State drinking water records
New York drinking water systems
2,249 community water systems serve New York and are listed below under 62 counties and on the pages of 1,132 cities and towns. Their own population figures add up to 18,550,901 people, a sum that counts people twice where one system sells water to another.
339 of them (15%) had at least one health-based violation in the last 10 years. 386 systems still have one unresolved.
1,571 rely mainly on groundwater and 673 on surface water, counting water bought from other systems.
2,170 systems filed a lead service line inventory listing 251,266 lead lines, 37,729 galvanized lines that must be replaced and 950,957 lines of unknown material.
502 systems are placed by mailing address or by the county their records name: EPA has no service area map for 464 of them, and 38 have one that does not line up with their own records.
- Community water systems
- 2,249
- People served, sum of each system's own figure
- 18,550,901
- Systems with a health-based violation, last 10 years
- 339
- Systems with one unresolved
- 386
- Lead service lines in inventories
- 251,266
Counties
62 countiesEach county counts the systems whose service area map reaches it. Systems placed only by a mailing address are listed on the county pages but not counted here.
| County | Systems | People served | With a health-based violation, 10 years | With one unresolved |
|---|---|---|---|---|
| Albany County | 30 | 299,787 | 9 | 7 |
| Allegany County | 21 | 26,983 | 4 | 6 |
| Bronx County | 1 | 8,271,000 | 1 | 0 |
| Broome County | 47 | 156,559 | 6 | 7 |
| Cattaraugus County | 44 | 47,574 | 8 | 2 |
| Cayuga County | 19 | 43,395 | 2 | 1 |
| Chautauqua County | 42 | 101,576 | 1 | 9 |
| Chemung County | 25 | 82,716 | 2 | 1 |
| Chenango County | 27 | 21,017 | 1 | 0 |
| Clinton County | 31 | 56,818 | 4 | 8 |
| Columbia County | 37 | 24,486 | 5 | 8 |
| Cortland County | 18 | 33,247 | 3 | 3 |
| Delaware County | 24 | 20,149 | 5 | 6 |
| Dutchess County | 112 | 185,636 | 19 | 20 |
| Erie County | 40 | 945,396 | 6 | 9 |
| Essex County | 33 | 39,641 | 7 | 9 |
| Franklin County | 13 | 28,330 | 1 | 2 |
| Fulton County | 18 | 32,488 | 4 | 4 |
| Genesee County | 10 | 43,522 | 1 | 1 |
| Greene County | 21 | 24,143 | 7 | 11 |
| Hamilton County | 7 | 4,728 | 2 | 0 |
| Herkimer County | 24 | 34,458 | 7 | 5 |
| Jefferson County | 42 | 108,495 | 12 | 2 |
| Kings County | 1 | 8,271,000 | 1 | 0 |
| Lewis County | 13 | 10,842 | 2 | 1 |
| Livingston County | 23 | 51,065 | 5 | 1 |
| Madison County | 23 | 28,168 | 4 | 2 |
| Monroe County | 7 | 1,020,404 | 3 | 4 |
| Montgomery County | 14 | 30,501 | 2 | 7 |
| Nassau County | 39 | 1,383,075 | 4 | 0 |
| New York County | 1 | 8,271,000 | 1 | 0 |
| Niagara County | 20 | 223,670 | 0 | 0 |
| Oneida County | 39 | 195,515 | 4 | 3 |
| Onondaga County | 21 | 608,304 | 7 | 2 |
| Ontario County | 26 | 82,831 | 1 | 11 |
| Orange County | 119 | 336,707 | 24 | 22 |
| Orleans County | 12 | 26,901 | 0 | 0 |
| Oswego County | 33 | 73,653 | 3 | 8 |
| Otsego County | 32 | 29,185 | 5 | 8 |
| Putnam County | 78 | 36,740 | 3 | 13 |
| Queens County | 1 | 8,271,000 | 1 | 0 |
| Rensselaer County | 33 | 111,609 | 11 | 9 |
| Richmond County | 1 | 8,271,000 | 1 | 0 |
| Rockland County | 15 | 302,309 | 2 | 2 |
| Saratoga County | 64 | 169,963 | 12 | 22 |
| Schenectady County | 11 | 143,374 | 2 | 1 |
| Schoharie County | 12 | 9,913 | 2 | 1 |
| Schuyler County | 8 | 6,164 | 2 | 3 |
| Seneca County | 13 | 25,078 | 2 | 1 |
| St. Lawrence County | 27 | 58,470 | 1 | 5 |
| Steuben County | 44 | 45,109 | 5 | 9 |
| Suffolk County | 22 | 1,352,130 | 3 | 2 |
| Sullivan County | 42 | 36,093 | 8 | 12 |
| Tioga County | 27 | 22,363 | 1 | 2 |
| Tompkins County | 30 | 89,436 | 6 | 7 |
| Ulster County | 86 | 91,503 | 7 | 14 |
| Warren County | 20 | 49,813 | 0 | 8 |
| Washington County | 18 | 31,705 | 3 | 4 |
| Wayne County | 17 | 85,111 | 2 | 6 |
| Westchester County | 75 | 952,048 | 19 | 5 |
| Wyoming County | 18 | 20,525 | 4 | 1 |
| Yates County | 11 | 15,912 | 2 | 5 |
Largest systems
| System | Main county | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| New York City System | Queens County and 4 other counties | 8,271,000 | Surface water | 1 | 0 | 120,931 |
| Suffolk County Water Authority | Suffolk County | 1,100,000 | Groundwater | 1 | 0 | 11 |
| McWa | Monroe County and 1 other county | 768,458 | Surface water | 1 | 1 | 107 |
| Ocwa | Onondaga County | 350,000 | Surface water | 0 | 0 | 400 |
| Ecwa Direct | Erie County | 313,380 | Surface water | 0 | 0 | 248 |
| Buffalo Water Authority | Erie County | 276,000 | Surface water | 0 | 0 | 34,208 |
| Veolia Water New York | Rockland County | 270,000 | Surface water | 0 | 0 | 487 |
| Liberty Utilities New York - Lynbrook | Nassau County | 220,000 | Groundwater | 3 | 0 | 4,078 |
| Yonkers City | Westchester County | 211,569 | Purchased surface water | 0 | 0 | 65 |
| Rochester City | Monroe County | 210,000 | Surface water | 1 | 1 | 14,648 |
| Syracuse City | Onondaga County | 192,000 | Surface water | 13 | 0 | 17,239 |
| Veolia Water New York, Inc. Rd-1 | Westchester County | 146,732 | Purchased surface water | 0 | 0 | 8,008 |
| Liberty Utilities New York - Merrick | Nassau County | 135,000 | Groundwater | 3 | 0 | 32 |
| Mvwa - Mohawk Valley Water Authority | Oneida County | 126,250 | Surface water | 2 | 0 | 6,445 |
| WA of Western Nassau | Nassau County | 120,000 | Groundwater | 0 | 0 | 4,459 |
Systems with unresolved health-based violations
386 systemsThe 100 with the most unresolved violations are listed. The county pages list the other 286.
| System | Main county | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Herkimer Village | Herkimer County | 7,606 | Surface water | 25 | 12 | 0 |
| Shady Acres Mobile Home Park | Otsego County | 140 | Groundwater | 0 | 9 | No inventory |
| Onondaga Nation WS | Onondaga County | 1,200 | Groundwater | 0 | 7 | 0 |
| Cooks Falls Water District | Delaware County | 150 | Groundwater | 0 | 7 | 0 |
| Sea Breeze WD | Monroe County | 7,800 | Purchased surface water | 0 | 6 | 0 |
| Windham Ridge | Greene County | 456 | Groundwater | 0 | 6 | 0 |
| Willow Hill Mobile Court | Tompkins County | 40 | Groundwater | 1 | 5 | No inventory |
| Brockport Village | Monroe County | 25,918 | Purchased surface water | 0 | 4 | 0 |
| Deerpark Manor | Sullivan County and 1 other county | 500 | Groundwater | 1 | 4 | 0 |
| Yeshiva Farm Settlement | Westchester County | 300 | Groundwater under direct influence | 0 | 4 | 0 |
| Goldens Bridge Community Assoc | Westchester County | 250 | Groundwater | 0 | 4 | 1 |
| Chaffee Water Co | Erie County | 200 | Groundwater | 1 | 4 | No inventory |
| King Tract | Orange County | 150 | Groundwater | 0 | 4 | 0 |
| Mountain View Estates | Greene County | 108 | Groundwater | 0 | 4 | 0 |
| Pattersonville Mobile Home #1 | Montgomery County | 81 | Groundwater under direct influence | 0 | 4 | No inventory |
| Chamberlains Park | Steuben County | 68 | Groundwater | 0 | 4 | 0 |
| Knoxville Park | Albany County | 60 | Groundwater | 0 | 4 | 0 |
| Pattersonville Mobile Home #2 | Montgomery County | 50 | Groundwater | 0 | 4 | No inventory |
| Brunswick Consolidated Water District | Rensselaer County | 7,050 | Purchased surface water | 3 | 3 | 10 |
| Parkwood Village Apartments | Saratoga County | 400 | Groundwater | 0 | 3 | 0 |
| Castle High Trailer Park | Orange County | 325 | Groundwater | 0 | 3 | 0 |
| Hidden Forest Homes Inc | Steuben County | 220 | Groundwater | 0 | 3 | 0 |
| Ashland Water District | Greene County | 200 | Groundwater | 0 | 3 | 0 |
| Brunswick WD# 16 | Rensselaer County | 200 | Purchased surface water | 0 | 3 | 0 |
| Quads at Windham | Greene County | 166 | Groundwater | 6 | 3 | 0 |
| Newfield Estates | Tompkins County | 160 | Groundwater | 1 | 3 | No inventory |
| Whispering Pines MHP | Broome County | 100 | Groundwater | 2 | 3 | No inventory |
| Mill Creek Estates MHP | Otsego County | 100 | Groundwater | 0 | 3 | 0 |
| Camerons Trailer Park | Saratoga County | 98 | Groundwater | 0 | 3 | 0 |
| Hudson Valley Water Co #5 | Ulster County | 75 | Groundwater | 0 | 3 | 0 |
| Lees Mobile Home Park | Broome County | 60 | Groundwater | 2 | 3 | No inventory |
| Cottekill Village | Ulster County | 55 | Groundwater | 0 | 3 | 0 |
| Creekside Homes | Allegany County | 54 | Groundwater | 0 | 3 | 0 |
| Willow Brook MHP | Chautauqua County | 40 | Groundwater | 0 | 3 | No inventory |
| Mountain View Manor | Tompkins County | 40 | Groundwater | 1 | 3 | No inventory |
| Butler Estates | Steuben County | 38 | Groundwater | 0 | 3 | 0 |
| Mapletree Apts | Albany County | 30 | Groundwater | 2 | 3 | No inventory |
| Corrado Apartments (New and II) | Clinton County | 30 | Groundwater | 1 | 3 | No inventory |
| Big Sky II | Orange County | 25 | Groundwater | 0 | 3 | 0 |
| Dunkirk City | Chautauqua County | 12,743 | Surface water | 1 | 2 | No inventory |
| Suffern Village | Rockland County | 12,000 | Groundwater | 0 | 2 | 0 |
| Washingtonville Village | Orange County | 7,700 | Groundwater | 0 | 2 | 5 |
| East Aurora Village | Erie County | 6,610 | Purchased surface water | 0 | 2 | 0 |
| Liberty Village | Sullivan County | 3,900 | Surface water | 1 | 2 | 0 |
| Cold Spring Village | Putnam County | 2,666 | Surface water | 1 | 2 | No inventory |
| Rouses Point Village WD | Clinton County | 2,550 | Surface water | 1 | 2 | No inventory |
| Lake George Village | Warren County | 1,800 | Surface water | 0 | 2 | 0 |
| Elbridge Village | Onondaga County | 1,519 | Purchased surface water | 12 | 2 | 0 |
| Hector Water District | Schuyler County | 1,340 | Groundwater under direct influence | 0 | 2 | 0 |
| Naples Consolidated | Ontario County | 1,250 | Groundwater under direct influence | 0 | 2 | 0 |
| Greenbriar Subdivision | Westchester County | 956 | Groundwater | 0 | 2 | 0 |
| Hillburn Village | Rockland County | 950 | Purchased surface water | 1 | 2 | No inventory |
| Kiamesha Artesian Spring Water Company | Sullivan County | 879 | Groundwater | 0 | 2 | 0 |
| Mayfield (V) Water Works | Fulton County | 850 | Groundwater | 0 | 2 | 0 |
| Tannersville Village | Greene County | 629 | Surface water | 0 | 2 | 0 |
| O.C. Correctional Facility | Orange County | 565 | Purchased surface water | 0 | 2 | 0 |
| Windham Mountain Village | Greene County | 545 | Groundwater | 0 | 2 | 0 |
| Hopewell Services Inc | Dutchess County | 500 | Groundwater | 0 | 2 | 0 |
| Stannards Water, Inc. | Allegany County | 499 | Groundwater | 0 | 2 | 0 |
| Whitesville Water District | Allegany County | 475 | Groundwater | 0 | 2 | 0 |
| Town of Brant | Erie County | 465 | Purchased surface water | 0 | 2 | 0 |
| Stonegate Mobile Home Park | Greene County | 424 | Groundwater | 0 | 2 | 0 |
| Sagamor Water Corporation | Dutchess County | 400 | Groundwater | 0 | 2 | 0 |
| Grandview Water Works | Columbia County | 325 | Groundwater | 1 | 2 | No inventory |
| Carmel WD 12 | Putnam County | 300 | Groundwater | 0 | 2 | 0 |
| Hudson Valley Resort & Spa | Ulster County | 265 | Groundwater under direct influence | 0 | 2 | 0 |
| Crystal Pond Water Works | Greene County | 250 | Groundwater | 0 | 2 | 0 |
| Mountainview MHP | Tioga County | 250 | Groundwater | 1 | 2 | No inventory |
| Brunswick Water District #11 | Rensselaer County | 249 | Purchased surface water | 0 | 2 | 0 |
| Petersburgh Water District | Rensselaer County | 240 | Groundwater | 0 | 2 | 1 |
| Mount Community | Ulster County | 240 | Groundwater | 0 | 2 | 0 |
| Cornwall Meadows Townhomes W.S. | Putnam County | 230 | Groundwater | 1 | 2 | No inventory |
| Westerlo Town Water Supply | Albany County | 220 | Groundwater | 1 | 2 | No inventory |
| Lakewood Estates | Orange County | 210 | Groundwater | 0 | 2 | No inventory |
| Claverack Water District | Columbia County | 200 | Purchased groundwater | 1 | 2 | No inventory |
| Devon Farms | Dutchess County | 200 | Groundwater | 0 | 2 | 0 |
| Whistle Tree Development Corp. | Greene County | 200 | Groundwater | 0 | 2 | 0 |
| New Paltz Center for Rehab and Nursing | Ulster County | 179 | Groundwater | 0 | 2 | 0 |
| Blue Ridge Park | Broome County | 175 | Groundwater | 1 | 2 | No inventory |
| East Branch Valley Water District | Delaware County | 160 | Groundwater | 2 | 2 | 0 |
| Fishs Eddy Community Water Sup | Delaware County | 150 | Groundwater | 0 | 2 | 0 |
| Pinewood Knolls Water District | Dutchess County | 150 | Groundwater | 0 | 2 | 0 |
| Red Community LLC | Otsego County | 150 | Groundwater | 0 | 2 | 0 |
| Church Creek Mobile Home Community | St. Lawrence County | 150 | Groundwater | 0 | 2 | 0 |
| Saratoga Greens MHP | Saratoga County | 130 | Groundwater | 0 | 2 | 0 |
| Country Colony Estates | Ontario County | 125 | Groundwater | 0 | 2 | 0 |
| Mountain View Mobile Home Park - Fenton | Broome County | 122 | Groundwater | 1 | 2 | No inventory |
| Plaza at Clover Lake | Putnam County | 120 | Groundwater | 1 | 2 | No inventory |
| Livingston Nursing Home | Columbia County | 114 | Groundwater | 1 | 2 | No inventory |
| Pawling WD #1 | Dutchess County | 100 | Purchased groundwater | 1 | 2 | No inventory |
| Spring Creek Apartments | Dutchess County | 100 | Groundwater | 0 | 2 | 0 |
| Kiskatom Mobile Home Park | Greene County | 100 | Groundwater | 0 | 2 | 0 |
| Big Tree Mobile Home Park | Erie County | 99 | Groundwater | 1 | 2 | 0 |
| Prospect St. Water District | Cattaraugus County | 95 | Purchased surface water | 1 | 2 | No inventory |
| Champion Mobile Home Park | St. Lawrence County | 82 | Groundwater | 0 | 2 | 0 |
| Cameron Valley Estates | Steuben County | 78 | Groundwater | 0 | 2 | 0 |
| Glenwood Townhouses | Greene County | 76 | Groundwater | 0 | 2 | 0 |
| Gallis Hill MHP/Black Bear Hollow | Ulster County | 76 | Groundwater | 1 | 2 | No inventory |
| Shady Maple Trailer Park | Broome County | 72 | Groundwater | 1 | 2 | No inventory |
| Van Hornesville Water District | Herkimer County | 72 | Groundwater | 2 | 2 | 0 |
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations