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

Median Air Quality Index (US EPA) in Monroe County

Median Air Quality Index (US EPA) in Monroe County was 14 in 2004, according to the U.S. Environmental Protection Agency. That is down 6 from 2003.

2004, index14
Change on 2003-6
Series high271993
Series low142004

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 Monroe County, 1993 to 2004

10152025301993199519971999200120041993: 27 index1994: 25 index1995: 22 index1996: 25 index1997: 21 index1998: 17 index1999: 22 index2000: 21 index2001: 24 index2002: 23 index2003: 20 index2004: 14 index101520253019931997200120041993: 27 index1994: 25 index1995: 22 index1996: 25 index1997: 21 index1998: 17 index1999: 22 index2000: 21 index2001: 24 index2002: 23 index2003: 20 index2004: 14 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 12 values
Periodindex
200414
200320
200223
200124
200021
199922
199817
199721
199625
199522
199425
199327

Monroe County compared with nearby places

Allen County: 41 indexAshtabula County: 42 indexAthens County: 53 indexBelmont County: 16 indexButler County: 45 indexClark County: 52 indexClermont County: 42 indexClinton County: 45 indexColumbiana County: 24 indexCrawford County: 34 indexCuyahoga County: 64 indexDelaware County: 44 indexFayette County: 35 indexFranklin County: 62 indexGallia County: 60 indexGeauga County: 43 indexGreene County: 47 indexHamilton County: 63 indexHancock County: 23 indexJefferson County: 42 indexKnox County: 43 indexLake County: 38 indexLawrence County: 44 indexLicking County: 43 indexLorain County: 46 indexLucas County: 43 indexMadison County: 44 indexMahoning County: 59 indexMedina County: 42 indexMiami County: 44 indexMonroe County: 14 indexMontgomery County: 39 indexNoble County: 39 indexPortage County: 48 indexPreble County: 47 indexScioto County: 54 indexSeneca County: 16 indexStark County: 42 indexSummit County: 59 indexTrumbull County: 57 indexWarren County: 46 indexWashington County: 43 indexWood County: 42 indexWyandot County: 22 index
  • Under 36
  • 36 to 42
  • 42 to 43
  • 43 to 46
  • 46 to 54
  • 54 and over
  • No data
Median Air Quality Index (US EPA), 2004, index. Monroe 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), Monroe County, 1993 to 2004) [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), Monroe County, 1993 to 2004. 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/monroe-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), Monroe County, 1993 to 2004. 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/monroe-county-ohio.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Monroe County, 1993 to 2004 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/monroe-county-ohio (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2004,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Monroe County, 1993 to 2004}},
  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/monroe-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), Monroe County, 1993 to 2004
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/monroe-county-ohio
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/monroe-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 Monroe County?

Median Air Quality Index (US EPA) in Monroe County was 14 in 2004, according to the U.S. Environmental Protection Agency. That is down 6 from 2003.

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 Monroe County?

27 in 1993, the highest value since 1993 in this series.

Related statistics for Monroe County

All statistics for Monroe County | Monroe County in figures