EPA-regulated facilities in Westchester County, NY
There are 9,394 EPA-regulated facilities inside Westchester County, New York. The most common kinds are hazardous waste (7,118), water discharge (1,834), air emissions (759). 79 are currently in significant noncompliance, the EPA's designation for the most serious or persistent violations, and 152 have a violation on record. Penalties over the last five years total $19M across 46 sites.
Open the map of Westchester County
By category
| Category | Facilities |
|---|---|
| Hazardous waste | 7,118 |
| Treatment, storage or disposal | 1 |
| Large quantity generators | 199 |
| Small quantity generators | 1,020 |
| Transporters | 12 |
| Chemical (RMP/TRI) | 128 |
| Superfund | 15 |
| Air emissions | 759 |
| Major sources | 10 |
| Synthetic minor sources | 88 |
| Minor sources | 629 |
| Water discharge | 1,834 |
| Major permits | 9 |
| Minor permits | 1,038 |
| Drinking water systems | 366 |
| Greenhouse gas reporters | 4 |
| Data centers | 2 |
| Scrap yards | 1 |
| Recycling centers | 5 |
A facility enrolled in several programs counts once in the total and once in each of its categories.
In significant noncompliance
The EPA's designation for its most serious or persistent violations, as of the latest data.
- MOUNT VERNON MS4 STORM SEWERS Significant noncompliance · $200k in penalties
- BROCKWAY PLACE TRANSFER STATION Significant noncompliance · $38k in penalties
- POLYCHRON MARINA CO INC Significant noncompliance · $10k in penalties
- PRIMO BRANDS YORKTOWN HEIGHTS Significant noncompliance · $1k in penalties
- KIMBER MFG., INC. Significant noncompliance · $1k in penalties
- GLEN ISLAND YACHT CLUB Significant noncompliance · $1k in penalties
- FINCH COUNTRY STORE Significant noncompliance
- BRIDLESIDE APARTMENTS Significant noncompliance
- CHAPPAQUA CSD MS4 STORM SEWERS Significant noncompliance
- PLEASANTVILLE MS4 STORM SEWERS Significant noncompliance
Largest penalties
Penalties assessed over the last five years.
- UNITED PARCEL SERVICE - YORKTOWN HEIGHTS NYYOR $5.3M in penalties
- UNITED PARCEL SERVICE - ELMSFORD- NYELF $5.3M in penalties
- UNITED PARCEL SERVICE - YONKERS NYYON $5.3M in penalties
- WESTCHESTER JOINT WATER WORKS-TREATMENT PLANT 830 LAKE STREET $1.2M in penalties
- NYC DEP KENSICO RESERVOIR $1.1M in penalties
Superfund sites
- CANADIAN RADIUM & URANIUM CORP
- LITHIUM SYSTEMS DIVISION
- CROTON POINT SANITARY LANDFILL
- KATONAH MUNICIPAL WELL
- ANDERSON HILL ASBESTOS SITE
- PORT REFINERY
- WHITE PLAINS MERCURY
- MAGNA METALS
- U.S. VA HUDSON VALLEY HEALTHCARE SYSTEM - MONTROSE CAMPUS Significant noncompliance
- STAUFFER CHEMICAL /EASTERN RESEARCH CENT
Data centers
Towns in Westchester County
- Yonkers
- New Rochelle
- Mount Vernon
- White Plains
- Port Chester
- Ossining
- Peekskill
- Eastchester
- Mamaroneck
- Scarsdale
- Rye
- Jefferson Valley-Yorktown
- Tarrytown
- Dobbs Ferry
- Sleepy Hollow
- Mount Kisco
Bordering counties
- Bergen County, NJ
- Bronx County
- Putnam County
- Rockland County
- Western Connecticut Planning Region, CT
Reading these numbers
These are regulatory records, not measurements of pollution. Most facilities appear because they hold a permit or file reports, and most of them are compliant; a listing is not a claim that a facility has polluted anything. Compliance status and penalties are the EPA's own determinations in data retrieved Oct 9, 2026. The Data page explains where each record comes from and how it can mislead.