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

Median Air Quality Index (US EPA) in Power County

Median Air Quality Index (US EPA) in Power County was 20 in 2010, according to the U.S. Environmental Protection Agency. That is up 1 from 2009.

2010, index20
Change on 2009+1
Series high841999
Series low192009

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 Power County, 1996 to 2010

020406080100199619992002200520101996: 68 index1997: 51 index1998: 52 index1999: 84 index2000: 70 index2001: 60 index2002: 51 index2003: 46 index2004: 49 index2005: 50 index2006: 46 index2007: 34 index2008: 36 index2009: 19 index2010: 20 index02040608010019962001200620101996: 68 index1997: 51 index1998: 52 index1999: 84 index2000: 70 index2001: 60 index2002: 51 index2003: 46 index2004: 49 index2005: 50 index2006: 46 index2007: 34 index2008: 36 index2009: 19 index2010: 20 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 15 values
Periodindex
201020
200919
200836
200734
200646
200550
200449
200346
200251
200160
200070
199984
199852
199751
199668

Power County compared with nearby places

Ada County: 55 indexBannock County: 23 indexBenewah County: 43 indexBonner County: 9 indexButte County: 43 indexCanyon County: 30 indexCassia County: 45 indexCuster County: 10 indexFranklin County: 58 indexIdaho County: 13 indexKootenai County: 37 indexLatah County: 13 indexLemhi County: 43 indexNez Perce County: 22 indexPower County: 20 indexShoshone County: 54 indexTwin Falls County: 32 index
  • Under 14
  • 14 to 26
  • 26 to 41
  • 41 to 45
  • 45 and over
  • No data
Median Air Quality Index (US EPA), 2010, index. Power 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), Power County, 1996 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), Power County, 1996 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/power-county-idaho. 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), Power County, 1996 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/power-county-idaho.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Power County, 1996 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/power-county-idaho (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), Power County, 1996 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/power-county-idaho. 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), Power County, 1996 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/power-county-idaho
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/power-county-idaho.
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 Power County?

Median Air Quality Index (US EPA) in Power County was 20 in 2010, according to the U.S. Environmental Protection Agency. That is up 1 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 Power County?

84 in 1999, the highest value since 1996 in this series.

Related statistics for Power County

All statistics for Power County | Power County in figures