Data / Median Air Quality Index (US EPA) / Jeff Davis County

Median Air Quality Index (US EPA) in Jeff Davis County

Median Air Quality Index (US EPA) in Jeff Davis County was 21 in 2010, according to the U.S. Environmental Protection Agency. That is down 5 from 2009.

2010, index21
Change on 2009-5
Series high292008
Series low152005

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 Jeff Davis County, 2002 to 2010

15202530200220042006200820102002: 21 index2003: 19 index2004: 21 index2005: 15 index2006: 26 index2007: 24 index2008: 29 index2009: 26 index2010: 21 index152025302002200520102002: 21 index2003: 19 index2004: 21 index2005: 15 index2006: 26 index2007: 24 index2008: 29 index2009: 26 index2010: 21 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 9 values
Periodindex
201021
200926
200829
200724
200626
200515
200421
200319
200221

Jeff Davis County compared with nearby places

Bell County: 37 indexBexar County: 51 indexBowie County: 56 indexBrazoria County: 36 indexBrewster County: 44 indexCameron County: 48 indexCollin County: 38 indexCulberson County: 18 indexDallas County: 54 indexDenton County: 49 indexEctor County: 41 indexEllis County: 50 indexEl Paso County: 58 indexFayette County: 40 indexGalveston County: 45 indexGregg County: 37 indexHarris County: 60 indexHarrison County: 52 indexHays County: 34 indexHidalgo County: 50 indexHood County: 35 indexHunt County: 36 indexJeff Davis County: 21 indexJefferson County: 54 indexJohnson County: 36 indexKaufman County: 49 indexKleberg County: 47 indexLubbock County: 35 indexMcLennan County: 44 indexMaverick County: 39 indexMontgomery County: 53 indexNavarro County: 49 indexNueces County: 47 indexOrange County: 52 indexParker County: 38 indexPolk County: 39 indexPotter County: 31 indexRandall County: 40 indexRockwall County: 37 indexSmith County: 38 indexTarrant County: 53 indexTravis County: 46 indexVictoria County: 32 indexWebb County: 48 indexWichita County: 34 index
  • Under 35
  • 35 to 38
  • 38 to 44
  • 44 to 48
  • 48 to 52
  • 52 and over
  • No data
Median Air Quality Index (US EPA), 2010, index. Jeff Davis 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), Jeff Davis County, 2002 to 2010) [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), Jeff Davis County, 2002 to 2010. 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/jeff-davis-county-texas. 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), Jeff Davis County, 2002 to 2010. 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/jeff-davis-county-texas.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Jeff Davis County, 2002 to 2010 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/jeff-davis-county-texas (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2010,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Jeff Davis County, 2002 to 2010}},
  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/jeff-davis-county-texas. 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), Jeff Davis County, 2002 to 2010
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/jeff-davis-county-texas
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/jeff-davis-county-texas.
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 Jeff Davis County?

Median Air Quality Index (US EPA) in Jeff Davis County was 21 in 2010, according to the U.S. Environmental Protection Agency. That is down 5 from 2009.

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 Jeff Davis County?

29 in 2008, the highest value since 2002 in this series.

Related statistics for Jeff Davis County

All statistics for Jeff Davis County | Jeff Davis County in figures