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

Median Air Quality Index (US EPA) in Gila County

Median Air Quality Index (US EPA) in Gila County was 47 in 2025, according to the U.S. Environmental Protection Agency. That is down 3 from 2024. That is the 6th highest of 13 counties in 2025.

2025, index47
Change on 2024-3
Rank6th of 13Counties in Arizona ranked
Series high682003
Series low271991

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 Gila County, 1985 to 2025

20304050607019851991199720032009201520251985: 54 index1986: 54 index1987: 38 index1988: 34 index1989: 34 index1990: 30 index1991: 27 index1992: 27 index1993: 28 index1994: 27 index1995: 28 index1996: 29 index1997: 38 index1998: 36 index1999: 52 index2000: 42 index2001: 37 index2002: 61 index2003: 68 index2004: 51 index2005: 58 index2006: 51 index2007: 56 index2008: 51 index2009: 48 index2010: 44 index2011: 48 index2012: 54 index2013: 49 index2014: 45 index2015: 43 index2016: 44 index2017: 44 index2018: 47 index2019: 48 index2020: 44 index2021: 46 index2022: 45 index2023: 46 index2024: 50 index2025: 47 index2040608019851999201320251985: 54 index1986: 54 index1987: 38 index1988: 34 index1989: 34 index1990: 30 index1991: 27 index1992: 27 index1993: 28 index1994: 27 index1995: 28 index1996: 29 index1997: 38 index1998: 36 index1999: 52 index2000: 42 index2001: 37 index2002: 61 index2003: 68 index2004: 51 index2005: 58 index2006: 51 index2007: 56 index2008: 51 index2009: 48 index2010: 44 index2011: 48 index2012: 54 index2013: 49 index2014: 45 index2015: 43 index2016: 44 index2017: 44 index2018: 47 index2019: 48 index2020: 44 index2021: 46 index2022: 45 index2023: 46 index2024: 50 index2025: 47 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 41 values
Periodindex
202547
202450
202346
202245
202146
202044
201948
201847
201744
201644
201543
201445
201349
201254
201148
201044
200948
200851
200756
200651
200558
200451
200368
200261
200137
200042
199952
199836
199738
199629
199528
199427
199328
199227
199127
199030
198934
198834
198738
198654
198554

Gila County compared with nearby places

Apache County: 33 indexCochise County: 45 indexCoconino County: 46 indexGila County: 47 indexLa Paz County: 44 indexMaricopa County: 73 indexMohave County: 17 indexNavajo County: 13 indexPima County: 54 indexPinal County: 67 indexSanta Cruz County: 49 indexYavapai County: 47 indexYuma County: 48 index
  • Under 37
  • 37 to 46
  • 46 to 47
  • 47 to 52
  • 52 and over
  • No data
Median Air Quality Index (US EPA), 2025, index. Gila 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), Gila County, 1985 to 2025) [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), Gila County, 1985 to 2025. 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/gila-county-arizona. 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), Gila County, 1985 to 2025. 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/gila-county-arizona.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Gila County, 1985 to 2025 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/gila-county-arizona (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2025,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Gila County, 1985 to 2025}},
  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/gila-county-arizona. 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), Gila County, 1985 to 2025
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/gila-county-arizona
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/gila-county-arizona.
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 Gila County?

Median Air Quality Index (US EPA) in Gila County was 47 in 2025, according to the U.S. Environmental Protection Agency. That is down 3 from 2024. That is the 6th highest of 13 counties in 2025.

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 Gila County?

68 in 2003, the highest value since 1985 in this series.

Related statistics for Gila County

All statistics for Gila County | Gila County in figures