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

Highest daily Air Quality Index (US EPA) in Pend Oreille County

Highest daily Air Quality Index (US EPA) in Pend Oreille County was 81 in 2022, according to the U.S. Environmental Protection Agency. That is down 115 from 2021.

2022, index81
Change on 2021-115
Series high1962021
Series low262006

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 Pend Oreille County, 2006 to 2022

050100150200200620082010202020222006: 26 index2007: 47 index2008: 74 index2009: 67 index2010: 69 index2011: 154 index2020: 63 index2021: 196 index2022: 81 index0501001502002006200920222006: 26 index2007: 47 index2008: 74 index2009: 67 index2010: 69 index2011: 154 index2020: 63 index2021: 196 index2022: 81 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 9 values
Periodindex
202281
2021196
202063
2011154
201069
200967
200874
200747
200626

Pend Oreille County compared with nearby places

Adams County: 162 indexAsotin County: 200 indexBenton County: 151 indexChelan County: 290 indexClallam County: 124 indexClark County: 175 indexColumbia County: 135 indexCowlitz County: 144 indexFranklin County: 170 indexGarfield County: 161 indexGrant County: 165 indexGrays Harbor County: 112 indexJefferson County: 90 indexKing County: 237 indexKitsap County: 143 indexKittitas County: 164 indexKlickitat County: 96 indexLewis County: 198 indexMason County: 125 indexOkanogan County: 248 indexPend Oreille County: 81 indexPierce County: 178 indexSkagit County: 183 indexSnohomish County: 362 indexSpokane County: 185 indexStevens County: 153 indexThurston County: 157 indexWalla Walla County: 152 indexWhatcom County: 243 indexWhitman County: 190 indexYakima County: 158 index
  • Under 130
  • 130 to 150
  • 150 to 160
  • 160 to 180
  • 180 to 200
  • 200 and over
  • No data
Highest daily Air Quality Index (US EPA), 2022, index. Pend Oreille 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), Pend Oreille County, 2006 to 2022) [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), Pend Oreille County, 2006 to 2022. 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/pend-oreille-county-washington. 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), Pend Oreille County, 2006 to 2022. 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/pend-oreille-county-washington.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Pend Oreille County, 2006 to 2022 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/pend-oreille-county-washington (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2022,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Pend Oreille County, 2006 to 2022}},
  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/pend-oreille-county-washington. 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), Pend Oreille County, 2006 to 2022
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/pend-oreille-county-washington
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/pend-oreille-county-washington.
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 Pend Oreille County?

Highest daily Air Quality Index (US EPA) in Pend Oreille County was 81 in 2022, according to the U.S. Environmental Protection Agency. That is down 115 from 2021.

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 Pend Oreille County?

196 in 2021, the highest value since 2006 in this series.

Related statistics for Pend Oreille County

All statistics for Pend Oreille County | Pend Oreille County in figures