Data / Highest daily Air Quality Index (US EPA) / Gibson County

Highest daily Air Quality Index (US EPA) in Gibson County

Highest daily Air Quality Index (US EPA) in Gibson County was 88 in 2011, according to the U.S. Environmental Protection Agency. That is up 2 from 2010.

2011, index88
Change on 2010+2
Series high1611999
Series low852008

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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Highest daily Air Quality Index (US EPA) in Gibson County, 1999 to 2011

80100120140160180199920012003200820111999: 161 index2000: 112 index2001: 112 index2002: 143 index2003: 161 index2004: 140 index2008: 85 index2009: 85 index2010: 86 index2011: 88 index801001201401601801999200320111999: 161 index2000: 112 index2001: 112 index2002: 143 index2003: 161 index2004: 140 index2008: 85 index2009: 85 index2010: 86 index2011: 88 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 10 values
Periodindex
201188
201086
200985
200885
2004140
2003161
2002143
2001112
2000112
1999161

Gibson County compared with nearby places

Allen County: 122 indexBoone County: 159 indexCarroll County: 122 indexClark County: 161 indexDelaware County: 112 indexDubois County: 109 indexElkhart County: 147 indexFloyd County: 174 indexGibson County: 88 indexGreene County: 159 indexHamilton County: 150 indexHancock County: 108 indexHendricks County: 105 indexHenry County: 93 indexHoward County: 85 indexHuntington County: 115 indexJackson County: 100 indexJohnson County: 100 indexKnox County: 154 indexLake County: 158 indexLaPorte County: 174 indexMadison County: 112 indexMarion County: 141 indexMonroe County: 99 indexMorgan County: 112 indexPerry County: 133 indexPorter County: 158 indexPosey County: 129 indexSt. Joseph County: 161 indexShelby County: 143 indexSpencer County: 93 indexTippecanoe County: 105 indexVanderburgh County: 150 indexVigo County: 127 indexWabash County: 129 indexWarrick County: 159 indexWhitley County: 89 index
  • Under 100
  • 100 to 110
  • 110 to 130
  • 130 to 150
  • 150 to 160
  • 160 and over
  • No data
Highest daily Air Quality Index (US EPA), 2011, index. Gibson 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

Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.

A single day decides the value, so one wildfire or dust event can set it. Dust from the dry Owens Lake bed puts Inyo and Mono counties in California in the thousands. 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: highest 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: highest daily AQI (Highest daily Air Quality Index (US EPA), Gibson County, 1999 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: highest daily AQI, Highest daily Air Quality Index (US EPA), Gibson County, 1999 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/highest-daily-air-quality-index/gibson-county-indiana. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: highest daily AQI. Highest daily Air Quality Index (US EPA), Gibson County, 1999 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/highest-daily-air-quality-index/gibson-county-indiana.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Gibson County, 1999 to 2011 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/gibson-county-indiana (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2011,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Gibson County, 1999 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/highest-daily-air-quality-index/gibson-county-indiana. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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: highest daily AQI: Highest daily Air Quality Index (US EPA), Gibson County, 1999 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/highest-daily-air-quality-index/gibson-county-indiana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/gibson-county-indiana.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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 highest daily Air Quality Index (US EPA) in Gibson County?

Highest daily Air Quality Index (US EPA) in Gibson County was 88 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: highest daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest highest daily Air Quality Index (US EPA) in Gibson County?

161 in 1999, the highest value since 1999 in this series.

Related statistics for Gibson County

All statistics for Gibson County | Gibson County in figures