Data / Share of days with good air quality (US EPA AQI) / Campbell County

Share of days with good air quality (US EPA AQI) in Campbell County

Share of days with good air quality (US EPA AQI) in Campbell County was 100% in 1994, according to EPA. That is up 1.6 pts from 1993.

1994100%
Change on 1993+1.6 pts
Series high1001989
Series low98.31991

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Share of days with good air quality (US EPA AQI) in Campbell County, 1989 to 1994

9898.59999.51001989199019911992199319941989: 100 %1990: 100 %1991: 98.3 %1992: 100 %1993: 98.4 %1994: 100 %9898.59999.51001989199119941989: 100 %1990: 100 %1991: 98.3 %1992: 100 %1993: 98.4 %1994: 100 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 6 values
Period%
1994100
199398.4
1992100
199198.3
1990100
1989100

Campbell County compared with nearby places

Arlington County: 63 %Augusta County: 58.9 %Campbell County: 100 %Caroline County: 70.8 %Carroll County: 100 %Charles City County: 68.7 %Chesterfield County: 62.6 %Culpeper County: 100 %Fairfax County: 51.5 %Fauquier County: 60.6 %Frederick County: 61.2 %Giles County: 62.8 %Hanover County: 50.5 %Henrico County: 58.1 %Henry County: 74.6 %Isle of Wight County: 100 %King William County: 100 %Loudoun County: 100 %Madison County: 59.5 %Northumberland County: 100 %Prince Edward County: 71.5 %Prince William County: 76.3 %Roanoke County: 72.9 %Rockbridge County: 11.4 %Smyth County: 100 %Stafford County: 59 %Warren County: 56.4 %Wise County: 96.7 %Wythe County: 60.6 %York County: 100 %Alexandria city: 62.1 %Bristol city: 100 %Charlottesville city: 100 %Chesapeake city: 100 %Covington city: 100 %Fredericksburg city: 100 %Hampton city: 62.9 %Lynchburg city: 100 %Martinsville city: 98.3 %Newport News city: 100 %Norfolk city: 87.7 %Richmond city: 80.3 %Roanoke city: 95.1 %Suffolk city: 58.2 %Winchester city: 98.3 %
  • Under 59
  • 59 to 63
  • 63 to 76
  • 76 to 100
  • 100 and over
  • No data
Share of days with good air quality (US EPA AQI), 1994, %. Campbell 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

Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.

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: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts (Share of days with good air quality (US EPA AQI), Campbell County, 1989 to 1994) [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: good days as a share of days with an AQI, calculated with stored counts, Share of days with good air quality (US EPA AQI), Campbell County, 1989 to 1994. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/good-air-quality-days-share/campbell-county-virginia. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Share of days with good air quality (US EPA AQI), Campbell County, 1989 to 1994. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/good-air-quality-days-share/campbell-county-virginia.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts, Share of days with good air quality (US EPA AQI), Campbell County, 1989 to 1994 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/campbell-county-virginia (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_1994,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts: Share of days with good air quality (US EPA AQI), Campbell County, 1989 to 1994}},
  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/good-air-quality-days-share/campbell-county-virginia. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts: Share of days with good air quality (US EPA AQI), Campbell County, 1989 to 1994
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/good-air-quality-days-share/campbell-county-virginia
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/campbell-county-virginia.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Questions

What is the share of days with good air quality (US EPA AQI) in Campbell County?

Share of days with good air quality (US EPA AQI) in Campbell County was 100% in 1994, according to EPA. That is up 1.6 pts from 1993.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Retrieved by Invokely on 2026-10-12.

What was the highest share of days with good air quality (US EPA AQI) in Campbell County?

100% in 1989, the highest value since 1989 in this series.

Related statistics for Campbell County

All statistics for Campbell County | Campbell County in figures