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

Median Air Quality Index (US EPA) in Stoddard County

Median Air Quality Index (US EPA) in Stoddard County was 21 in 2025, according to the U.S. Environmental Protection Agency. That is down 8 from 2024. That is the 21st highest of 21 counties in 2025.

2025, index21
Change on 2024-8
Rank21st of 21Counties in Missouri ranked
Series high592000
Series low212025

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 Stoddard County, 2000 to 2025

203040506020002004200820122016202020252000: 59 index2001: 53 index2002: 55 index2003: 56 index2004: 45 index2005: 56 index2006: 50 index2007: 54 index2008: 49 index2009: 42 index2010: 49 index2011: 47 index2012: 41 index2013: 44 index2014: 41 index2015: 37 index2016: 32 index2017: 32 index2018: 32 index2019: 31 index2020: 26 index2021: 30 index2022: 31 index2023: 37 index2024: 29 index2025: 21 index203040506020002009201820252000: 59 index2001: 53 index2002: 55 index2003: 56 index2004: 45 index2005: 56 index2006: 50 index2007: 54 index2008: 49 index2009: 42 index2010: 49 index2011: 47 index2012: 41 index2013: 44 index2014: 41 index2015: 37 index2016: 32 index2017: 32 index2018: 32 index2019: 31 index2020: 26 index2021: 30 index2022: 31 index2023: 37 index2024: 29 index2025: 21 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 26 values
Periodindex
202521
202429
202337
202231
202130
202026
201931
201832
201732
201632
201537
201441
201344
201241
201147
201049
200942
200849
200754
200650
200556
200445
200356
200255
200153
200059

Stoddard County compared with nearby places

Andrew County: 40 indexBoone County: 37 indexBuchanan County: 46 indexCallaway County: 41 indexCass County: 41 indexCedar County: 39 indexClay County: 42 indexClinton County: 41 indexGreene County: 45 indexJackson County: 47 indexJasper County: 38 indexJefferson County: 42 indexLincoln County: 41 indexMonroe County: 35 indexPerry County: 41 indexSt. Charles County: 40 indexSte. Genevieve County: 41 indexSt. Louis County: 43 indexStoddard County: 21 indexTaney County: 28 indexSt. Louis city: 55 index
  • Under 38
  • 38 to 41
  • 41 to 43
  • 43 and over
  • No data
Median Air Quality Index (US EPA), 2025, index. Stoddard 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), Stoddard County, 2000 to 2025) [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), Stoddard County, 2000 to 2025. 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/stoddard-county-missouri. 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), Stoddard County, 2000 to 2025. 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/stoddard-county-missouri.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Stoddard County, 2000 to 2025 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/stoddard-county-missouri (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2025,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Stoddard County, 2000 to 2025}},
  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/stoddard-county-missouri. 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), Stoddard County, 2000 to 2025
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/stoddard-county-missouri
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/stoddard-county-missouri.
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 Stoddard County?

Median Air Quality Index (US EPA) in Stoddard County was 21 in 2025, according to the U.S. Environmental Protection Agency. That is down 8 from 2024. That is the 21st highest of 21 counties in 2025.

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 Stoddard County?

59 in 2000, the highest value since 2000 in this series.

Related statistics for Stoddard County

All statistics for Stoddard County | Stoddard County in figures