Yaphank |
100 | 1 | 0 | |
|
555 Professional Bldg. Brookhaven (t) |
30 | 0 | 0 | |
|
LA Antigua Southold (t) |
150 | 0 | 0 | |
|
Exxon (fna Hess Mart Calverton) Brookhaven (t) |
100 | 0 | 0 | |
|
Silly Lilly Fishing Station Brookhaven (t) |
100 | 0 | 0 | |
|
Varneys Restaurant Brookhaven (t) |
48 | 0 | 0 | |
|
1983 Montauk Hwy Offices Coparts Brookhaven (t) |
190 | 0 | 0 | |
|
Pugliese Vineyards Southold (t) |
50 | 1 | 0 | |
|
Caribbean Spot Brookhaven (t) |
200 | 0 | 0 | |
|
Lenz Winery Southold (t) |
50 | 2 | 0 | |
|
BP Mart Peconic Southold (t) |
100 | 1 | 0 | |
|
Sandy Hollow Day Camp Southampton (t) |
120 | 0 | 0 | |
|
Valero Brookhaven (t) |
1,000 | 0 | 0 | |
|
Corey Creek Vineyards Southold (t) |
75 | 1 | 0 | |
|
Joes Kwik Mart Brookhaven (t) |
200 | 0 | 0 | |
|
South Harbor Park Southold (t) |
50 | 0 | 0 | |
|
Bellport Village Beach Brookhaven (t) |
50 | 0 | 0 | |
|
Oysterpond Elementary School Southold (t) |
106 | 1 | 0 | |
|
Jefferson Temple Church of God in Christ Southold (t) |
100 | 0 | 0 | |
|
YMCA Brookhaven Roe Brookhaven (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 | |
|
Island Boatyard & Marina Shelter Island (t) |
100 | 0 | 0 | |
|
Eccentric Bagel Shelter Island (t) |
50 | 0 | 0 | |
|
Wades Beach Shelter Island (t) |
75 | 0 | 0 | |
|
Bridge Street Water Shelter Island (t) |
75 | 0 | 0 | |
|
American Legion Post #281 Shelter Island (t) |
100 | 0 | 0 | |
|
Shelter Island Library |
258 | 0 | 0 | |
|
Shelter Island Town Hall Shelter Island (t) |
50 | 0 | 0 |
About this data
Water systems are matched to Suffolk County, nearest to Riverhead 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. Retrieved from ECHO on Oct 11, 2026.