Data / Median Air Quality Index (US EPA) / Oneida County

Median Air Quality Index (US EPA) in Oneida County

Median Air Quality Index (US EPA) in Oneida County was 38 in 2011, according to the U.S. Environmental Protection Agency. That is up 2 from 2010.

2011, index38
Change on 2010+2
Series high422003
Series low311994

Next release: Tuesday, 13 July 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

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Median Air Quality Index (US EPA) in Oneida County, 1989 to 2011

3032.53537.54042.519891996199920022005200820111989: 38 index1994: 31 index1995: 35 index1996: 37 index1997: 36 index1998: 39 index1999: 39 index2000: 36 index2001: 40 index2002: 37 index2003: 42 index2004: 38 index2005: 41 index2006: 38 index2007: 37 index2008: 39 index2009: 36 index2010: 36 index2011: 38 index303540451989200020111989: 38 index1994: 31 index1995: 35 index1996: 37 index1997: 36 index1998: 39 index1999: 39 index2000: 36 index2001: 40 index2002: 37 index2003: 42 index2004: 38 index2005: 41 index2006: 38 index2007: 37 index2008: 39 index2009: 36 index2010: 36 index2011: 38 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 19 values
Periodindex
201138
201036
200936
200839
200737
200638
200541
200438
200342
200237
200140
200036
199939
199839
199736
199637
199535
199431
198938

Oneida County compared with nearby places

Ashland County: 33 indexBarron County: 14 indexBrown County: 55 indexChippewa County: 7 indexColumbia County: 40 indexDane County: 50 indexDodge County: 47 indexDoor County: 36 indexEau Claire County: 39 indexFond du Lac County: 40 indexForest County: 37 indexGrant County: 48 indexJefferson County: 40 indexKenosha County: 44 indexKewaunee County: 38 indexLa Crosse County: 44 indexManitowoc County: 37 indexMarathon County: 39 indexMilwaukee County: 52 indexOneida County: 38 indexOutagamie County: 42 indexOzaukee County: 40 indexRacine County: 40 indexRock County: 41 indexSauk County: 40 indexSheboygan County: 41 indexTaylor County: 36 indexVilas County: 36 indexWalworth County: 41 indexWaukesha County: 44 index
  • Under 36
  • 36 to 39
  • 39 to 40
  • 40 to 41
  • 41 to 45
  • 45 and over
  • No data
Median Air Quality Index (US EPA), 2011, index. Oneida County is outlined. Same source and period for every area shown. Source: U.S. Environmental Protection Agency. Boundaries: U.S. Census Bureau cartographic boundary files.

Rankings

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.

More on how it is measured
  • 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.

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.

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How to cite

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.

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: median daily AQI (Median Air Quality Index (US EPA), Oneida County, 1989 to 2011) [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: median daily AQI, Median Air Quality Index (US EPA), Oneida County, 1989 to 2011. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/median-air-quality-index/oneida-county-wisconsin. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: median daily AQI. Median Air Quality Index (US EPA), Oneida County, 1989 to 2011. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/median-air-quality-index/oneida-county-wisconsin.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Oneida County, 1989 to 2011 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/oneida-county-wisconsin (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2011,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Oneida County, 1989 to 2011}},
  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/en/median-air-quality-index/oneida-county-wisconsin. Publisher attribution: 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.},
}
RIS
TY  - DATA
AU  - U.S. Environmental Protection Agency
TI  - EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Oneida County, 1989 to 2011
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/en/median-air-quality-index/oneida-county-wisconsin
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/oneida-county-wisconsin.
N1  - Publisher attribution: 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.
ER  -
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Questions

What is the median Air Quality Index (US EPA) in Oneida County?

Median Air Quality Index (US EPA) in Oneida County was 38 in 2011, according to the U.S. Environmental Protection Agency. That is up 2 from 2010.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: median daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest median Air Quality Index (US EPA) in Oneida County?

42 in 2003, the highest value since 1989 in this series.

Related statistics for Oneida County

All statistics for Oneida County | Oneida County in figures