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

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

Share of days with good air quality (US EPA AQI) in Graham County was 98.3% in 2007, according to EPA. That is down 1.7 pts from 2006.

200798.3%
Change on 2006-1.7 pts
Series high1001991
Series low65.61985

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Share of days with good air quality (US EPA AQI) in Graham County, 1985 to 2007

607080901001985198919931997200220071985: 65.6 %1986: 81.5 %1987: 96.2 %1988: 77.4 %1989: 78.2 %1990: 96.2 %1991: 100 %1992: 93.2 %1993: 97.9 %1994: 100 %1995: 90 %1996: 78.4 %1997: 95.6 %1999: 80.6 %2000: 92.9 %2001: 98.3 %2002: 98.3 %2003: 95 %2004: 98.4 %2005: 100 %2006: 100 %2007: 98.3 %607080901001985199320071985: 65.6 %1986: 81.5 %1987: 96.2 %1988: 77.4 %1989: 78.2 %1990: 96.2 %1991: 100 %1992: 93.2 %1993: 97.9 %1994: 100 %1995: 90 %1996: 78.4 %1997: 95.6 %1999: 80.6 %2000: 92.9 %2001: 98.3 %2002: 98.3 %2003: 95 %2004: 98.4 %2005: 100 %2006: 100 %2007: 98.3 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 22 values
Period%
200798.3
2006100
2005100
200498.4
200395
200298.3
200198.3
200092.9
199980.6
199795.6
199678.4
199590
1994100
199397.9
199293.2
1991100
199096.2
198978.2
198877.4
198796.2
198681.5
198565.6

Graham County compared with nearby places

Apache County: 93.2 %Cochise County: 63.3 %Coconino County: 56 %Gila County: 39.9 %Graham County: 98.3 %La Paz County: 52.8 %Maricopa County: 10.1 %Mohave County: 82.5 %Navajo County: 63.7 %Pima County: 45.2 %Pinal County: 10.7 %Santa Cruz County: 45 %Yavapai County: 93.3 %Yuma County: 56.2 %
  • Under 43
  • 43 to 53
  • 53 to 62
  • 62 to 87
  • 87 and over
  • No data
Share of days with good air quality (US EPA AQI), 2007, %. Graham 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), Graham County, 1985 to 2007) [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), Graham County, 1985 to 2007. 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/graham-county-arizona. 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), Graham County, 1985 to 2007. 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/graham-county-arizona.

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), Graham County, 1985 to 2007 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/graham-county-arizona (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_2007,
  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), Graham County, 1985 to 2007}},
  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/graham-county-arizona. 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), Graham County, 1985 to 2007
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/graham-county-arizona
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/graham-county-arizona.
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 Graham County?

Share of days with good air quality (US EPA AQI) in Graham County was 98.3% in 2007, according to EPA. That is down 1.7 pts from 2006.

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 Graham County?

100% in 1991, the highest value since 1985 in this series.

Related statistics for Graham County

All statistics for Graham County | Graham County in figures