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

Median Air Quality Index (US EPA) in Buchanan County

Median Air Quality Index (US EPA) in Buchanan County was 19 in 1992, according to the U.S. Environmental Protection Agency. That is down 9 from 1991.

1992, index19
Change on 1991-9
Series high341988
Series low191992

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 Buchanan County, 1988 to 1992

1520253035198819891990199119921988: 34 index1989: 29 index1990: 30 index1991: 28 index1992: 19 index15202530351988199019921988: 34 index1989: 29 index1990: 30 index1991: 28 index1992: 19 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
199219
199128
199030
198929
198834

Buchanan County compared with nearby places

Amherst County: 46 indexArlington County: 42 indexAugusta County: 33 indexBuchanan County: 19 indexCampbell County: 19 indexCarroll County: 21 indexCharles City County: 45 indexChesterfield County: 44 indexCulpeper County: 19 indexFairfax County: 52 indexFauquier County: 45 indexFrederick County: 44 indexGiles County: 42 indexHanover County: 47 indexHenrico County: 42 indexKing William County: 15 indexLoudoun County: 17 indexMadison County: 44 indexNorthumberland County: 18 indexPrince Edward County: 38 indexPrince William County: 38 indexRoanoke County: 37 indexSmyth County: 19 indexStafford County: 35 indexWarren County: 37 indexWythe County: 45 indexYork County: 18 indexAlexandria city: 43 indexBristol city: 21 indexCharlottesville city: 19 indexChesapeake city: 19 indexCovington city: 22 indexFairfax city: 33 indexFredericksburg city: 18 indexHampton city: 42 indexLynchburg city: 20 indexMartinsville city: 19 indexNewport News city: 11 indexNorfolk city: 36 indexRichmond city: 37 indexRoanoke city: 32 indexSuffolk city: 46 indexWinchester city: 20 index
  • Under 19
  • 19 to 20
  • 20 to 35
  • 35 to 42
  • 42 to 44
  • 44 and over
  • No data
Median Air Quality Index (US EPA), 1992, index. Buchanan 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), Buchanan County, 1988 to 1992) [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), Buchanan County, 1988 to 1992. 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/buchanan-county-virginia. 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), Buchanan County, 1988 to 1992. 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/buchanan-county-virginia.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Buchanan County, 1988 to 1992 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/buchanan-county-virginia (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_1992,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Buchanan County, 1988 to 1992}},
  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/buchanan-county-virginia. 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), Buchanan County, 1988 to 1992
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/buchanan-county-virginia
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/buchanan-county-virginia.
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 Buchanan County?

Median Air Quality Index (US EPA) in Buchanan County was 19 in 1992, according to the U.S. Environmental Protection Agency. That is down 9 from 1991.

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 Buchanan County?

34 in 1988, the highest value since 1988 in this series.

Related statistics for Buchanan County

All statistics for Buchanan County | Buchanan County in figures