Water quality in Oyster Bay, New York
Oyster Bay is in Nassau County. 44 active public water systems serve the county; 8 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 Nassau County
39 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Hicksville WD Oyster Bay (t) |
48,000 | 0 | 2.8 mi | |
| Plainview WD Oyster Bay (t) |
34,000 | 0 | 2.8 mi | |
| Bethpage WD Oyster Bay (t) |
33,000 | 0 | 3.9 mi | |
| Westbury WD North Hempstead (t), Westbury (v) |
20,500 | 0 | 4.3 mi | |
| Oyster Bay WD Oyster Bay (t) |
8,700 | 0 | 4.6 mi | |
| Old Westbury (v) Old Westbury (v) |
4,700 | 1 | 4.7 mi | |
| Glenwood WD Oyster Bay (t) |
1,000 | 0 | 4.9 mi | |
| Farmingdale (v) Farmingdale (v) |
8,744 | 0 | 5.6 mi | |
| Town of Hempstead Water Department Hempstead (t) |
110,000 | 0 | 5.9 mi | |
| Liberty Utilities New York Mill Neck Mill Neck (v), Oyster Bay (t) |
280 | 0 | 6.0 mi | |
| Carle Place WD North Hempstead (t) |
9,005 | 0 | 6.2 mi | |
| South Farmingdale WD Oyster Bay (t) |
44,700 | 0 | 6.6 mi | |
| Roslyn WD Roslyn (v) |
17,000 | 0 | 6.9 mi | |
| Liberty Utilities New York Sea Cliff Sea Cliff (v) |
13,400 | 0 | 6.9 mi | |
| Locust Valley WD Mill Neck (v), Oyster Bay (t) |
7,500 | 0 | 7.0 mi | |
| East Williston (v) East Williston (v) |
2,556 | 0 | 7.0 mi | |
| Albertson WD North Hempstead (t) |
13,500 | 1 | 7.4 mi | |
| Mineola (v) Mineola (v) |
20,600 | 0 | 7.7 mi | |
| Williston Park (v) Williston Park (v) |
7,287 | 0 | 7.7 mi | |
| Glen Cove City Glen Cove (c) |
28,000 | 0 | 8.0 mi | |
| Bayville (v) Bayville (v) |
6,700 | 1 | 8.0 mi | |
| Garden City (v) Garden City (v) |
23,272 | 0 | 8.5 mi | |
| Liberty Utilities New York Merrick Hempstead (t) |
135,000 | 1 | 8.6 mi | |
| Cathedral Gardens WD Hempstead (t) |
1,500 | 0 | 8.7 mi | |
| Hempstead (v) Hempstead (v) |
56,000 | 1 | 8.7 mi |
Non-community systems in Nassau County (4: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Beaver Dam Winter Sports Matinecock (v), Oyster Bay (t) |
35 | 0 | 0 | |
|
Seawanhaka Yacht Club Centre Island (v), Oyster Bay (t) |
60 | 0 | 0 | |
|
Tobay Beach Oyster Bay (t) |
2,410 | 0 | 0 | |
|
Jones Beach State Park Hempstead (t) |
30,799 | 0 | 0 |
About this data
Water systems are matched to Nassau County, nearest to Oyster Bay 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.