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

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

Highest daily Air Quality Index (US EPA) in Ohio County was 85 in 2010, according to the U.S. Environmental Protection Agency. That is down 21 from 2009.

2010, index85
Change on 2009-21
Series high2071983
Series low852010

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 Ohio County, 1980 to 2010

75100125150175200225198019822005200720101980: 164 index1981: 129 index1982: 112 index1983: 207 index2005: 122 index2006: 100 index2007: 127 index2008: 89 index2009: 106 index2010: 85 index501001502002501980200520101980: 164 index1981: 129 index1982: 112 index1983: 207 index2005: 122 index2006: 100 index2007: 127 index2008: 89 index2009: 106 index2010: 85 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
201085
2009106
200889
2007127
2006100
2005122
1983207
1982112
1981129
1980164

Ohio County compared with nearby places

Bell County: 115 indexBoone County: 136 indexBoyd County: 119 indexBullitt County: 119 indexCampbell County: 133 indexCarter County: 115 indexChristian County: 122 indexDaviess County: 133 indexEdmonson County: 126 indexFayette County: 115 indexFranklin County: 83 indexGreenup County: 122 indexHancock County: 122 indexHardin County: 115 indexHenderson County: 122 indexJefferson County: 177 indexJessamine County: 108 indexKenton County: 115 indexLivingston County: 108 indexMcCracken County: 122 indexMadison County: 85 indexMarshall County: 31 indexMorgan County: 133 indexOhio County: 85 indexOldham County: 161 indexPerry County: 115 indexPike County: 105 indexPulaski County: 100 indexSimpson County: 112 indexTrigg County: 147 indexWarren County: 105 indexWashington County: 126 index
  • Under 110
  • 110 to 120
  • 120 to 130
  • 130 and over
  • No data
Highest daily Air Quality Index (US EPA), 2010, index. Ohio 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), Ohio County, 1980 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: highest daily AQI, Highest daily Air Quality Index (US EPA), Ohio County, 1980 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/highest-daily-air-quality-index/ohio-county-kentucky. 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), Ohio County, 1980 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/highest-daily-air-quality-index/ohio-county-kentucky.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Ohio County, 1980 to 2010 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/ohio-county-kentucky (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2010,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Ohio County, 1980 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/highest-daily-air-quality-index/ohio-county-kentucky. 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), Ohio County, 1980 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/highest-daily-air-quality-index/ohio-county-kentucky
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/ohio-county-kentucky.
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 Ohio County?

Highest daily Air Quality Index (US EPA) in Ohio County was 85 in 2010, according to the U.S. Environmental Protection Agency. That is down 21 from 2009.

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 Ohio County?

207 in 1983, the highest value since 1980 in this series.

Related statistics for Ohio County

All statistics for Ohio County | Ohio County in figures