Water quality in Thornwood, New York
Thornwood is in Westchester County. 273 active public water systems serve the county; 93 had an EPA violation in the past three years.
Most likely your provider
Your location is within the outer bounds of this system's EPA service area.
Other community water systems in Westchester County
91 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Pleasantville Water District Mount Pleasant (t) |
9,550 | 1 | 1.3 mi | |
| Old Farm Hill Water District Mount Pleasant (t) |
1,768 | 0 | 1.8 mi | |
| Bear Ridge Lake Water District Mount Pleasant (t) |
518 | 0 | 1.9 mi | |
| Applehill Farm Water District Mount Pleasant (t) |
209 | 0 | 1.9 mi | |
| Pleasant Ridge Water District Mount Pleasant (t) |
95 | 0 | 1.9 mi | |
| Meadowbrook Water District Mount Pleasant (t) |
91 | 0 | 1.9 mi | |
| Mill River Water District Mount Pleasant (t) |
74 | 0 | 1.9 mi | |
| Pleasantville Road Water District Mount Pleasant (t) |
56 | 0 | 1.9 mi | |
| Pleasantville Extension #1 Mount Pleasant (t) |
49 | 0 | 1.9 mi | |
| Pace University Mount Pleasant (t) |
2,753 | 1 | 1.9 mi | |
| Westchester County WD #3 Greenburgh (t) |
6,000 | 1 | 2.9 mi | |
| North Castle Water District #5 North Castle (t) |
225 | 0 | 2.9 mi | |
| Briarcliff Manor Village Briarcliff Manor (v) |
9,190 | 0 | 3.3 mi | |
| North Castle Water District #4 North Castle (t) |
1,225 | 1 | 3.6 mi | |
| North Castle Water District #1 North Castle (t) |
2,500 | 2 | 3.9 mi | |
| Sleepy Hollow (village) Mount Pleasant (t) |
9,870 | 0 | 4.5 mi | |
| New Castle/stanwood W.d. New Castle (t) |
17,116 | 0 | 4.5 mi | |
| Saint Nersess Armenian Seminary North Castle (t) |
32 | 0 | 4.8 mi | |
| Elmsford Village Elmsford (v) |
5,293 | 0 | 4.8 mi | |
| Ossining Water Department Ossining (t) |
30,000 | 0 | 5.3 mi | |
| Tarrytown Water Supply Tarrytown (v) |
11,000 | 1 | 5.3 mi | |
| Pocantico Hills Water District Mount Pleasant (t) |
329 | 0 | 5.3 mi | |
| North Castle Water District #2 North Castle (t) |
1,200 | 0 | 5.7 mi | |
| Greenburgh Consolidated WD #1 Greenburgh (t) |
43,312 | 0 | 6.2 mi | |
| Mount Kisco Water Department Mount Kisco (v) |
11,187 | 1 | 6.4 mi |
Non-community systems in Westchester County (181: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Swiss RE of America |
800 | 1 | 0 | |
|
Cranberry Lake North Castle (t) |
250 | 1 | 0 | |
|
Edith Macy Camp of Tomorrow Ossining (t) |
100 | 0 | 0 | |
|
Citigroup Exec. Planning Center |
40 | 3 | 0 | |
|
North Castle Pool &tennis Club North Castle (t) |
400 | 0 | 0 | |
|
1 Byram Brook Pl. North Castle (t) |
50 | 1 | 0 | |
|
2 Byram Brook Pl. North Castle (t) |
50 | 1 | 0 | |
|
Breezemont Day Camp North Castle (t) |
550 | 0 | 0 | |
|
Church of St. Patrick North Castle (t) |
200 | 0 | 0 | |
|
Armonk Fire District #2 North Castle (t) |
60 | 2 | 0 | |
|
Moderne Barn North Castle (t) |
101 | 0 | 0 | |
|
Armonk Alliance Church North Castle (t) |
208 | 0 | 0 | |
|
North Castle Water District #8 North Castle (t) |
101 | 0 | 0 | |
|
28 Kaysal Court Office Bldg. North Castle (t) |
50 | 1 | 0 | |
|
Nicks Corner Market/pirmar Food Corp. North Castle (t) |
25 | 1 | 0 | |
|
Byram Hills High School North Castle (t) |
973 | 0 | 0 | |
|
Congregation Bnai Israel North Castle (t) |
30 | 0 | 0 | |
|
Armonk Tennis Club North Castle (t) |
200 | 0 | 0 | |
|
Church of Jesus Christ Lds Ossining (t) |
300 | 0 | 0 | |
|
Kingdom Hall of Jehovahs Wit Ossining (t) |
125 | 1 | 0 | |
|
Northern Westchester 103-105 Bedford (t) |
160 | 0 | 0 | |
|
Travelers Restaurant Yorktown (t) |
150 | 1 | 0 | |
|
Chabad of Bedford Bedford (t) |
120 | 1 | 0 | |
|
Unitarian Universalist of N. West Bedford (t) |
50 | 1 | 0 | |
|
325 West Patent Road Mount Kisco (v) |
365 | 0 | 0 | |
|
Country Childrens Center Yorktown Yorktown (t) |
79 | 1 | 0 | |
|
Fox Lane High & Middle Schools Mount Kisco (v) |
3,000 | 0 | 0 | |
|
Chestnut Ridge Racquet Club Bedford (t) |
220 | 1 | 0 | |
|
Teatown Lake Reservation Cortlandt (t), Yorktown (t) |
100 | 1 | 0 | |
|
LA Cremaillere North Castle (t) |
100 | 1 | 0 | |
|
Grand Slam Banksville North Castle (t) |
100 | 1 | 0 | |
|
Finch Country Store |
25 | 1 | 0 | |
|
Temple Shaaray Tefila Bedford (t) |
75 | 0 | 0 | |
|
Bedford Rest Area Nys RT 684 Bedford (t) |
1,000 | 2 | 0 | |
|
Nadines Restaurant Yorktown (t) |
80 | 1 | 0 | |
|
West Patent Elementary School Bedford (t) |
400 | 0 | 0 | |
|
Bedford Village Plaza Bedford (t) |
100 | 1 | 0 | |
|
Young Judaea Sprout Westchester Cortlandt (t) |
120 | 1 | 0 | |
|
Bedford Community Church Bedford (t) |
250 | 0 | 0 | |
|
Rippowam Cisqua School Bedford Bedford (t) |
425 | 1 | 0 | |
|
Glen Arbor Golf Club Bedford (t) |
101 | 0 | 0 | |
|
Saint Matthews Episcopal Church Bedford (t) |
100 | 0 | 0 | |
|
Muscoot Farm Somers (t) |
150 | 0 | 0 | |
|
Bedford Post Restaurant Bedford (t) |
100 | 0 | 0 | |
|
Caramoor Center for Music Art Bedford (t) |
50 | 0 | 0 | |
|
Nys Dot Residency Katonah Bedford (t) |
30 | 1 | 1 | |
|
John Jay Homestead Bedford (t) |
100 | 0 | 0 | |
|
Lasdon Park Somers (t) |
25 | 0 | 0 | |
|
Cortlandt Des Cortlandt (t) |
40 | 1 | 0 | |
|
Croton Study House Cortlandt (t) |
27 | 1 | 0 |
About this data
Water systems are matched to Westchester County, nearest to Thornwood first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau county subdivision files or the centre of the first town EPA lists the system as serving, from Census Bureau place files.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
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.