Data / Rankings / Share of days with good air quality (US EPA AQI) / Counties in New York

Counties in New York by share of days with good air quality (US EPA AQI)

Schenectady County had the highest share of days with good air quality (US EPA AQI) of 34 counties in 2006, at 97%. Bronx County had the lowest, at 39.7%. The median was 82.8%. Source: EPA.

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Highest97Schenectady County
Lowest39.7Bronx County
Median82.834 counties

Map of counties, 2006

Albany County: 83.3 %Bronx County: 39.7 %Chautauqua County: 73.7 %Chemung County: 91.9 %Dutchess County: 94.9 %Erie County: 63.8 %Essex County: 76.7 %Franklin County: 94.8 %Hamilton County: 91.3 %Herkimer County: 94.4 %Jefferson County: 86.9 %Kings County: 82.2 %Madison County: 90.5 %Monroe County: 78.4 %Nassau County: 80.2 %New York County: 49.3 %Niagara County: 74.5 %Oneida County: 88.3 %Onondaga County: 85.2 %Orange County: 72.7 %Oswego County: 80.8 %Putnam County: 88.3 %Queens County: 49 %Rensselaer County: 89.5 %Richmond County: 59.2 %St. Lawrence County: 79 %Saratoga County: 90.3 %Schenectady County: 97 %Steuben County: 65.2 %Suffolk County: 70.4 %Tompkins County: 87.4 %Ulster County: 88.3 %Wayne County: 88.6 %Westchester County: 75.2 %
  • Under 68
  • 68 to 77
  • 77 to 83
  • 83 to 88
  • 88 to 91
  • 91 and over
  • No data
%, 2006. Hatched areas have no value for this period. Source: Invokely calculation with data from EPA. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2006

Schenectady County: 97 %Schenectady County97Dutchess County: 94.9 %Dutchess County94.9Franklin County: 94.8 %Franklin County94.8Herkimer County: 94.4 %Herkimer County94.4Chemung County: 91.9 %Chemung County91.9Hamilton County: 91.3 %Hamilton County91.3Madison County: 90.5 %Madison County90.5Saratoga County: 90.3 %Saratoga County90.3Rensselaer County: 89.5 %Rensselaer County89.5Wayne County: 88.6 %Wayne County88.6Oneida County: 88.3 %Oneida County88.3Putnam County: 88.3 %Putnam County88.3Ulster County: 88.3 %Ulster County88.3Tompkins County: 87.4 %Tompkins County87.4Jefferson County: 86.9 %Jefferson County86.9Onondaga County: 85.2 %Onondaga County85.2Albany County: 83.3 %Albany County83.3Kings County: 82.2 %Kings County82.2Oswego County: 80.8 %Oswego County80.8Nassau County: 80.2 %Nassau County80.2St. Lawrence County: 79 %St. Lawrence County79Monroe County: 78.4 %Monroe County78.4Essex County: 76.7 %Essex County76.7Westchester County: 75.2 %Westchester County75.2Niagara County: 74.5 %Niagara County74.5Chautauqua County: 73.7 %Chautauqua County73.7Orange County: 72.7 %Orange County72.7Suffolk County: 70.4 %Suffolk County70.4Steuben County: 65.2 %Steuben County65.2Erie County: 63.8 %Erie County63.8Richmond County: 59.2 %Richmond County59.2New York County: 49.3 %New York County49.3Queens County: 49 %Queens County49Bronx County: 39.7 %Bronx County39.7Schenectady County: 97 %Schenectady County97Dutchess County: 94.9 %Dutchess County94.9Franklin County: 94.8 %Franklin County94.8Herkimer County: 94.4 %Herkimer County94.4Chemung County: 91.9 %Chemung County91.9Hamilton County: 91.3 %Hamilton County91.3Madison County: 90.5 %Madison County90.5Saratoga County: 90.3 %Saratoga County90.3Rensselaer County: 89.5 %Rensselaer County89.5Wayne County: 88.6 %Wayne County88.6Oneida County: 88.3 %Oneida County88.3Putnam County: 88.3 %Putnam County88.3Ulster County: 88.3 %Ulster County88.3Tompkins County: 87.4 %Tompkins County87.4Jefferson County: 86.9 %Jefferson County86.9Onondaga County: 85.2 %Onondaga County85.2Albany County: 83.3 %Albany County83.3Kings County: 82.2 %Kings County82.2Oswego County: 80.8 %Oswego County80.8Nassau County: 80.2 %Nassau County80.2St. Lawrence County: 79 %St. Lawrence County79Monroe County: 78.4 %Monroe County78.4Essex County: 76.7 %Essex County76.7Westchester County: 75.2 %Westchester County75.2Niagara County: 74.5 %Niagara County74.5Chautauqua County: 73.7 %Chautauqua County73.7Orange County: 72.7 %Orange County72.7Suffolk County: 70.4 %Suffolk County70.4Steuben County: 65.2 %Steuben County65.2Erie County: 63.8 %Erie County63.8Richmond County: 59.2 %Richmond County59.2New York County: 49.3 %New York County49.3Queens County: 49 %Queens County49Bronx County: 39.7 %Bronx County39.7
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2006 (%)Change on 2005
1Schenectady County97+6 pts
2Dutchess County94.9+3.6 pts
3Franklin County94.8+8.5 pts
4Herkimer County94.4+4.2 pts
5Chemung County91.9+2.8 pts
6Hamilton County91.3+1.8 pts
7Madison County90.5+6.7 pts
8Saratoga County90.3+8.4 pts
9Rensselaer County89.5+5.5 pts
10Wayne County88.6-1.1 pts
11Oneida County88.3-2 pts
11Putnam County88.3+10.3 pts
11Ulster County88.3+3.2 pts
14Tompkins County87.4+11.9 pts
15Jefferson County86.9+11.3 pts
16Onondaga County85.2+6.6 pts
17Albany County83.3+12.9 pts
18Kings County82.2+4.7 pts
19Oswego County80.8+7.1 pts
20Nassau County80.2+3.2 pts
21St. Lawrence County79+8.7 pts
22Monroe County78.4+5.2 pts
23Essex County76.7+7.1 pts
24Westchester County75.2+5.7 pts
25Niagara County74.5+7.1 pts
26Chautauqua County73.7+7.7 pts
27Orange County72.7+16.3 pts
28Suffolk County70.4+0.5 pts
29Steuben County65.2+8.7 pts
30Erie County63.8+6 pts
31Richmond County59.2+1.4 pts
32New York County49.3+2.5 pts
33Queens County49+6 pts
34Bronx County39.7+11.8 pts

Other periods

About this ranking

Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.

United States counties with air quality monitors only, about 1,000 of some 3,100 in recent years; a county without monitors has no value. The number of days with an AQI differs between counties because some monitors run only in the ozone season.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. 5 counties with data in other periods have no value for 2006 and are left out rather than filled from another source. Equal values share a rank.

How to cite

U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Environmental Protection Agency. (2026). EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts (Counties in New York by share of days with good air quality (US EPA AQI), 2006) [Data set]. Retrieved October 12, 2026, from https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual

MLA 9

EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts, Counties in New York by share of days with good air quality (US EPA AQI), 2006. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2006. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Counties in New York by share of days with good air quality (US EPA AQI), 2006. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2006.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts, Counties in New York by share of days with good air quality (US EPA AQI), 2006 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2006 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_new_york_2006,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts: Counties in New York by share of days with good air quality (US EPA AQI), 2006}},
  year = {2026},
  howpublished = {Data set},
  url = {https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2006. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download\_files.html\#Annual. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Environmental Protection Agency
TI  - EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts: Counties in New York by share of days with good air quality (US EPA AQI), 2006
PY  - 2026
DA  - 2026/07/13
PB  - U.S. Environmental Protection Agency
DB  - Invokely
UR  - https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual
L2  - https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2006
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2006.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest share of days with good air quality (US EPA AQI)?

Schenectady County, with 97% in 2006, according to EPA.

Which county has the lowest share of days with good air quality (US EPA AQI)?

Bronx County, with 39.7% in 2006.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Environmental Protection Agency, EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Retrieved 2026-10-12. 5 counties have no value for 2006 and are not ranked.

Share of days with good air quality (US EPA AQI): other rankings

Counties in New York: more rankings