# Counties in New York by median Air Quality Index (US EPA), 2012

All 33 values come from U.S. Environmental Protection Agency for 2012, so the places are comparable. 6 counties have no value for that period and are not ranked.

- Indicator id: `aqi_median`
- Unit: index
- Definition: Median of the daily Air Quality Index (AQI) values of a US county over the days of the year with an AQI, from the EPA AirData annual summaries. The daily county AQI is the highest AQI among the monitors and pollutants reported that day (ozone, PM2.5, PM10, carbon monoxide and nitrogen dioxide). Lower is cleaner: 0 to 50 is good, 51 to 100 moderate and above 100 unhealthy for sensitive groups.
- Source: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: median daily AQI (https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual)
- Publisher page: https://invokely.ai/en/publishers/environmental-protection-agency
- Retrieved: 2026-10-12
- Citation: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median daily AQI. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/median-air-quality-index/new-york-counties

| Rank | Place | index |
|---:|---|---:|
| 1 | New York County | 54 |
| 2 | Bronx County | 53 |
| 3 | Erie County | 52 |
| 4 | Kings County | 51 |
| 4 | Niagara County | 51 |
| 4 | Richmond County | 51 |
| 7 | Queens County | 50 |
| 8 | Nassau County | 46 |
| 9 | Monroe County | 44 |
| 9 | Suffolk County | 44 |
| 11 | Westchester County | 43 |
| 12 | Albany County | 42 |
| 12 | Oneida County | 42 |
| 12 | Orange County | 42 |
| 12 | Rockland County | 42 |
| 16 | Essex County | 41 |
| 17 | Chautauqua County | 40 |
| 18 | Tompkins County | 37 |
| 19 | Ulster County | 36 |
| 20 | Onondaga County | 35 |
| 20 | Steuben County | 35 |
| 22 | Hamilton County | 34 |
| 22 | Oswego County | 34 |
| 22 | Rensselaer County | 34 |
| 25 | Chemung County | 33 |
| 25 | Herkimer County | 33 |
| 25 | Madison County | 33 |
| 25 | Wayne County | 33 |
| 29 | Dutchess County | 32 |
| 29 | Jefferson County | 32 |
| 31 | Saratoga County | 31 |
| 32 | Putnam County | 29 |
| 33 | Franklin County | 12 |