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

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

Highest daily Air Quality Index (US EPA) in Honolulu County was 59 in 2025, according to the U.S. Environmental Protection Agency. That is down 26 from 2024.

2025, index59
Change on 2024-26
Series high2202001
Series low341980

Next release: Tuesday, 13 July 2027, estimated by Invokely from past publication dates (low confidence), not announced by the publisher. Release calendar

Get an email when a new figure is out or this one is revised.
Keep it in a collection in your library.

Highest daily Air Quality Index (US EPA) in Honolulu County, 1980 to 2025

05010015020025019801987199420012008201520251980: 34 index1981: 80 index1982: 115 index1983: 71 index1984: 165 index1985: 65 index1986: 56 index1987: 45 index1988: 48 index1989: 44 index1990: 53 index1991: 57 index1992: 105 index1993: 64 index1994: 72 index1995: 62 index1996: 48 index1997: 46 index1998: 75 index1999: 186 index2000: 206 index2001: 220 index2002: 152 index2003: 176 index2004: 184 index2005: 174 index2006: 149 index2007: 71 index2008: 99 index2009: 165 index2010: 155 index2011: 101 index2012: 78 index2013: 71 index2014: 195 index2015: 66 index2016: 64 index2017: 68 index2018: 73 index2019: 62 index2020: 63 index2021: 58 index2022: 57 index2023: 117 index2024: 85 index2025: 59 index05010015020025019801996201220251980: 34 index1981: 80 index1982: 115 index1983: 71 index1984: 165 index1985: 65 index1986: 56 index1987: 45 index1988: 48 index1989: 44 index1990: 53 index1991: 57 index1992: 105 index1993: 64 index1994: 72 index1995: 62 index1996: 48 index1997: 46 index1998: 75 index1999: 186 index2000: 206 index2001: 220 index2002: 152 index2003: 176 index2004: 184 index2005: 174 index2006: 149 index2007: 71 index2008: 99 index2009: 165 index2010: 155 index2011: 101 index2012: 78 index2013: 71 index2014: 195 index2015: 66 index2016: 64 index2017: 68 index2018: 73 index2019: 62 index2020: 63 index2021: 58 index2022: 57 index2023: 117 index2024: 85 index2025: 59 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 46 values
Periodindex
202559
202485
2023117
202257
202158
202063
201962
201873
201768
201664
201566
2014195
201371
201278
2011101
2010155
2009165
200899
200771
2006149
2005174
2004184
2003176
2002152
2001220
2000206
1999186
199875
199746
199648
199562
199472
199364
1992105
199157
199053
198944
198848
198745
198656
198565
1984165
198371
1982115
198180
198034

Honolulu County compared with nearby places

Hawaii County: 93 indexHonolulu County: 59 indexMaui County: 69 index
  • Under 66
  • 66 to 77
  • 77 and over
  • No data
Highest daily Air Quality Index (US EPA), 2025, index. Honolulu 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

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.

Report a problem with this figure

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), Honolulu County, 1980 to 2025) [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), Honolulu County, 1980 to 2025. 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/honolulu-county-hawaii. 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), Honolulu County, 1980 to 2025. 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/honolulu-county-hawaii.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Honolulu County, 1980 to 2025 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/honolulu-county-hawaii (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2025,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Honolulu County, 1980 to 2025}},
  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/honolulu-county-hawaii. 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), Honolulu County, 1980 to 2025
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/honolulu-county-hawaii
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/honolulu-county-hawaii.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

What is the latest highest daily Air Quality Index (US EPA) in Honolulu County? Cite the source.
get_value {"indicator":"aqi_max","place":"us-county-15003"}
GET https://invokely.ai/api/v1/value?indicator=aqi_max&place=us-county-15003

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

What is the highest daily Air Quality Index (US EPA) in Honolulu County?

Highest daily Air Quality Index (US EPA) in Honolulu County was 59 in 2025, according to the U.S. Environmental Protection Agency. That is down 26 from 2024.

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 Honolulu County?

220 in 2001, the highest value since 1980 in this series.

Related statistics for Honolulu County

All statistics for Honolulu County | Honolulu County in figures