1526 water systems in New York have at least one health-based violation on record. The system with the most health-based violations is Old Lewisboro Elementary School in Katonah with 162 health-based violations. Health-based violations mean a system exceeded an EPA maximum contaminant level or failed required treatment standards.
| Water System | City | Population | Health Violations | Total Violations |
|---|
| Old Lewisboro Elementary School |
Katonah | 50 |
162 | 167 |
| Tupper Lake V |
Tupper Lake | 5,500 |
123 | 127 |
| Pine Island Water Co. |
Warwick | 144 |
100 | 109 |
| Central Bridge Water District |
Central Bridge | 560 |
86 | 90 |
| Florida Village |
Florida | 2,884 |
85 | 89 |
| Woodlands at Cairo Apts |
Kingston | 90 |
79 | 246 |
| Yeshiva Farm Settlement |
Mt. Kisco | 300 |
79 | 90 |
| Blooming Grove Wd #4-Tappan Ho |
Blooming Grove | 550 |
70 | 120 |
| Delanson Village Water Works |
Delanson | 380 |
64 | 86 |
| Hensonville (Windham W.D.) |
Hensonville | 490 |
60 | 67 |
| Arluck Water District |
Slate Hill | 118 |
55 | 214 |
| Wrights Court |
Somers | 30 |
53 | 53 |
| Parkwood Village Apartments |
Albany | 400 |
52 | 90 |
| Barnwell Building |
Pound Ridge | 25 |
51 | 83 |
| O.C. Ahrc - Campbell Hall |
Monticello | 295 |
51 | 74 |
| Meadow Pond Elementary School |
Katonah | 405 |
51 | 58 |
| Valley View Ctr for Nursing Care & Rehab |
Goshen | 850 |
51 | 53 |
| Fultonville Village Pws |
Fultonville | 740 |
50 | 308 |
| Sunset Ridge Water District |
North Salem | 625 |
49 | 58 |
| Pasarella Pizzeria Inc |
North Syracuse | 25 |
49 | 55 |
| Yeshiva Kehileth Yakov |
Brooklyn | 150 |
48 | 49 |
| Orange County Airport |
Montgomery | 25 |
46 | 68 |
| Legoland New York |
Goshen | 16,000 |
45 | 47 |
| Mountain View Mobile Estates - Kingsbury |
Gansevoort | 150 |
44 | 116 |
| Whitlock Farms |
Newburgh | 100 |
44 | 50 |
| Chautauqua Water District #2 |
Mayville | 490 |
43 | 314 |
| Catskill Village |
Catskill | 8,000 |
43 | 158 |
| Wallkill Consolidated Wd |
Middletown | 18,450 |
42 | 271 |
| Ludingtonville Apts |
Carmel | 64 |
41 | 41 |
| West Carthage Village |
West Carthage | 1,734 |
39 | 39 |
| Bristol Wd #1 |
Canandaigua | 203 |
38 | 45 |
| Somers Town House/Hall |
Somers | 32 |
38 | 41 |
| Val-E-Vue Court |
Belfast | 40 |
37 | 86 |
| Monroe Wd #10 (Pine Tree Rd) |
Monroe | 50 |
37 | 59 |
| Bethlehem Wd No 1 |
Delmar | 31,000 |
37 | 43 |
| Rensselaerville Wd |
Medusa | 200 |
37 | 40 |
| West Patent Elementary School |
Armonk | 400 |
37 | 39 |
| Wilna T Wd 1 |
Carthage | 240 |
37 | 38 |
| Carthage Village |
Carthage | 3,600 |
37 | 37 |
| Arc of Dutchess |
Poughkeepsie | 58 |
35 | 115 |
| Towne Center |
Westmoreland | 200 |
34 | 35 |
| Mittal Petroleum |
Salt Point | 25 |
33 | 160 |
| Hometown Deli |
Middletown | 35 |
33 | 57 |
| Camp Gan Israel |
Airmont | 275 |
32 | 149 |
| Pabst Water District |
North Salem | 253 |
32 | 62 |
| The Farms Water District |
Bedford Hills | 300 |
32 | 38 |
| Harvey School |
Katonah | 510 |
31 | 64 |
| Okemo Village Condominiums |
New City | 180 |
31 | 52 |
| Walton Lake Estates W.D. |
Chester | 768 |
31 | 40 |
| Swiss Re of America |
Armonk | 800 |
31 | 35 |
| London Bridge Water Works |
West Nyack | 224 |
31 | 32 |
| Road House Tavern |
Pleasant Valley | 50 |
30 | 64 |
| Checkers Out Speedway |
Tribes Hill | 42 |
30 | 46 |
| Hill Sparrow Master Hoa |
Somers | 938 |
30 | 35 |
| Lowville Village |
Lowville | 4,000 |
30 | 32 |
| White Sail Condominium W.S. |
Mahopac | 85 |
30 | 31 |
| Nyseg Ops & Trans, Brewster |
Binghamton | 80 |
30 | 30 |
| John Jay Middle School |
Katonah | 945 |
29 | 70 |
| Sleepy Hollow Lake Water Co. |
Athens | 2,000 |
29 | 34 |
| Hounsfield Wd 2 |
Watertown | 725 |
29 | 32 |
| Putnam County Highway and Facilities |
Carmel | 25 |
29 | 29 |
| Patterson Town Hall (New) |
Patterson | 25 |
29 | 29 |
| Oakridge Water District |
Lagrangeville | 892 |
28 | 117 |
| Camp Seneca Lake |
Great Neck | 500 |
28 | 94 |
| Cameron Valley Estates |
North Chili | 78 |
28 | 88 |
| Rolling Acres MHP |
Great Neck | 100 |
28 | 37 |
| Cornwall Meadows Townhomes W.S. |
Carmel | 230 |
28 | 29 |
| Trinity Corners Shopping Cent. |
Pound Ridge | 100 |
28 | 29 |
| Essex Wd |
Essex | 350 |
27 | 41 |
| Yeshiva Washington Ave |
Spring Valley | 1,000 |
27 | 30 |
| Venetos Pizza |
Hopewell Junction | 26 |
26 | 64 |
| Monroe Wd #01 (High Ridge) |
Monroe | 308 |
26 | 41 |
| Nyack Village Water Supply |
Nyack | 14,700 |
26 | 36 |
| 1 Byram Brook Pl. |
Pleasantville | 50 |
26 | 29 |
| Independent Water Company |
Brewster | 50 |
26 | 26 |
| Big Tree Mobile Home Park |
West Seneca | 99 |
25 | 341 |
| Goldens Bridge Community Assoc |
Golden's Bridge | 250 |
25 | 315 |
| Fonda (V) Water Works |
Fonda | 1,080 |
25 | 54 |
| Pamelia Town Wd 4 & 5 |
Watertown | 1,000 |
25 | 46 |
| Newburgh City |
Newburgh | 29,000 |
25 | 36 |
| Veolia Water New York |
West Nyack | 270,000 |
25 | 34 |
| Town of Southeast Offices |
Brewster | 35 |
25 | 25 |
| Orchard Ridge Building 1 |
Brewster | 25 |
25 | 25 |
| Herkimer Village |
Herkimer | 7,606 |
24 | 142 |
| Pequenakonck Elementary School |
North Salem | 700 |
24 | 101 |
| Pine Bush Water District |
Pine Bush | 7,600 |
24 | 100 |
| Nys Thruway - Plattekill/Modena Area |
Newburgh | 999 |
24 | 46 |
| Muscoot Restaurant |
New Paltz | 120 |
24 | 28 |
| 2 Byram Brook Pl. |
Eastchester | 50 |
24 | 27 |
| Blue Mt Lake Wd |
Indian Lake | 400 |
24 | 25 |
| Kent Town Center |
Kent Lakes | 30 |
24 | 25 |
| Putnam County Transit Facility |
Carmel | 40 |
24 | 24 |
| North Salem Ms/Hs |
North Salem | 720 |
23 | 101 |
| Staatsburg Water System |
Poughkeepsie | 1,164 |
23 | 60 |
| Mountain View Meadows MHP |
Vestal | 125 |
23 | 26 |
| Kent Primary School |
Patterson | 100 |
23 | 25 |
| John F Kennedy High School |
Yonkers | 840 |
23 | 23 |
| Forest Park Homes |
West Nyack | 200 |
23 | 23 |
| Anderson Instrument Company |
Fultonville | 70 |
22 | 306 |
| Pine Grove Mobile Home Park |
Fishkill | 340 |
22 | 168 |