1517 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 119 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 |
119 | 124 |
| Yeshiva Farm Settlement |
Mt. Kisco | 300 |
67 | 76 |
| Hensonville (Windham W.D.) |
Hensonville | 490 |
60 | 67 |
| Tupper Lake V |
Tupper Lake | 5,500 |
59 | 61 |
| Wrights Court |
Somers | 30 |
45 | 45 |
| Catskill Village |
Catskill | 8,000 |
42 | 155 |
| Fultonville Village Pws |
Fultonville | 740 |
42 | 143 |
| Central Bridge Water District |
Central Bridge | 560 |
41 | 43 |
| Meadow Pond Elementary School |
Katonah | 405 |
40 | 47 |
| Pine Island Water Co. |
Warwick | 144 |
39 | 45 |
| Florida Village |
Florida | 2,884 |
39 | 42 |
| Woodlands at Cairo Apts |
Kingston | 90 |
38 | 118 |
| Sunset Ridge Water District |
North Salem | 625 |
38 | 47 |
| Val-E-Vue Court |
Belfast | 40 |
37 | 57 |
| Parkwood Village Apartments |
Albany | 400 |
36 | 72 |
| Barnwell Building |
Pound Ridge | 25 |
36 | 53 |
| Yeshiva Kehileth Yakov |
Brooklyn | 150 |
35 | 36 |
| O.C. Ahrc - Campbell Hall |
Monticello | 295 |
34 | 47 |
| Somers Town House/Hall |
Somers | 32 |
34 | 37 |
| Blooming Grove Wd #4-Tappan Ho |
Blooming Grove | 550 |
31 | 62 |
| West Patent Elementary School |
Armonk | 400 |
31 | 33 |
| Okemo Village Condominiums |
New City | 180 |
30 | 50 |
| Chautauqua Water District #2 |
Mayville | 490 |
29 | 148 |
| Rolling Acres MHP |
Great Neck | 100 |
28 | 37 |
| Putnam County Highway and Facilities |
Carmel | 25 |
28 | 28 |
| Arluck Water District |
Slate Hill | 118 |
27 | 166 |
| Mountain View Mobile Estates - Kingsbury |
Gansevoort | 150 |
27 | 82 |
| Valley View Ctr for Nursing Care & Rehab |
Goshen | 850 |
27 | 29 |
| Oakridge Water District |
Lagrangeville | 892 |
26 | 85 |
| Pabst Water District |
North Salem | 253 |
26 | 56 |
| Lowville Village |
Lowville | 4,000 |
26 | 28 |
| Harvey School |
Katonah | 510 |
25 | 43 |
| Orange County Airport |
Montgomery | 25 |
25 | 38 |
| Walton Lake Estates W.D. |
Chester | 768 |
25 | 30 |
| Swiss Re of America |
Armonk | 800 |
25 | 29 |
| Sleepy Hollow Lake Water Co. |
Athens | 2,000 |
25 | 28 |
| Herkimer Village |
Herkimer | 7,606 |
24 | 141 |
| Wilna T Wd 1 |
Carthage | 240 |
24 | 25 |
| Trinity Corners Shopping Cent. |
Pound Ridge | 100 |
24 | 25 |
| Putnam County Transit Facility |
Carmel | 40 |
24 | 24 |
| Staatsburg Water System |
Poughkeepsie | 1,164 |
23 | 60 |
| Venetos Pizza |
Hopewell Junction | 26 |
23 | 56 |
| Whitlock Farms |
Newburgh | 100 |
23 | 29 |
| Pasarella Pizzeria Inc |
North Syracuse | 25 |
23 | 27 |
| Bethlehem Wd No 1 |
Delmar | 31,000 |
23 | 26 |
| Yeshiva Washington Ave |
Spring Valley | 1,000 |
23 | 26 |
| Kent Primary School |
Patterson | 100 |
23 | 25 |
| Kent Town Center |
Kent Lakes | 30 |
23 | 24 |
| Wallkill Consolidated Wd |
Middletown | 18,450 |
22 | 137 |
| Pequenakonck Elementary School |
North Salem | 700 |
22 | 61 |
| Pamelia Town Wd 4 & 5 |
Watertown | 1,000 |
22 | 43 |
| Essex Wd |
Essex | 350 |
22 | 36 |
| Delanson Village Water Works |
Delanson | 380 |
22 | 30 |
| Towne Center |
Westmoreland | 200 |
22 | 23 |
| Lowville (T) Wd #1 |
Lowville | 350 |
22 | 22 |
| John Jay Middle School |
Katonah | 945 |
21 | 62 |
| Hometown Deli |
Middletown | 35 |
21 | 37 |
| Bristol Wd #1 |
Canandaigua | 203 |
21 | 26 |
| The Farms Water District |
Bedford Hills | 300 |
21 | 25 |
| Patterson Town Hall (New) |
Patterson | 25 |
21 | 21 |
| Mittal Petroleum |
Salt Point | 25 |
20 | 88 |
| Road House Tavern |
Pleasant Valley | 50 |
20 | 37 |
| Legoland New York |
Goshen | 16,000 |
20 | 21 |
| Kent Elementary School |
Patterson | 100 |
20 | 21 |
| John F Kennedy High School |
Yonkers | 840 |
20 | 20 |
| Nyseg Ops & Trans, Brewster |
Binghamton | 80 |
20 | 20 |
| Cedar Meadows Water Corp |
Hopewell Junction | 250 |
19 | 40 |
| 2 Byram Brook Pl. |
Eastchester | 50 |
19 | 22 |
| North Castle Water District #2 |
Armonk | 1,200 |
19 | 21 |
| 1 Byram Brook Pl. |
Pleasantville | 50 |
19 | 21 |
| Pound Ridge Golf Club |
White Plains | 101 |
19 | 19 |
| Whitehall Village |
Whitehall | 2,800 |
18 | 105 |
| North Salem Ms/Hs |
North Salem | 720 |
18 | 58 |
| Summit Lake Ws |
Bear Mountain | 900 |
18 | 23 |
| Town of Southeast Offices |
Brewster | 35 |
18 | 18 |
| Big Tree Mobile Home Park |
West Seneca | 99 |
17 | 232 |
| Harriman Village |
Harriman | 5,000 |
17 | 26 |
| Winebrook Hills Wd |
Newcomb | 250 |
17 | 19 |
| West Carthage Village |
West Carthage | 1,734 |
17 | 17 |
| Orchard Ridge Building 1 |
Brewster | 25 |
17 | 17 |
| Cameron Valley Estates |
North Chili | 78 |
16 | 48 |
| Monroe Wd #10 (Pine Tree Rd) |
Monroe | 50 |
16 | 28 |
| Malta Ave Professional Office |
Cambridge | 50 |
16 | 24 |
| Hounsfield Wd 2 |
Watertown | 725 |
16 | 19 |
| Rensselaerville Wd |
Medusa | 200 |
16 | 19 |
| Watertown City |
Watertown | 27,861 |
16 | 16 |
| Carthage Village |
Carthage | 3,600 |
16 | 16 |
| Independent Water Company |
Brewster | 50 |
16 | 16 |
| Pine Grove Mobile Home Park |
Fishkill | 340 |
15 | 91 |
| Putnam Valley Elementary Sch |
Putnam Valley | 300 |
15 | 17 |
| Ludingtonville Apts |
Carmel | 64 |
15 | 15 |
| Goldens Bridge Community Assoc |
Golden's Bridge | 250 |
14 | 222 |
| Pottersville Water District |
Chestertown | 300 |
14 | 35 |
| O.C. Emergency Services Center |
Goshen | 35 |
14 | 22 |
| Phoenicia Water District |
Shandaken | 450 |
14 | 20 |
| Hill Sparrow Master Hoa |
Somers | 938 |
14 | 19 |
| Jordan Village |
Jordan | 1,400 |
14 | 16 |
| Dix Water District #1 |
Watkins Glen | 201 |
14 | 16 |
| Syracuse City |
Syracuse | 192,000 |
14 | 15 |
| Cornwall Meadows Townhomes W.S. |
Carmel | 230 |
14 | 15 |