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

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

Highest daily Air Quality Index (US EPA) in Caribou County was 62 in 2004, according to the U.S. Environmental Protection Agency. That is down 7 from 2003.

2004, index62
Change on 2003-7
Series high1201988
Series low472001

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 Caribou County, 1986 to 2004

40608010012019861989199219951998200120041986: 109 index1987: 85 index1988: 120 index1989: 89 index1990: 78 index1991: 53 index1992: 100 index1993: 51 index1994: 63 index1995: 60 index1996: 62 index1997: 55 index1998: 77 index1999: 68 index2000: 55 index2001: 47 index2002: 63 index2003: 69 index2004: 62 index4060801001201986199320041986: 109 index1987: 85 index1988: 120 index1989: 89 index1990: 78 index1991: 53 index1992: 100 index1993: 51 index1994: 63 index1995: 60 index1996: 62 index1997: 55 index1998: 77 index1999: 68 index2000: 55 index2001: 47 index2002: 63 index2003: 69 index2004: 62 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 19 values
Periodindex
200462
200369
200263
200147
200055
199968
199877
199755
199662
199560
199463
199351
1992100
199153
199078
198989
1988120
198785
1986109

Caribou County compared with nearby places

Ada County: 120 indexBannock County: 161 indexBenewah County: 133 indexBingham County: 62 indexBoise County: 131 indexBonner County: 63 indexBonneville County: 153 indexBoundary County: 78 indexButte County: 84 indexCanyon County: 134 indexCaribou County: 62 indexCuster County: 70 indexElmore County: 80 indexFranklin County: 56 indexGem County: 80 indexIdaho County: 84 indexKootenai County: 143 indexLatah County: 68 indexLemhi County: 113 indexNez Perce County: 70 indexPower County: 172 indexShoshone County: 134 indexTwin Falls County: 90 indexValley County: 97 index
  • Under 69
  • 69 to 81
  • 81 to 110
  • 110 to 130
  • 130 and over
  • No data
Highest daily Air Quality Index (US EPA), 2004, index. Caribou 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), Caribou County, 1986 to 2004) [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), Caribou County, 1986 to 2004. 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/caribou-county-idaho. 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), Caribou County, 1986 to 2004. 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/caribou-county-idaho.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Caribou County, 1986 to 2004 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/caribou-county-idaho (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2004,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Caribou County, 1986 to 2004}},
  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/caribou-county-idaho. 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), Caribou County, 1986 to 2004
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/caribou-county-idaho
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/caribou-county-idaho.
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 Caribou County?

Highest daily Air Quality Index (US EPA) in Caribou County was 62 in 2004, according to the U.S. Environmental Protection Agency. That is down 7 from 2003.

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 Caribou County?

120 in 1988, the highest value since 1986 in this series.

Related statistics for Caribou County

All statistics for Caribou County | Caribou County in figures