Water quality in Port Washington, New York
Port Washington 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 |
|---|---|---|---|---|
| Plandome (v) Plandome (v) |
1,600 | 0 | 1.8 mi | |
| Sands Point (v) North Hempstead (t), Sands Point (v) |
2,900 | 0 | 2.7 mi | |
| Liberty Utilities New York Sea Cliff Sea Cliff (v) |
13,400 | 0 | 2.8 mi | |
| Roslyn WD Roslyn (v) |
17,000 | 0 | 2.9 mi | |
| Manhasset Lakeville WD North Hempstead (t) |
43,000 | 0 | 3.4 mi | |
| Glen Cove City Glen Cove (c) |
28,000 | 0 | 4.0 mi | |
| Albertson WD North Hempstead (t) |
13,500 | 1 | 4.1 mi | |
| Williston Park (v) Williston Park (v) |
7,287 | 0 | 5.1 mi | |
| Old Westbury (v) Old Westbury (v) |
4,700 | 1 | 5.1 mi | |
| Garden City Park WD New Hyde Park (v) |
18,000 | 0 | 5.2 mi | |
| East Williston (v) East Williston (v) |
2,556 | 0 | 5.2 mi | |
| Mineola (v) Mineola (v) |
20,600 | 0 | 6.0 mi | |
| Locust Valley WD Mill Neck (v), Oyster Bay (t) |
7,500 | 0 | 6.2 mi | |
| Carle Place WD North Hempstead (t) |
9,005 | 0 | 6.4 mi | |
| Westbury WD North Hempstead (t), Westbury (v) |
20,500 | 0 | 7.2 mi | |
| Garden City (v) Garden City (v) |
23,272 | 0 | 7.3 mi | |
| Jericho WD Oyster Bay (t) |
58,000 | 1 | 7.7 mi | |
| WA of Western Nassau Hempstead (t), North Hempstead (t) |
120,000 | 0 | 8.3 mi | |
| Glenwood WD Oyster Bay (t) |
1,000 | 0 | 8.3 mi | |
| Franklin Square WD Hempstead (t), Stewart Manor (v) |
20,000 | 0 | 8.4 mi | |
| Bayville (v) Bayville (v) |
6,700 | 1 | 8.4 mi | |
| Oyster Bay WD Oyster Bay (t) |
8,700 | 0 | 8.7 mi | |
| West Hempstead WD Hempstead (t) |
32,031 | 1 | 8.7 mi | |
| Liberty Utilities New York Mill Neck Mill Neck (v), Oyster Bay (t) |
280 | 0 | 8.8 mi | |
| Cathedral Gardens WD Hempstead (t) |
1,500 | 0 | 9.1 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 | |
|
Jones Beach State Park Hempstead (t) |
30,799 | 0 | 0 | |
|
Tobay Beach Oyster Bay (t) |
2,410 | 0 | 0 |
About this data
Water systems are matched to Nassau County, nearest to Port Washington 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.