New York
Westchester County drinking water quality
273 active public water systems serve 996,244 people in Westchester County. 180 are compliant, 93 had at least one EPA violation in the past three years, 1 is a designated serious violator, and 3 carry a health flag.
Active systems
273
92 community systems
People served
996K
by public water systems
Systems with violations
93
34% of active systems, past 3 years
Serious violators
1
3 systems carry a health flag
Needs attention
Barnwell Building
NY5917426 · Pound Ridge (t) · Non-Transient non-community system · Serves 25
4 rules violated in the past three years
Westchester Joint Water Works
NY5903435 · Community water system · Serves 59,629
1 rule violated in the past three years. Unresolved: Surface Water Treatment Rule.
Old Lewisboro Elementary School
NY5907702 · Lewisboro (t) · Non-Transient non-community system · Serves 50
1 rule violated in the past three years. Unresolved: Lead and Copper Rule.
Nys Dot Residency Katonah
NY5930017 · Bedford (t) · Transient non-community system · Serves 30
1 rule violated in the past three years. Unresolved: Long Term 2 Enhanced Surface Water Treatment Rule.
Community water systems
92 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Yonkers City Yonkers (c) |
211,569 | 0 | 0 | |
|
Veolia Water New York, Inc. Rd-1 Ardsley (v), Bronxville (v), Dobbs Ferry (v) and 6 more |
146,732 | 1 | 0 | |
|
Mount Vernon Water Department Mount Vernon (c) |
73,893 | 0 | 0 | |
|
Westchester Joint Water Works |
59,629 | 1 | 1 | |
|
White Plains City White Plains (c) |
59,559 | 0 | 0 | |
|
Veolia Water New York, Inc. Rd-2 Port Chester (v), Rye (t), Rye Brook (v) |
57,301 | 1 | 0 | |
|
Greenburgh Consolidated WD #1 Greenburgh (t) |
43,312 | 0 | 0 | |
|
Yorktown Consold. Water Dist.#1 Yorktown (t) |
36,000 | 1 | 0 | |
|
Ossining Water Department Ossining (t) |
30,000 | 0 | 0 | |
|
Cortlandt Consolidated WD Cortlandt (t) |
28,369 | 0 | 0 | |
|
Peekskill City Peekskill (c) |
24,272 | 0 | 0 | |
|
Scarsdale Water Department |
21,649 | 1 | 0 | |
|
Kensico Water District Mount Pleasant (t) |
17,917 | 0 | 0 | |
|
New Castle/stanwood W.d. New Castle (t) |
17,116 | 0 | 0 | |
|
Mount Kisco Water Department Mount Kisco (v) |
11,187 | 1 | 0 | |
|
Tarrytown Water Supply Tarrytown (v) |
11,000 | 1 | 0 | |
|
Sleepy Hollow (village) Mount Pleasant (t) |
9,870 | 0 | 0 | |
|
Pleasantville Water District Mount Pleasant (t) |
9,550 | 1 | 0 | |
|
Briarcliff Manor Village Briarcliff Manor (v) |
9,190 | 0 | 0 | |
|
Bedford Consolidated W.d. Bedford (t) |
9,056 | 0 | 0 | |
|
Croton on Hudson Village Croton-on-hudson (v) |
8,000 | 1 | 1 | |
|
Irvington Water Supply Irvington (v) |
6,631 | 0 | 0 | |
|
Larchmont Village Larchmont (v) |
6,485 | 0 | 0 | |
|
Westchester County WD #3 Greenburgh (t) |
6,000 | 1 | 0 | |
|
Elmsford Village Elmsford (v) |
5,293 | 0 | 0 | |
|
Heritage Hills Water System Somers (t) |
4,700 | 1 | 0 | |
|
Somers Consolidated Water District #1 Somers (t) |
3,848 | 0 | 0 | |
|
Montrose Improvement District Cortlandt (t) |
3,100 | 0 | 0 | |
|
Pace University Mount Pleasant (t) |
2,753 | 1 | 0 | |
|
North Castle Water District #1 North Castle (t) |
2,500 | 2 | 0 | |
|
Buchanan Village Buchanan (v) |
2,200 | 0 | 0 | |
|
Old Farm Hill Water District Mount Pleasant (t) |
1,768 | 0 | 0 | |
|
Old Post Road Water District Bedford (t) |
1,500 | 0 | 0 | |
|
North Castle Water District #4 North Castle (t) |
1,225 | 1 | 0 | |
|
North Castle Water District #2 North Castle (t) |
1,200 | 0 | 0 | |
|
Greenbriar Subdivision Somers (t) |
956 | 2 | 1 | |
|
Oakridge Water District Lewisboro (t) |
892 | 2 | 0 | |
|
Wild Oaks Water Company Lewisboro (t) |
805 | 0 | 0 | |
|
Khal Adas Kashau Bedford (t) |
650 | 0 | 0 | |
|
Meadows at Cross River Lewisboro (t) |
630 | 0 | 0 | |
|
Sunset Ridge Water District North Salem (t) |
625 | 0 | 0 | |
|
Bear Ridge Lake Water District Mount Pleasant (t) |
518 | 0 | 0 | |
|
Harvey School Bedford (t) |
510 | 3 | 0 | |
|
Lincoln Hall School Somers (t) |
500 | 2 | 0 | |
|
Dykeer Water Co. Somers (t) |
480 | 0 | 0 | |
|
Four Winds Hospital Bedford (t) |
400 | 0 | 0 | |
|
The Paramount at Somers Rehab Center Somers (t) |
400 | 1 | 0 | |
|
Truesdale Corporation Lewisboro (t) |
400 | 0 | 0 | |
|
Twin Lakes Water Co., Inc. Lewisboro (t) |
366 | 1 | 0 | |
|
Lake Katonah Club INC Bedford (t), Lewisboro (t) |
356 | 0 | 0 |
Non-community systems (181: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Fox Lane High & Middle Schools Mount Kisco (v) |
3,000 | 0 | 0 | |
|
John Jay Senior High School Lewisboro (t) |
1,425 | 2 | 0 | |
|
Somers High School Somers (t) |
1,189 | 0 | 0 | |
|
Bedford Rest Area Nys RT 684 Bedford (t) |
1,000 | 2 | 0 | |
|
Saint Joseph Church (new) Somers (t) |
1,000 | 0 | 0 | |
|
Byram Hills High School North Castle (t) |
973 | 0 | 0 | |
|
John Jay Middle School Lewisboro (t) |
945 | 1 | 0 | |
|
Primrose School Somers (t) |
900 | 1 | 0 | |
|
Seven-Eleven Store Somers (t) |
900 | 0 | 0 | |
|
John F Kennedy High School Somers (t) |
840 | 0 | 0 | |
|
Swiss RE of America |
800 | 1 | 0 | |
|
Somers Middle School Somers (t) |
790 | 0 | 0 | |
|
North Salem Ms/hs North Salem (t) |
720 | 0 | 0 | |
|
Lewisboro Town Park Lewisboro (t) |
700 | 1 | 0 | |
|
Pequenakonck Elementary School North Salem (t) |
700 | 0 | 0 | |
|
Mountain Lakes Camp North Salem (t) |
675 | 0 | 0 | |
|
Somers Intermediate School Somers (t) |
673 | 0 | 0 | |
|
Breezemont Day Camp North Castle (t) |
550 | 0 | 0 | |
|
Reis Park/somers Library Somers (t) |
500 | 0 | 0 | |
|
Froggys Deli Somers (t) |
450 | 0 | 0 | |
|
Increase Miller Elementary Sch Lewisboro (t) |
450 | 0 | 0 | |
|
Rippowam Cisqua School Bedford Bedford (t) |
425 | 1 | 0 | |
|
Meadow Pond Elementary School Lewisboro (t) |
405 | 0 | 0 | |
|
North Castle Pool &tennis Club North Castle (t) |
400 | 0 | 0 | |
|
Onatru Farm Lewisboro (t) |
400 | 0 | 0 | |
|
One P Way, LLC Somers (t) |
400 | 1 | 0 | |
|
West Patent Elementary School Bedford (t) |
400 | 0 | 0 | |
|
325 West Patent Road Mount Kisco (v) |
365 | 0 | 0 | |
|
Church of Jesus Christ Lds Ossining (t) |
300 | 0 | 0 | |
|
Inn at Pound Ridge Pound Ridge (t) |
300 | 0 | 0 | |
|
Pound Ridge Elementary School Pound Ridge (t) |
300 | 0 | 0 | |
|
Pound Ridge Town Park Pound Ridge (t) |
300 | 0 | 0 | |
|
Towne Centre at Somers Somers (t) |
275 | 0 | 0 | |
|
Bedford Community Church Bedford (t) |
250 | 0 | 0 | |
|
Cranberry Lake North Castle (t) |
250 | 1 | 0 | |
|
One Twenty Three Restaurant, LLC Lewisboro (t) |
250 | 0 | 0 | |
|
Vista Indoor Tennis Lewisboro (t) |
250 | 0 | 0 | |
|
Chestnut Ridge Racquet Club Bedford (t) |
220 | 1 | 0 | |
|
Armonk Alliance Church North Castle (t) |
208 | 0 | 0 | |
|
Anglebrook Golf Club Somers (t) |
200 | 1 | 0 | |
|
Annsville Mobil Cortlandt (t) |
200 | 1 | 0 | |
|
Armonk Tennis Club North Castle (t) |
200 | 0 | 0 | |
|
Burger Barn Somers (t) |
200 | 0 | 0 | |
|
Church of St. Patrick North Castle (t) |
200 | 0 | 0 | |
|
Salem Golf Club North Salem (t) |
185 | 0 | 0 | |
|
Northern Westchester 103-105 Bedford (t) |
160 | 0 | 0 | |
|
Table 9 Peekskill (c) |
160 | 0 | 0 | |
|
Waccabuc Country Club Beach and Camp Lewisboro (t) |
160 | 0 | 0 | |
|
Camp Smith Nys Cortlandt (t) |
150 | 0 | 0 | |
|
Fox Valley Park Lewisboro (t) |
150 | 0 | 0 | |
|
IL Forno Restaurant Somers (t) |
150 | 0 | 0 | |
|
Monteverde at Oldstone Cortlandt (t) |
150 | 0 | 0 | |
|
Muscoot Farm Somers (t) |
150 | 0 | 0 | |
|
Sapientia Association Inc. Lewisboro (t) |
150 | 0 | 0 | |
|
Travelers Restaurant Yorktown (t) |
150 | 1 | 0 | |
|
Westchester School for Special Children North Salem (t) |
150 | 0 | 0 | |
|
Bacio Restaurant Lewisboro (t) |
130 | 0 | 0 | |
|
Kingdom Hall of Jehovahs Wit Ossining (t) |
125 | 1 | 0 | |
|
Chabad of Bedford Bedford (t) |
120 | 1 | 0 | |
|
Farmer and the Fish North Salem (t) |
120 | 0 | 0 | |
|
Muscoot Restaurant Somers (t) |
120 | 0 | 0 | |
|
Young Judaea Sprout Westchester Cortlandt (t) |
120 | 1 | 0 | |
|
Rock Cut Mart Inc. |
110 | 3 | 0 | |
|
Albano Electric Pound Ridge (t) |
102 | 0 | 0 | |
|
73 Westchester , LLC Pound Ridge (t) |
101 | 1 | 0 | |
|
74 Westchester Pound Ridge (t) |
101 | 0 | 0 | |
|
890 Route 35 Lewisboro (t) |
101 | 0 | 0 | |
|
Bonne Building Pound Ridge (t) |
101 | 0 | 0 | |
|
Croton Falls Shell Station North Salem (t) |
101 | 1 | 0 | |
|
Glen Arbor Golf Club Bedford (t) |
101 | 0 | 0 | |
|
LA Bastide and Cenadou North Salem (t) |
101 | 0 | 0 | |
|
LE Fontane Restaurant Somers (t) |
101 | 1 | 0 | |
|
Little Creek Farm |
101 | 0 | 0 | |
|
Mamma Rosa Ristorante Somers (t) |
101 | 0 | 0 | |
|
Moderne Barn North Castle (t) |
101 | 0 | 0 | |
|
Nicos Deli |
101 | 0 | 0 | |
|
Norfield Corporate Park North Salem (t) |
101 | 0 | 0 | |
|
North Castle Water District #8 North Castle (t) |
101 | 0 | 0 | |
|
North Salem Town Hall/library North Salem (t) |
101 | 1 | 0 | |
|
Old Salem Farm |
101 | 1 | 0 | |
|
Pound Ridge Golf Club Pound Ridge (t) |
101 | 0 | 0 | |
|
Rockledge Center Somers (t) |
101 | 0 | 0 | |
|
Route 100 Market Somers (t) |
101 | 0 | 0 | |
|
Saint Johns Episcopal Church |
101 | 0 | 0 | |
|
Salem Market Lewisboro (t) |
101 | 0 | 0 | |
|
Ward Pound Ridge Reservation Lewisboro (t) |
101 | 0 | 0 | |
|
Yellow Monkey Village Lewisboro (t) |
101 | 0 | 0 | |
|
121 Restaurant/bar North Salem (t) |
100 | 0 | 0 | |
|
40 Deer Park Bedford (t) |
100 | 1 | 0 | |
|
Bedford Post Restaurant Bedford (t) |
100 | 0 | 0 | |
|
Bedford Village Plaza Bedford (t) |
100 | 1 | 0 | |
|
Country Childrens Center II (466) Bedford (t) |
100 | 0 | 0 | |
|
Edith Macy Camp of Tomorrow Ossining (t) |
100 | 0 | 0 | |
|
Gossett Brothers Nursery Lewisboro (t) |
100 | 0 | 0 | |
|
Grand Slam Banksville North Castle (t) |
100 | 1 | 0 | |
|
Hayfield Market North Salem (t) |
100 | 0 | 0 | |
|
John Jay Field House Lewisboro (t) |
100 | 0 | 0 | |
|
John Jay Homestead Bedford (t) |
100 | 0 | 0 | |
|
LA Cremaillere North Castle (t) |
100 | 1 | 0 | |
|
Lakeside Field Club North Salem (t) |
100 | 1 | 0 |
Inactive systems (85, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
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.