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

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

Share of days with good air quality (US EPA AQI) in Halifax County was 96.6% in 1997, according to EPA. That is down 1.3 pts from 1996.

199796.6%
Change on 1996-1.3 pts
Series high1001992
Series low96.61997

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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Share of days with good air quality (US EPA AQI) in Halifax County, 1992 to 1997

969798991001992199319941995199619971992: 100 %1993: 100 %1994: 100 %1995: 100 %1996: 97.9 %1997: 96.6 %969798991001992199419971992: 100 %1993: 100 %1994: 100 %1995: 100 %1996: 97.9 %1997: 96.6 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 6 values
Period%
199796.6
199697.9
1995100
1994100
1993100
1992100

Halifax County compared with nearby places

Alamance County: 96.7 %Alexander County: 55.7 %Avery County: 65.5 %Beaufort County: 100 %Buncombe County: 80 %Cabarrus County: 100 %Caldwell County: 52.8 %Camden County: 55.1 %Carteret County: 71.7 %Caswell County: 36.2 %Catawba County: 98.4 %Chatham County: 45.8 %Cumberland County: 63.6 %Davidson County: 96.7 %Davie County: 41.6 %Duplin County: 76.5 %Durham County: 72.9 %Edgecombe County: 55.5 %Forsyth County: 60.8 %Franklin County: 40.2 %Gaston County: 99.5 %Granville County: 45.8 %Guilford County: 70.4 %Halifax County: 96.6 %Harnett County: 100 %Haywood County: 44.3 %Henderson County: 100 %Johnston County: 41.8 %Lincoln County: 54.6 %McDowell County: 98.4 %Macon County: 82 %Martin County: 59.8 %Mecklenburg County: 60.3 %Mitchell County: 96.4 %Montgomery County: 57.2 %New Hanover County: 61.6 %Northampton County: 53.1 %Onslow County: 100 %Orange County: 95.1 %Pasquotank County: 100 %Person County: 48.5 %Pitt County: 53.3 %Robeson County: 98.2 %Rockingham County: 38.3 %Rowan County: 46.9 %Swain County: 77.4 %Wake County: 54.8 %Watauga County: 100 %Wayne County: 100 %Wilson County: 97.8 %Yancey County: 67.6 %
  • Under 47
  • 47 to 56
  • 56 to 68
  • 68 to 96
  • 96 to 99
  • 99 and over
  • No data
Share of days with good air quality (US EPA AQI), 1997, %. Halifax 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), Halifax County, 1992 to 1997) [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), Halifax County, 1992 to 1997. 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/halifax-county-north-carolina. 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), Halifax County, 1992 to 1997. 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/halifax-county-north-carolina.

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), Halifax County, 1992 to 1997 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/halifax-county-north-carolina (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_1997,
  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), Halifax County, 1992 to 1997}},
  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/halifax-county-north-carolina. 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), Halifax County, 1992 to 1997
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/halifax-county-north-carolina
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/halifax-county-north-carolina.
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 Halifax County?

Share of days with good air quality (US EPA AQI) in Halifax County was 96.6% in 1997, according to EPA. That is down 1.3 pts from 1996.

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 Halifax County?

100% in 1992, the highest value since 1992 in this series.

Related statistics for Halifax County

All statistics for Halifax County | Halifax County in figures