Data / Highest daily Air Quality Index (US EPA) / Covington city

Highest daily Air Quality Index (US EPA) in Covington city

Highest daily Air Quality Index (US EPA) in Covington city was 51 in 1998, according to the U.S. Environmental Protection Agency. That is down 2 from 1997.

1998, index51
Change on 1997-2
Series high1031991
Series low451994

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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Highest daily Air Quality Index (US EPA) in Covington city, 1989 to 1998

406080100120198919911993199519981989: 52 index1990: 59 index1991: 103 index1992: 52 index1993: 63 index1994: 45 index1995: 48 index1996: 54 index1997: 53 index1998: 51 index4060801001201989199319981989: 52 index1990: 59 index1991: 103 index1992: 52 index1993: 63 index1994: 45 index1995: 48 index1996: 54 index1997: 53 index1998: 51 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 10 values
Periodindex
199851
199753
199654
199548
199445
199363
199252
1991103
199059
198952

Covington city compared with nearby places

Arlington County: 185 indexCaroline County: 210 indexCarroll County: 43 indexCharles City County: 217 indexChesterfield County: 202 indexCulpeper County: 48 indexFairfax County: 213 indexFauquier County: 197 indexFrederick County: 201 indexGiles County: 190 indexHanover County: 209 indexHenrico County: 210 indexKing William County: 48 indexLoudoun County: 202 indexMadison County: 205 indexNorthumberland County: 47 indexPrince Edward County: 190 indexPrince William County: 208 indexRoanoke County: 206 indexRockbridge County: 104 indexRockingham County: 56 indexStafford County: 206 indexTazewell County: 36 indexWarren County: 45 indexWise County: 40 indexWythe County: 177 indexAlexandria city: 190 indexBristol city: 39 indexCharlottesville city: 51 indexChesapeake city: 51 indexCovington city: 51 indexFredericksburg city: 48 indexHampton city: 179 indexLynchburg city: 35 indexMartinsville city: 43 indexNewport News city: 35 indexNorfolk city: 100 indexRichmond city: 85 indexRoanoke city: 61 indexSuffolk city: 182 indexWinchester city: 48 index
  • Under 44
  • 44 to 51
  • 51 to 100
  • 100 to 190
  • 190 to 210
  • 210 and over
  • No data
Highest daily Air Quality Index (US EPA), 1998, index. Covington city 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

Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.

A single day decides the value, so one wildfire or dust event can set it. Dust from the dry Owens Lake bed puts Inyo and Mono counties in California in the thousands. 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: highest 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: highest daily AQI (Highest daily Air Quality Index (US EPA), Covington city, 1989 to 1998) [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: highest daily AQI, Highest daily Air Quality Index (US EPA), Covington city, 1989 to 1998. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/highest-daily-air-quality-index/covington-city-virginia. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: highest daily AQI. Highest daily Air Quality Index (US EPA), Covington city, 1989 to 1998. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/highest-daily-air-quality-index/covington-city-virginia.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Covington city, 1989 to 1998 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/covington-city-virginia (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_1998,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Covington city, 1989 to 1998}},
  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/highest-daily-air-quality-index/covington-city-virginia. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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: highest daily AQI: Highest daily Air Quality Index (US EPA), Covington city, 1989 to 1998
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/highest-daily-air-quality-index/covington-city-virginia
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/covington-city-virginia.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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 highest daily Air Quality Index (US EPA) in Covington city?

Highest daily Air Quality Index (US EPA) in Covington city was 51 in 1998, according to the U.S. Environmental Protection Agency. That is down 2 from 1997.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: highest daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest highest daily Air Quality Index (US EPA) in Covington city?

103 in 1991, the highest value since 1989 in this series.

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