Data / Highest daily Air Quality Index (US EPA) / Elbert County

Highest daily Air Quality Index (US EPA) in Elbert County

Highest daily Air Quality Index (US EPA) in Elbert County was 43 in 2011, according to the U.S. Environmental Protection Agency. That is down 16 from 2010.

2011, index43
Change on 2010-16
Series high722006
Series low432011

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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Highest daily Air Quality Index (US EPA) in Elbert County, 1999 to 2011

405060708019992001200320052007200920111999: 55 index2000: 57 index2001: 56 index2002: 60 index2003: 55 index2004: 57 index2005: 61 index2006: 72 index2007: 57 index2008: 54 index2009: 54 index2010: 59 index2011: 43 index40506070801999200420111999: 55 index2000: 57 index2001: 56 index2002: 60 index2003: 55 index2004: 57 index2005: 61 index2006: 72 index2007: 57 index2008: 54 index2009: 54 index2010: 59 index2011: 43 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 13 values
Periodindex
201143
201059
200954
200854
200757
200672
200561
200457
200355
200260
200156
200057
199955

Elbert County compared with nearby places

Adams County: 159 indexAlamosa County: 534 indexArapahoe County: 159 indexArchuleta County: 78 indexBoulder County: 140 indexChaffee County: 112 indexClear Creek County: 187 indexDelta County: 47 indexDenver County: 161 indexDouglas County: 185 indexElbert County: 43 indexEl Paso County: 143 indexFremont County: 59 indexGarfield County: 133 indexGunnison County: 119 indexJackson County: 44 indexJefferson County: 197 indexLa Plata County: 150 indexLarimer County: 151 indexMesa County: 119 indexMoffat County: 84 indexMontezuma County: 126 indexPark County: 126 indexPitkin County: 119 indexProwers County: 119 indexPueblo County: 82 indexRio Blanco County: 156 indexRoutt County: 91 indexSan Juan County: 48 indexSan Miguel County: 101 indexSummit County: 66 indexWeld County: 136 index
  • Under 68
  • 68 to 100
  • 100 to 120
  • 120 to 140
  • 140 to 160
  • 160 and over
  • No data
Highest daily Air Quality Index (US EPA), 2011, index. Elbert 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

Highest daily Air Quality Index (AQI) value recorded in a US county during the year, from the EPA AirData annual summaries. Values above 500 are beyond the AQI scale and are published as EPA computes them.

A single day decides the value, so one wildfire or dust event can set it. Dust from the dry Owens Lake bed puts Inyo and Mono counties in California in the thousands. 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: highest 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: highest daily AQI (Highest daily Air Quality Index (US EPA), Elbert County, 1999 to 2011) [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: highest daily AQI, Highest daily Air Quality Index (US EPA), Elbert County, 1999 to 2011. U.S. Environmental Protection Agency, 13 July 2026, https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Invokely, https://invokely.ai/en/highest-daily-air-quality-index/elbert-county-colorado. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: highest daily AQI. Highest daily Air Quality Index (US EPA), Elbert County, 1999 to 2011. Dataset. Accessed October 12, 2026. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Also distributed by Invokely, https://invokely.ai/en/highest-daily-air-quality-index/elbert-county-colorado.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Elbert County, 1999 to 2011 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/elbert-county-colorado (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2011,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Elbert County, 1999 to 2011}},
  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/highest-daily-air-quality-index/elbert-county-colorado. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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: highest daily AQI: Highest daily Air Quality Index (US EPA), Elbert County, 1999 to 2011
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/highest-daily-air-quality-index/elbert-county-colorado
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/elbert-county-colorado.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: highest 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 highest daily Air Quality Index (US EPA) in Elbert County?

Highest daily Air Quality Index (US EPA) in Elbert County was 43 in 2011, according to the U.S. Environmental Protection Agency. That is down 16 from 2010.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: highest daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest highest daily Air Quality Index (US EPA) in Elbert County?

72 in 2006, the highest value since 1999 in this series.

Related statistics for Elbert County

All statistics for Elbert County | Elbert County in figures