Onondaga, 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. This is a different measure than the EJ Screening score for this county, which ranks it by percentile against other tracked counties rather than against these fixed caps.
Environmental data for Onondaga in New York · Population: 471,611
TRI sites such as Anheuser-Busch LLC; Chemtrade Solutions-Syracuse; Anoplate Corp; SDWIS systems such as SYRACUSE CITY; DEWITT WDS - SOUTH; CLAY WDS; NPL sites such as Onondaga Lake anchor Onondaga, NY's EPA extract. Derived burden score 68/100 (High Risk) uses fixed national caps on density, log release volume, Superfund count, and health-flagged systems - not an official EPA rating.
EPCRA disclosures in Onondaga total 7.5M lbs; health-flagged SDWIS rows include SYRACUSE CITY; DEWITT WDS - SOUTH; SKANEATELES WDS, while Anheuser-Busch LLC leads TRI pounds. AQS median AQI 35 / peak 84 in 2024.
Largest TRI sites in the extract: Anheuser-Busch LLC; Chemtrade Solutions-Syracuse; Anoplate Corp. Named SDWIS systems: SYRACUSE CITY; DEWITT WDS - SOUTH; CLAY WDS. NPL sites on record: Onondaga Lake. Burden score 68/100 (High Risk) is the only weighted composite here; tables reproduce EPA disclosure history, not a current-safety verdict.
Release-over-release change
What changed for Onondaga, NY: EPA TRI 2023 reporting year
Same facilities, both years
+42.5%
29 facilities that filed in 2022 and 2023
Whole inventory
+42.5%
1.4 million lb → 1.9 million lb, every facility that filed
Between the two reporting years, 0 facilities filed for the first time and 2 stopped filing. Facilities entering or leaving the inventory are excluded from the same-facility comparison above.
- Onondaga, NY's total reported releases rose from 1.4 million lb in 2022 to 1.9 million lb in 2023, based on EPA TRI filings.
- Onondaga, NY's off-site transfers rose from 61.2 thousand lb in 2022 to 854.4 thousand lb in 2023, based on EPA TRI filings.
- Onondaga, NY's air releases fell from 65.8 thousand lb in 2022 to 43.7 thousand lb in 2023, based on EPA TRI filings.
- Onondaga, NY's water releases fell from 1.2 million lb in 2022 to 1.0 million 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 | 317 (87%) | 48 | 0 | 84 |
| 2023 | 273 (76%) | 80 | 4 | 258 |
| 2022 | 316 (87%) | 49 | 0 | 69 |
| 2021 | 279 (76%) | 85 | 1 | 113 |
| 2020 | 300 (82%) | 64 | 0 | 74 |
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 (29)
| System | System pop (SDWIS) | Violations |
|---|---|---|
| SYRACUSE CITY | 192,000 | 21 |
| DEWITT WDS - SOUTH | 16,200 | 1 |
| CLAY WDS | 16,000 | 0 |
| DEWITT WDS - NORTH | 13,600 | 0 |
| BALDWINSVILLE VILLAGE | 9,200 | 0 |
| SKANEATELES WDS | 3,500 | 17 |
| SKANEATELES VILLAGE | 2,610 | 17 |
| ELBRIDGE VILLAGE | 1,519 | 20 |
| JORDAN VILLAGE | 1,400 | 21 |
| ONONDAGA NATION WS | 1,200 | 0 |
| TULLY VILLAGE | 930 | 0 |
| WELLESLEY ISLAND WATER CORP. | 548 | 2 |
| ONONDAGA NATION - NATIVE AMERICAN | 450 | 0 |
| SANDRIDGE MOBILE HOME PARK | 450 | 7 |
| CHAMPION PARK | 400 | 0 |
| OWEGO HEIGHTS MOBILE HOME PARK | 240 | 0 |
| HIDDEN HILLS | 200 | 0 |
| WOODED ESTATES MOBILE HOME COURT | 192 | 0 |
| CARDIFF TOOKES SPRING | 152 | 0 |
| BUTTERNUT LANDING MHP | 129 | 0 |
| GREEN VALLEY MHP | 120 | 0 |
| LORDS HILL APARTMENTS | 100 | 1 |
| CANDOR LANDING | 99 | 0 |
| SCOTCH PINE MANOR | 84 | 1 |
| ROCKY POINT HOMEOWNERS ASSN | 80 | 1 |
| DELPHI FALLS PARK | 78 | 12 |
| FESTIVAL GARDEN APARTMENTS | 72 | 0 |
| MOBILE MANOR MOBILE HOME PARK | 58 | 1 |
| ESTATE TOWNHOUSES | 50 | 6 |
TRI Facilities (33)
Superfund Sites (1)
| Site Name | Status | HRS Score |
|---|---|---|
| Onondaga Lake | NPL Site | 50.00 |
Cities in Onondaga (18)
Frequently Asked Questions
What is the environmental risk level in Onondaga, New York? ▼
Are there Superfund sites in Onondaga? ▼
How many toxic release facilities are in Onondaga? ▼
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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.