New York drinking water quality
New York has 8,076 active public water systems serving 19.3 million people. 3,681 of them, 46%, had at least one EPA violation in the past three years, 582 have an unresolved violation today, and 47 are designated serious violators by the EPA.
Active systems
8,076
in 62 counties
People served
19.3M
2,253 community systems serve 18.3M
Violations, past 3 years
3,681
46% of active systems
Serious violators
47
84 systems carry a health flag
Largest counties
All 62 countiesLargest community water systems
All 8,076 systems| System | Serves | Status |
|---|---|---|
| New York City System Bronx County |
8,271,000 | |
| Suffolk County Water Authority Suffolk County |
1,100,000 | |
| McWa Monroe County |
525,262 | |
| Ocwa Onondaga County |
350,000 | |
| Ecwa Direct Erie County |
313,380 | |
| Buffalo Water Authority Erie County |
276,000 | |
| Veolia Water New York Rockland County |
270,000 | |
| Liberty Utilities New York Lynbrook Nassau County |
220,000 | |
| Yonkers City Westchester County |
211,569 | |
| Rochester City Monroe County |
210,000 |
About the New York data
Retrieved from EPA ECHO on Oct 11, 2026.