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)

Dutchess County had the highest share of days with good air quality (US EPA AQI) of 34 counties in 2005, at 91.3%. Bronx County had the lowest, at 27.9%. The median was 75.6%. Source: EPA.

Keep it in a collection in your library.
Highest91.3Dutchess County
Lowest27.9Bronx County
Median75.634 counties

Map of counties, 2005

Albany County: 70.4 %Bronx County: 27.9 %Chautauqua County: 66 %Chemung County: 89.1 %Dutchess County: 91.3 %Erie County: 57.8 %Essex County: 69.6 %Franklin County: 86.3 %Hamilton County: 89.5 %Herkimer County: 90.2 %Jefferson County: 75.6 %Kings County: 77.5 %Madison County: 83.8 %Monroe County: 73.2 %Nassau County: 77 %New York County: 46.8 %Niagara County: 67.4 %Oneida County: 90.3 %Onondaga County: 78.6 %Orange County: 56.4 %Oswego County: 73.7 %Putnam County: 78 %Queens County: 43 %Rensselaer County: 84 %Richmond County: 57.8 %St. Lawrence County: 70.3 %Saratoga County: 81.9 %Schenectady County: 91 %Steuben County: 56.5 %Suffolk County: 69.9 %Tompkins County: 75.5 %Ulster County: 85.1 %Wayne County: 89.7 %Westchester County: 69.5 %
  • Under 58
  • 58 to 70
  • 70 to 76
  • 76 to 82
  • 82 to 89
  • 89 and over
  • No data
%, 2005. 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, 2005

Dutchess County: 91.3 %Dutchess County91.3Schenectady County: 91 %Schenectady County91Oneida County: 90.3 %Oneida County90.3Herkimer County: 90.2 %Herkimer County90.2Wayne County: 89.7 %Wayne County89.7Hamilton County: 89.5 %Hamilton County89.5Chemung County: 89.1 %Chemung County89.1Franklin County: 86.3 %Franklin County86.3Ulster County: 85.1 %Ulster County85.1Rensselaer County: 84 %Rensselaer County84Madison County: 83.8 %Madison County83.8Saratoga County: 81.9 %Saratoga County81.9Onondaga County: 78.6 %Onondaga County78.6Putnam County: 78 %Putnam County78Kings County: 77.5 %Kings County77.5Nassau County: 77 %Nassau County77Jefferson County: 75.6 %Jefferson County75.6Tompkins County: 75.5 %Tompkins County75.5Oswego County: 73.7 %Oswego County73.7Monroe County: 73.2 %Monroe County73.2Albany County: 70.4 %Albany County70.4St. Lawrence County: 70.3 %St. Lawrence County70.3Suffolk County: 69.9 %Suffolk County69.9Essex County: 69.6 %Essex County69.6Westchester County: 69.5 %Westchester County69.5Niagara County: 67.4 %Niagara County67.4Chautauqua County: 66 %Chautauqua County66Erie County: 57.8 %Erie County57.8Richmond County: 57.8 %Richmond County57.8Steuben County: 56.5 %Steuben County56.5Orange County: 56.4 %Orange County56.4New York County: 46.8 %New York County46.8Queens County: 43 %Queens County43Bronx County: 27.9 %Bronx County27.9Dutchess County: 91.3 %Dutchess County91.3Schenectady County: 91 %Schenectady County91Oneida County: 90.3 %Oneida County90.3Herkimer County: 90.2 %Herkimer County90.2Wayne County: 89.7 %Wayne County89.7Hamilton County: 89.5 %Hamilton County89.5Chemung County: 89.1 %Chemung County89.1Franklin County: 86.3 %Franklin County86.3Ulster County: 85.1 %Ulster County85.1Rensselaer County: 84 %Rensselaer County84Madison County: 83.8 %Madison County83.8Saratoga County: 81.9 %Saratoga County81.9Onondaga County: 78.6 %Onondaga County78.6Putnam County: 78 %Putnam County78Kings County: 77.5 %Kings County77.5Nassau County: 77 %Nassau County77Jefferson County: 75.6 %Jefferson County75.6Tompkins County: 75.5 %Tompkins County75.5Oswego County: 73.7 %Oswego County73.7Monroe County: 73.2 %Monroe County73.2Albany County: 70.4 %Albany County70.4St. Lawrence County: 70.3 %St. Lawrence County70.3Suffolk County: 69.9 %Suffolk County69.9Essex County: 69.6 %Essex County69.6Westchester County: 69.5 %Westchester County69.5Niagara County: 67.4 %Niagara County67.4Chautauqua County: 66 %Chautauqua County66Erie County: 57.8 %Erie County57.8Richmond County: 57.8 %Richmond County57.8Steuben County: 56.5 %Steuben County56.5Orange County: 56.4 %Orange County56.4New York County: 46.8 %New York County46.8Queens County: 43 %Queens County43Bronx County: 27.9 %Bronx County27.9
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12.

Full ranking

RankCounties2005 (%)Change on 2004
1Dutchess County91.3-3.3 pts
2Schenectady County91-4.1 pts
3Oneida County90.3-0.8 pts
4Herkimer County90.2-4 pts
5Wayne County89.7-0.4 pts
6Hamilton County89.5+0.5 pts
7Chemung County89.1-4.4 pts
8Franklin County86.3-13.4 pts
9Ulster County85.1-2.5 pts
10Rensselaer County84-2.8 pts
11Madison County83.8-7.3 pts
12Saratoga County81.9-6.5 pts
13Onondaga County78.6-9.9 pts
14Putnam County78-2.5 pts
15Kings County77.5-3.6 pts
16Nassau County77+0.8 pts
17Jefferson County75.6-8.7 pts
18Tompkins County75.5-6.9 pts
19Oswego County73.7-10.1 pts
20Monroe County73.2-9.6 pts
21Albany County70.4-6.5 pts
22St. Lawrence County70.3-2.5 pts
23Suffolk County69.9-3.6 pts
24Essex County69.6-5.5 pts
25Westchester County69.5-10.8 pts
26Niagara County67.4-8.8 pts
27Chautauqua County66-5.8 pts
28Erie County57.8-6.7 pts
28Richmond County57.8-2 pts
30Steuben County56.5-4.4 pts
31Orange County56.4-10.3 pts
32New York County46.8-14.1 pts
33Queens County43+2.8 pts
34Bronx County27.9+0.6 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 2005 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), 2005) [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), 2005. 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=2005. 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), 2005. 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=2005.

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), 2005 [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=2005 (Accessed: 12 October 2026).

BibTeX
@misc{environmental_counties_in_new_york_2005,
  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), 2005}},
  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=2005. 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), 2005
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=2005
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/good-air-quality-days-share/new-york-counties?period=2005.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in New York by share of days with good air quality (US EPA AQI) using official data, and cite the source.
rank_places {"indicator":"aqi_good_days_share","level":"province","within":"New York","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=aqi_good_days_share&level=province&within=New%20York&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

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

Dutchess County, with 91.3% in 2005, according to EPA.

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

Bronx County, with 27.9% in 2005.

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 2005 and are not ranked.

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

Counties in New York: more rankings