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

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

Highest daily Air Quality Index (US EPA) in Howell County was 96 in 2001, according to the U.S. Environmental Protection Agency. That is down 9 from 2000.

2001, index96
Change on 2000-9
Series high1,7321996
Series low962001

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 Howell County, 1996 to 2001

05001,0001,5002,000199619971999200020011996: 1,732 index1997: 620 index1999: 137 index2000: 105 index2001: 96 index05001,0001,5002,0001996199920011996: 1,732 index1997: 620 index1999: 137 index2000: 105 index2001: 96 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 5 values
Periodindex
200196
2000105
1999137
1997620
19961,732

Howell County compared with nearby places

Buchanan County: 100 indexCass County: 126 indexCedar County: 122 indexClay County: 156 indexGreene County: 151 indexHowell County: 96 indexJackson County: 111 indexJasper County: 507 indexJefferson County: 161 indexLincoln County: 45 indexMaries County: 1,128 indexMercer County: 42 indexMonroe County: 156 indexPlatte County: 166 indexSt. Charles County: 185 indexSte. Genevieve County: 185 indexSt. Louis County: 164 indexStoddard County: 156 indexSullivan County: 24 indexTaney County: 90 indexSt. Louis city: 147 index
  • Under 100
  • 100 to 130
  • 130 to 160
  • 160 to 170
  • 170 and over
  • No data
Highest daily Air Quality Index (US EPA), 2001, index. Howell 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), Howell County, 1996 to 2001) [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), Howell County, 1996 to 2001. 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/howell-county-missouri. 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), Howell County, 1996 to 2001. 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/howell-county-missouri.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Howell County, 1996 to 2001 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/howell-county-missouri (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2001,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Howell County, 1996 to 2001}},
  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/howell-county-missouri. 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), Howell County, 1996 to 2001
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/howell-county-missouri
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/howell-county-missouri.
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 Howell County?

Highest daily Air Quality Index (US EPA) in Howell County was 96 in 2001, according to the U.S. Environmental Protection Agency. That is down 9 from 2000.

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 Howell County?

1,732 in 1996, the highest value since 1996 in this series.

Related statistics for Howell County

All statistics for Howell County | Howell County in figures