Westchester, NY
Transparent derived index from EPA TRI / SDWIS / Superfund extracts: not an official EPA rating. Fixed caps: facilities ≤25 pts (50+ = max), log10 releases ≤25 pts, Superfund ≤25 pts (5/site), health-violation systems ≤15 pts (3/system), high-chemical facilities ≤10 pts. Bands: High ≥60, Moderate ≥30. See methodology.
Environmental data for Westchester in New York · Population: 996,888
TRI sites such as Colors & Effects USA LLC - Peekskill Facility; Metallized Carbon Corp; U.S. Army National Guard Camp Smith Training Site Ranges; SDWIS systems such as NEW YORK CITY SYSTEM; YONKERS CITY; GREENBURGH CONSOLIDATED WD #1; NPL sites such as Katonah Municipal Well; Magna Metals anchor Westchester, NY's EPA extract. Derived burden score 50/100 (Moderate Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
Health-flagged SDWIS rows in Westchester include NEW YORK CITY SYSTEM; YONKERS CITY; GREENBURGH CONSOLIDATED WD #1, while Colors & Effects USA LLC - Peekskill Facility leads reported TRI pounds among local Form R filers. AQS median AQI 36 / peak 143 in 2024.
Burden score 50/100 (Moderate Risk) is the only weighted composite on this page. The tables below list every TRI facility, SDWIS system, and Superfund site EPA has on record for Westchester -- not just the names called out above -- reproducing the disclosure history as filed, not a current-safety verdict. Extract current as of 2026-08-25.
Release-over-release change
What changed for Westchester, NY: EPA TRI 2023 reporting year
Same facilities, both years
-26.0%
14 facilities that filed in 2022 and 2023
Whole inventory
-26.0%
46.2 thousand lb → 34.2 thousand lb, every facility that filed
Between the two reporting years, 1 facility filed for the first time and 1 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Westchester, NY's total reported releases fell from 46.2 thousand lb in 2022 to 34.2 thousand lb in 2023, based on EPA TRI filings.
- Westchester, NY's off-site transfers fell from 36.5 thousand lb in 2022 to 25.1 thousand lb in 2023, based on EPA TRI filings.
- Westchester, NY's air releases fell from 4.6 thousand lb in 2022 to 4.2 thousand lb in 2023, based on EPA TRI filings.
- Westchester, NY's land releases fell from 5.1 thousand lb in 2022 to 4.8 thousand lb in 2023, based on EPA TRI filings.
Air Quality History (2020–2024)
EPA Air Quality Index (AQI) data showing how many days per year fall into each air quality category.
| Year | Good | Moderate | Unhealthy (SG) | Max AQI |
|---|---|---|---|---|
| 2024 | 302 (83%) | 57 | 6 | 143 |
| 2023 | 287 (79%) | 71 | 4 | 198 |
| 2022 | 300 (82%) | 65 | 0 | 100 |
| 2021 | 307 (84%) | 52 | 6 | 143 |
| 2020 | 305 (84%) | 57 | 1 | 105 |
Source: EPA Air Quality System (AQS) Annual AQI by County AQI categories: Good (0-50), Moderate (51-100), Unhealthy for Sensitive Groups (101-150), Unhealthy (151-200), Very Unhealthy (201-300), Hazardous (301+)
For real-time air quality readings and pollutant breakdowns in New York, see the EPA's AirNow.gov.
Water Systems (117)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| NEW YORK CITY SYSTEM | 8,271,000 | 1 |
| YONKERS CITY | 211,569 | 1 |
| GREENBURGH CONSOLIDATED WD #1 | 86,624 | 1 |
| MOUNT VERNON WATER DEPARTMENT | 73,893 | 1 |
| WESTCHESTER JOINT WATER WORKS | 59,629 | 5 |
| WHITE PLAINS CITY | 59,559 | 0 |
| YORKTOWN CONSOLD. WATER DIST.#1 | 36,000 | 4 |
| OSSINING WATER DEPARTMENT | 30,000 | 1 |
| CORTLANDT CONSOLIDATED WD | 28,369 | 0 |
| PEEKSKILL CITY | 24,272 | 0 |
| SCARSDALE WATER DEPARTMENT | 21,649 | 0 |
| KENSICO WATER DISTRICT | 17,917 | 12 |
| NEW CASTLE/STANWOOD W.D. | 17,116 | 0 |
| MOUNT KISCO WATER DEPARTMENT | 11,187 | 9 |
| TARRYTOWN WATER SUPPLY | 11,000 | 3 |
| SLEEPY HOLLOW (VILLAGE) | 9,870 | 0 |
| PLEASANTVILLE WATER DISTRICT | 9,550 | 0 |
| BRIARCLIFF MANOR VILLAGE | 9,190 | 2 |
| BEDFORD CONSOLIDATED W.D. | 9,056 | 0 |
| CROTON ON HUDSON VILLAGE | 8,000 | 0 |
| IRVINGTON WATER SUPPLY | 6,631 | 0 |
| LARCHMONT VILLAGE | 6,485 | 0 |
| WESTCHESTER COUNTY WD #3 | 6,000 | 11 |
| ELMSFORD VILLAGE | 5,293 | 0 |
| SOMERS CONSOLIDATED WATER DISTRICT #1 | 3,848 | 0 |
| PACE UNIVERSITY | 2,753 | 0 |
| NORTH CASTLE WATER DISTRICT #1 | 2,500 | 0 |
| OLD FARM HILL WATER DISTRICT | 1,768 | 9 |
| OLD POST ROAD WATER DISTRICT | 1,500 | 0 |
| NORTH CASTLE WATER DISTRICT #4 | 1,225 | 20 |
| NORTH CASTLE WATER DISTRICT #2 | 1,200 | 25 |
| GREENBRIAR SUBDIVISION | 956 | 0 |
| COTTAGES OF BOONE | 890 | 0 |
| HUNTERS GLEN CONDOMINIUM WS | 875 | 0 |
| KHAL ADAS KASHAU | 650 | 8 |
| SUNSET RIDGE WATER DISTRICT | 625 | 55 |
| VILLAGE CREST APARTMENTS | 600 | 0 |
| REED FARM CONDOMINIUMS W.S. | 600 | 0 |
| BEAR RIDGE LAKE WATER DISTRICT | 518 | 0 |
| HARVEY SCHOOL | 510 | 45 |
| LINCOLN HALL SCHOOL | 500 | 0 |
| HARRIS WOODS HOA | 440 | 0 |
| HILL SPARROW MASTER HOA | 432 | 30 |
| TRUESDALE CORPORATION | 400 | 0 |
| THE PARAMOUNT AT SOMERS REHAB CENTER | 400 | 13 |
| FOUR WINDS HOSPITAL | 400 | 2 |
| MAPLE HILL CONDOMINIUM W.S. | 380 | 0 |
| TWIN LAKES WATER CO., INC. | 366 | 1 |
| LAKE KATONAH CLUB INC | 356 | 5 |
| MICHELLE ESTATES | 340 | 0 |
| PIETSCH GARDENS | 337 | 16 |
| POCANTICO HILLS WATER DISTRICT | 329 | 9 |
| HOPEWELL GARDENS | 300 | 3 |
| CEDAR VALLEY WATERWORKS | 300 | 1 |
| YESHIVA FARM SETTLEMENT | 300 | 100 |
| THE FARMS WATER DISTRICT | 300 | 38 |
| PABST WATER DISTRICT | 253 | 35 |
| GLASSBURY COURT AT COLD SPRING | 250 | 0 |
| SOCIETY HILL CONDOMINIUMS W.S. | 250 | 0 |
| GOLDENS BRIDGE COMMUNITY ASSOC | 250 | 29 |
| VILLAGE ON CHOPMIST HILL, THE | 250 | 0 |
| WILLIAMSBURG RIDGE CONDO W.S. | 230 | 0 |
| BRIDLESIDE APARTMENTS | 230 | 0 |
| NORTH CASTLE WATER DISTRICT #5 | 225 | 0 |
| CROTON FALLS WATER DISTRICT | 216 | 2 |
| CALE FARMS WATER WORKS | 212 | 0 |
| APPLEHILL FARM WATER DISTRICT | 209 | 0 |
| FLEMINGS MOBILE HOME PARK | 200 | 0 |
| CEDAR DOWNS WATER DISTRICT | 195 | 0 |
| SAWKILL COMMUNITY | 186 | 3 |
| SALEM CHASE | 175 | 0 |
| ARK PARK | 170 | 0 |
| LEWISBORO COMMONS | 168 | 0 |
| CLEARING IN THE WOODS | 162 | 0 |
| HUNT FARM WATER COMPANY | 156 | 8 |
| RED COMMUNITY LLC | 150 | 0 |
| KITCHAWAN WATER DISTRICT | 150 | 0 |
| COTSWOLD WATER SUPPLY | 150 | 5 |
| SALEM ACRES ASSOC | 138 | 2 |
| SUNSHINE CHILDRENS HOME & REHAB CENTER | 130 | 10 |
| RAI PARK | 125 | 0 |
| PLEASANT VIEW MHP | 125 | 0 |
| CANDLEWOOD PARK WATER DISTRICT | 125 | 0 |
| DEANS CORNERS WATER WORKS | 107 | 0 |
| TWIN BROOK MANOR CONDOMINIUM | 103 | 0 |
| KEELER FIELD | 100 | 2 |
| BREWSTER WOODS CONDOMINIUM | 99 | 0 |
| WOODS AT KINGS POND CONDO W.S. | 96 | 0 |
| PLEASANT RIDGE WATER DISTRICT | 95 | 0 |
| MEADOWBROOK WATER DISTRICT | 91 | 0 |
| GREAT OAK PROPERTIES | 90 | 0 |
| LONG ACRES MOBILE HOME PARK | 86 | 0 |
| RAMLEH WATER WORKS CORP. INC. | 80 | 0 |
| MILL RIVER WATER DISTRICT | 74 | 0 |
| STREAMSIDE ESTATES | 67 | 0 |
| HIGHFIELDS CONDO | 64 | 0 |
| PARK ESTATES MHP | 63 | 0 |
| CRESTVIEW MANOR MOBILE HOME PARK | 60 | 0 |
| LAKE CARMEL PROFESSIONAL BLDG. | 60 | 2 |
| QUAIL RIDGE WATER WORKS CORP. | 60 | 0 |
| KENT APARTMENTS | 56 | 0 |
| PLEASANTVILLE ROAD WATER DISTRICT | 56 | 0 |
| CLOVE BRANCH APARTMENTS | 50 | 5 |
| PLEASANTVILLE EXTENSION #1 | 49 | 0 |
| L & D MOBILE HOME PARK, LLC | 45 | 7 |
| JUENGSTVILLE FARM ASSOCIATION | 45 | 0 |
| BEDFORD GOLF AND TENNIS CLUB | 44 | 0 |
| 796 BEDFORD ROAD APARTMENTS | 40 | 1 |
| GHENT MOBILE HOME PARK (ROLLING HILLS) | 35 | 2 |
| ST. JOSEPHS NOVITIATE(ABC CARE) | 35 | 2 |
| VIRGINIA WOODS CONDO | 35 | 0 |
| WINDHAM MOBILE HOME COMMUNITY | 33 | 4 |
| SAINT NERSESS ARMENIAN SEMINARY | 32 | 0 |
| MEADOW LAKE APARTMENTS | 20 | 0 |
| WESTCHESTER COUNTY WD #1 | 0 | 3 |
| WESTCHESTER COUNTY WD #2 | 0 | 0 |
| NORTHERN WESTCHESTER JOINT WATER WORKS | 0 | 1 |
TRI Facilities (16)
| # | Facility | Total Releases |
|---|---|---|
| 1 | Colors & Effects USA LLC - Peekskill Facility | 98.4K lbs |
| 2 | Metallized Carbon Corp | 49.5K lbs |
| 3 | U.S. Army National Guard Camp Smith Training Site Ranges | 29.3K lbs |
| 4 | Electronic Devices Inc. | 10.9K lbs |
| 5 | Por Products LLC | 3.5K lbs |
| 6 | Graphite Metallizing Corp | 1.3K lbs |
| 7 | Certainteed Gypsum Buchanan LLC | 41 lbs |
| 8 | Medi-Ray Inc | 21 lbs |
| 9 | Colors & Effects USA LLC - Pearl Plant | 19 lbs |
| 10 | Elcan Industries Inc | 13 lbs |
| 11 | Kimber Mfg Inc | 10 lbs |
| 12 | Srm - Mt Vernon | 6 lbs |
| 13 | Kimber Mfg Inc | 1 lbs |
| 14 | Rca Asphalt LLC | 0 lbs |
| 15 | American Sugar Refining Inc | 0 lbs |
| 16 | Byram Concrete & Supply LLC | 0 lbs |
Superfund Sites (2)
| Site Name | Status | HRS Score |
|---|---|---|
| Katonah Municipal Well | Deleted NPL Site | 35.35 |
| Magna Metals | NPL Site | 50.00 |
Cities in Westchester (42)
Frequently Asked Questions
What is the environmental risk level in Westchester, New York? ▼
Are there Superfund sites in Westchester? ▼
How many toxic release facilities are in Westchester? ▼
What is the air quality in Westchester? ▼
Is the drinking water safe in Westchester? ▼
What environmental agencies cover Westchester? ▼
What does this county environmental profile show?
This county environmental profile rolls up EPA Toxics Release Inventory facility reports, Safe Drinking Water Information System public-water-system filings, and Superfund National Priorities List sites for the county boundary defined by the U.S. Census Bureau. Facility counts reflect facilities with a reporting address inside the county, not where downstream environmental effects may be observed. Population figures are from the most recent Census ACS 5-year estimate. The county detail page is updated whenever the upstream EPA programs publish revised data; see the methodology page for the documented ingest cadence and the editorial choices governing how aggregations are computed.
Read our methodology - how this data is sourced, computed, and verified.