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

Median Air Quality Index (US EPA) in Harrison County

Median Air Quality Index (US EPA) in Harrison County was 33 in 2022, according to the U.S. Environmental Protection Agency. That is up 28 from 2021.

2022, index33
Change on 2021+28
Series high332022
Series low12020

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 Harrison County, 2018 to 2022

010203040201820192020202120222018: 3 index2019: 2 index2020: 1 index2021: 5 index2022: 33 index0102030402018202020222018: 3 index2019: 2 index2020: 1 index2021: 5 index2022: 33 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 5 values
Periodindex
202233
20215
20201
20192
20183

Harrison County compared with nearby places

Allen County: 41 indexAshtabula County: 38 indexAthens County: 27 indexBelmont County: 15 indexButler County: 53 indexClark County: 46 indexClermont County: 44 indexClinton County: 40 indexColumbiana County: 12 indexCuyahoga County: 54 indexDelaware County: 37 indexFayette County: 35 indexFranklin County: 48 indexGeauga County: 40 indexGreene County: 40 indexHamilton County: 54 indexHarrison County: 33 indexJefferson County: 53 indexKnox County: 39 indexLake County: 41 indexLawrence County: 45 indexLicking County: 39 indexLorain County: 35 indexLucas County: 44 indexMadison County: 39 indexMahoning County: 46 indexMedina County: 41 indexMiami County: 39 indexMontgomery County: 48 indexNoble County: 37 indexPortage County: 41 indexPreble County: 44 indexScioto County: 17 indexStark County: 49 indexSummit County: 43 indexTrumbull County: 42 indexWarren County: 44 indexWashington County: 39 indexWood County: 38 index
  • Under 36
  • 36 to 39
  • 39 to 41
  • 41 to 44
  • 44 to 47
  • 47 and over
  • No data
Median Air Quality Index (US EPA), 2022, index. Harrison 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), Harrison County, 2018 to 2022) [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), Harrison County, 2018 to 2022. 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/harrison-county-ohio. 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), Harrison County, 2018 to 2022. 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/harrison-county-ohio.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Harrison County, 2018 to 2022 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/harrison-county-ohio (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2022,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Harrison County, 2018 to 2022}},
  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/harrison-county-ohio. 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), Harrison County, 2018 to 2022
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/harrison-county-ohio
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/harrison-county-ohio.
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 Harrison County?

Median Air Quality Index (US EPA) in Harrison County was 33 in 2022, according to the U.S. Environmental Protection Agency. That is up 28 from 2021.

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 Harrison County?

33 in 2022, the highest value since 2018 in this series.

Related statistics for Harrison County

All statistics for Harrison County | Harrison County in figures