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

Median Air Quality Index (US EPA) in Stark County

Median Air Quality Index (US EPA) in Stark County was 27 in 2001, according to the U.S. Environmental Protection Agency. That is down 1 from 2000. That is the 10th highest of 12 counties in 2001.

2001, index27
Change on 2000-1
Rank10th of 12Counties in North Dakota ranked
Series high282000
Series low61996

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 Stark County, 1985 to 2001

51015202530198519891992199520011985: 25 index1986: 24 index1987: 19 index1989: 19 index1990: 14 index1991: 12 index1992: 10 index1993: 10 index1994: 9 index1995: 9 index1996: 6 index1997: 9 index1998: 10 index2000: 28 index2001: 27 index010203019851991199620011985: 25 index1986: 24 index1987: 19 index1989: 19 index1990: 14 index1991: 12 index1992: 10 index1993: 10 index1994: 9 index1995: 9 index1996: 6 index1997: 9 index1998: 10 index2000: 28 index2001: 27 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 15 values
Periodindex
200127
200028
199810
19979
19966
19959
19949
199310
199210
199112
199014
198919
198719
198624
198525

Stark County compared with nearby places

Billings County: 36 indexBurke County: 8 indexBurleigh County: 37 indexCass County: 37 indexDunn County: 35 indexGrand Forks County: 39 indexMcKenzie County: 28 indexMcLean County: 11 indexMercer County: 33 indexOliver County: 34 indexStark County: 27 indexSteele County: 31 index
  • Under 27
  • 27 to 32
  • 32 to 35
  • 35 to 37
  • 37 and over
  • No data
Median Air Quality Index (US EPA), 2001, index. Stark 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), Stark County, 1985 to 2001) [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), Stark County, 1985 to 2001. 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/stark-county-north-dakota. 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), Stark County, 1985 to 2001. 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/stark-county-north-dakota.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Stark County, 1985 to 2001 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/stark-county-north-dakota (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2001,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Stark County, 1985 to 2001}},
  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/stark-county-north-dakota. 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), Stark County, 1985 to 2001
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/stark-county-north-dakota
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/stark-county-north-dakota.
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 Stark County?

Median Air Quality Index (US EPA) in Stark County was 27 in 2001, according to the U.S. Environmental Protection Agency. That is down 1 from 2000. That is the 10th highest of 12 counties in 2001.

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 Stark County?

28 in 2000, the highest value since 1985 in this series.

Related statistics for Stark County

All statistics for Stark County | Stark County in figures