Data / Share of days with good air quality (US EPA AQI) / Kauai County

Share of days with good air quality (US EPA AQI) in Kauai County

Share of days with good air quality (US EPA AQI) in Kauai County was 100% in 2022, according to EPA. That is unchanged from 2021.

2022100%
Change on 20210 pts
Series high1001985
Series low80.32012

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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Share of days with good air quality (US EPA AQI) in Kauai County, 1985 to 2022

8085909510019851990199520002006201520221985: 100 %1986: 100 %1987: 100 %1988: 100 %1989: 100 %1990: 100 %1991: 100 %1992: 100 %1993: 100 %1994: 100 %1995: 100 %1996: 100 %1997: 100 %1998: 100 %1999: 100 %2000: 100 %2002: 100 %2003: 100 %2004: 100 %2005: 100 %2006: 100 %2011: 93.1 %2012: 80.3 %2013: 96.2 %2014: 94.4 %2015: 96.1 %2016: 98.3 %2017: 98.3 %2018: 98.6 %2019: 99.4 %2020: 98.9 %2021: 100 %2022: 100 %8085909510019851996201220221985: 100 %1986: 100 %1987: 100 %1988: 100 %1989: 100 %1990: 100 %1991: 100 %1992: 100 %1993: 100 %1994: 100 %1995: 100 %1996: 100 %1997: 100 %1998: 100 %1999: 100 %2000: 100 %2002: 100 %2003: 100 %2004: 100 %2005: 100 %2006: 100 %2011: 93.1 %2012: 80.3 %2013: 96.2 %2014: 94.4 %2015: 96.1 %2016: 98.3 %2017: 98.3 %2018: 98.6 %2019: 99.4 %2020: 98.9 %2021: 100 %2022: 100 %
%. Source: Invokely calculation with data from EPA. Retrieved 2026-10-12, published 2026-07-13.
All 33 values
Period%
2022100
2021100
202098.9
201999.4
201898.6
201798.3
201698.3
201596.1
201494.4
201396.2
201280.3
201193.1
2006100
2005100
2004100
2003100
2002100
2000100
1999100
1998100
1997100
1996100
1995100
1994100
1993100
1992100
1991100
1990100
1989100
1988100
1987100
1986100
1985100

Kauai County compared with nearby places

Hawaii County: 89.9 %Honolulu County: 97.5 %Kauai County: 100 %Maui County: 98.9 %
  • Under 96
  • 96 to 98
  • 98 to 99
  • 99 and over
  • No data
Share of days with good air quality (US EPA AQI), 2022, %. Kauai 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.

Definition

Days with a daily Air Quality Index of 0 to 50 (good) as a percentage of the days of the year with an AQI in a US county. Calculated by Invokely from the day counts in the EPA AirData annual summaries; both counts are stored with each value.

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: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts (Share of days with good air quality (US EPA AQI), Kauai County, 1985 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: good days as a share of days with an AQI, calculated with stored counts, Share of days with good air quality (US EPA AQI), Kauai County, 1985 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/good-air-quality-days-share/kauai-county-hawaii. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Share of days with good air quality (US EPA AQI), Kauai County, 1985 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/good-air-quality-days-share/kauai-county-hawaii.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts, Share of days with good air quality (US EPA AQI), Kauai County, 1985 to 2022 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/good-air-quality-days-share/kauai-county-hawaii (Accessed: 12 October 2026).

BibTeX
@misc{environmental_share_of_days_with_2022,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts: Share of days with good air quality (US EPA AQI), Kauai County, 1985 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/good-air-quality-days-share/kauai-county-hawaii. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. 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: good days as a share of days with an AQI, calculated with stored counts: Share of days with good air quality (US EPA AQI), Kauai County, 1985 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/good-air-quality-days-share/kauai-county-hawaii
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/good-air-quality-days-share/kauai-county-hawaii.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual. Retrieved 2026-10-12.
ER  -
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Questions

What is the share of days with good air quality (US EPA AQI) in Kauai County?

Share of days with good air quality (US EPA AQI) in Kauai County was 100% in 2022, according to EPA. That is unchanged from 2021.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: good days as a share of days with an AQI, calculated with stored counts. Retrieved by Invokely on 2026-10-12.

What was the highest share of days with good air quality (US EPA AQI) in Kauai County?

100% in 1985, the highest value since 1985 in this series.

Related statistics for Kauai County

All statistics for Kauai County | Kauai County in figures