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

Median Air Quality Index (US EPA) in Jackson County

Median Air Quality Index (US EPA) in Jackson County was 20 in 2010, according to the U.S. Environmental Protection Agency. That is up 6 from 2009.

2010, index20
Change on 2009+6
Series high241989
Series low142009

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 Jackson County, 1989 to 2010

1416182022241989199319972001200520101989: 24 index1990: 22 index1991: 23 index1992: 24 index1993: 17 index1994: 19 index1995: 18 index1996: 17 index1997: 19 index1998: 20 index1999: 20 index2000: 19 index2001: 17 index2002: 16 index2003: 17 index2004: 18 index2005: 22 index2006: 19 index2007: 20 index2008: 16 index2009: 14 index2010: 20 index12.51517.52022.5251989199720101989: 24 index1990: 22 index1991: 23 index1992: 24 index1993: 17 index1994: 19 index1995: 18 index1996: 17 index1997: 19 index1998: 20 index1999: 20 index2000: 19 index2001: 17 index2002: 16 index2003: 17 index2004: 18 index2005: 22 index2006: 19 index2007: 20 index2008: 16 index2009: 14 index2010: 20 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 22 values
Periodindex
201020
200914
200816
200720
200619
200522
200418
200317
200216
200117
200019
199920
199820
199719
199617
199518
199419
199317
199224
199123
199022
198924

Jackson County compared with nearby places

Adams County: 37 indexChampaign County: 35 indexClark County: 40 indexCook County: 62 indexDuPage County: 54 indexEffingham County: 44 indexHamilton County: 47 indexJackson County: 20 indexJersey County: 38 indexJo Daviess County: 37 indexKane County: 37 indexLake County: 38 indexLaSalle County: 42 indexMcHenry County: 44 indexMcLean County: 41 indexMacon County: 52 indexMacoupin County: 37 indexMadison County: 64 indexPeoria County: 56 indexRandolph County: 36 indexRock Island County: 33 indexSt. Clair County: 52 indexSangamon County: 40 indexWill County: 38 indexWinnebago County: 37 index
  • Under 37
  • 37 to 38
  • 38 to 41
  • 41 to 52
  • 52 and over
  • No data
Median Air Quality Index (US EPA), 2010, index. Jackson 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), Jackson County, 1989 to 2010) [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), Jackson County, 1989 to 2010. 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/jackson-county-illinois. 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), Jackson County, 1989 to 2010. 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/jackson-county-illinois.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Jackson County, 1989 to 2010 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/jackson-county-illinois (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2010,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Jackson County, 1989 to 2010}},
  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/jackson-county-illinois. 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), Jackson County, 1989 to 2010
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/jackson-county-illinois
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/jackson-county-illinois.
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 Jackson County?

Median Air Quality Index (US EPA) in Jackson County was 20 in 2010, according to the U.S. Environmental Protection Agency. That is up 6 from 2009.

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 Jackson County?

24 in 1989, the highest value since 1989 in this series.

Related statistics for Jackson County

All statistics for Jackson County | Jackson County in figures