Water quality for ZIP code 10594
ZIP 10594 covers Thornwood in Westchester County, New York, one of 74 ZIP codes in the 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 | 1.7 mi | |
| Old Farm Hill Water District Mount Pleasant (t) |
1,768 | 0 | 2.0 mi | |
| Bear Ridge Lake Water District Mount Pleasant (t) |
518 | 0 | 2.2 mi | |
| Applehill Farm Water District Mount Pleasant (t) |
209 | 0 | 2.2 mi | |
| Pleasant Ridge Water District Mount Pleasant (t) |
95 | 0 | 2.2 mi | |
| Meadowbrook Water District Mount Pleasant (t) |
91 | 0 | 2.2 mi | |
| Mill River Water District Mount Pleasant (t) |
74 | 0 | 2.2 mi | |
| Pleasantville Road Water District Mount Pleasant (t) |
56 | 0 | 2.2 mi | |
| Pleasantville Extension #1 Mount Pleasant (t) |
49 | 0 | 2.2 mi | |
| Pace University Mount Pleasant (t) |
2,753 | 1 | 2.3 mi | |
| North Castle Water District #5 North Castle (t) |
225 | 0 | 2.7 mi | |
| Westchester County WD #3 Greenburgh (t) |
6,000 | 1 | 2.7 mi | |
| North Castle Water District #4 North Castle (t) |
1,225 | 1 | 3.4 mi | |
| North Castle Water District #1 North Castle (t) |
2,500 | 2 | 3.5 mi | |
| Briarcliff Manor Village Briarcliff Manor (v) |
9,190 | 0 | 3.7 mi | |
| Elmsford Village Elmsford (v) |
5,293 | 0 | 4.6 mi | |
| Sleepy Hollow (village) Mount Pleasant (t) |
9,870 | 0 | 4.6 mi | |
| Saint Nersess Armenian Seminary North Castle (t) |
32 | 0 | 4.6 mi | |
| New Castle/stanwood W.d. New Castle (t) |
17,116 | 0 | 4.8 mi | |
| Tarrytown Water Supply Tarrytown (v) |
11,000 | 1 | 5.3 mi | |
| Pocantico Hills Water District Mount Pleasant (t) |
329 | 0 | 5.5 mi | |
| North Castle Water District #2 North Castle (t) |
1,200 | 0 | 5.6 mi | |
| Ossining Water Department Ossining (t) |
30,000 | 0 | 5.7 mi | |
| Greenburgh Consolidated WD #1 Greenburgh (t) |
43,312 | 0 | 5.9 mi | |
| White Plains City White Plains (c) |
59,559 | 0 | 6.6 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 | |
|
Citigroup Exec. Planning Center |
40 | 3 | 0 | |
|
Edith Macy Camp of Tomorrow Ossining (t) |
100 | 0 | 0 | |
|
1 Byram Brook Pl. North Castle (t) |
50 | 1 | 0 | |
|
North Castle Pool &tennis Club North Castle (t) |
400 | 0 | 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 | |
|
Grand Slam Banksville North Castle (t) |
100 | 1 | 0 | |
|
LA Cremaillere North Castle (t) |
100 | 1 | 0 | |
|
Finch Country Store |
25 | 1 | 0 | |
|
Fox Lane High & Middle Schools Mount Kisco (v) |
3,000 | 0 | 0 | |
|
Chestnut Ridge Racquet Club Bedford (t) |
220 | 1 | 0 | |
|
Country Childrens Center Yorktown Yorktown (t) |
79 | 1 | 0 | |
|
Temple Shaaray Tefila Bedford (t) |
75 | 0 | 0 | |
|
Teatown Lake Reservation Cortlandt (t), Yorktown (t) |
100 | 1 | 0 | |
|
Bedford Rest Area Nys RT 684 Bedford (t) |
1,000 | 2 | 0 | |
|
West Patent Elementary School Bedford (t) |
400 | 0 | 0 | |
|
Nadines Restaurant Yorktown (t) |
80 | 1 | 0 | |
|
Bedford Village Plaza Bedford (t) |
100 | 1 | 0 | |
|
Bedford Community Church Bedford (t) |
250 | 0 | 0 | |
|
Young Judaea Sprout Westchester Cortlandt (t) |
120 | 1 | 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 | |
|
Bedford Post Restaurant Bedford (t) |
100 | 0 | 0 | |
|
Muscoot Farm Somers (t) |
150 | 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 | |
|
Pound Ridge Golf Club Pound Ridge (t) |
101 | 0 | 0 | |
|
Lasdon Park Somers (t) |
25 | 0 | 0 | |
|
40 Deer Park Bedford (t) |
100 | 1 | 0 |
About this data
Water systems are matched to Westchester County, the county this ZIP code lies in, nearest to the ZIP code's centre 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.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA 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. Retrieved from ECHO on Oct 11, 2026.