Water quality in Seaford, New York
Seaford 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 |
|---|---|---|---|---|
| Massapequa WD Massapequa Park (v), Oyster Bay (t) |
43,000 | 0 | 1.7 mi | |
| South Farmingdale WD Oyster Bay (t) |
44,700 | 0 | 3.5 mi | |
| Freeport (v) Freeport (v) |
45,000 | 0 | 4.9 mi | |
| Town of Hempstead Water Department Hempstead (t) |
110,000 | 0 | 5.2 mi | |
| Farmingdale (v) Farmingdale (v) |
8,744 | 0 | 5.2 mi | |
| Bethpage WD Oyster Bay (t) |
33,000 | 0 | 5.5 mi | |
| Hicksville WD Oyster Bay (t) |
48,000 | 0 | 6.8 mi | |
| Cathedral Gardens WD Hempstead (t) |
1,500 | 0 | 7.1 mi | |
| Hempstead (v) Hempstead (v) |
56,000 | 1 | 7.1 mi | |
| Plainview WD Oyster Bay (t) |
34,000 | 0 | 7.6 mi | |
| Rockville Centre (v) Rockville Center (v) |
24,700 | 0 | 7.6 mi | |
| Westbury WD North Hempstead (t), Westbury (v) |
20,500 | 0 | 7.8 mi | |
| Lido-Point Lookout WD Hempstead (t) |
2,000 | 0 | 8.0 mi | |
| Carle Place WD North Hempstead (t) |
9,005 | 0 | 8.5 mi | |
| Garden City (v) Garden City (v) |
23,272 | 0 | 8.8 mi | |
| West Hempstead WD Hempstead (t) |
32,031 | 1 | 9.0 mi | |
| Mineola (v) Mineola (v) |
20,600 | 0 | 9.5 mi | |
| Liberty Utilities New York Lynbrook Hempstead (t), Lynbrook (v) |
220,000 | 1 | 9.6 mi | |
| East Williston (v) East Williston (v) |
2,556 | 0 | 9.9 mi | |
| Old Westbury (v) Old Westbury (v) |
4,700 | 1 | 10.0 mi | |
| Williston Park (v) Williston Park (v) |
7,287 | 0 | 10.3 mi | |
| Franklin Square WD Hempstead (t), Stewart Manor (v) |
20,000 | 0 | 10.3 mi | |
| Long Beach City Long Beach (c) |
35,000 | 0 | 10.5 mi | |
| Albertson WD North Hempstead (t) |
13,500 | 1 | 11.0 mi | |
| Jericho WD Oyster Bay (t) |
58,000 | 1 | 11.0 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 |
|---|---|---|---|---|
|
Jones Beach State Park Hempstead (t) |
30,799 | 0 | 0 | |
|
Tobay Beach Oyster Bay (t) |
2,410 | 0 | 0 | |
|
Beaver Dam Winter Sports Matinecock (v), Oyster Bay (t) |
35 | 0 | 0 | |
|
Seawanhaka Yacht Club Centre Island (v), Oyster Bay (t) |
60 | 0 | 0 |
About this data
Water systems are matched to Nassau County, nearest to Seaford 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.