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

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

Highest daily Air Quality Index (US EPA) in Humphreys County was 150 in 2003, according to the U.S. Environmental Protection Agency. That is the 18th highest of 30 counties in 2003.

2003, index150
Rank18th of 30Counties in Tennessee ranked
Series high1611996
Series low1331997

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 Humphreys County, 1996 to 2003

1301401501601701996199720031996: 161 index1997: 133 index2003: 150 index1301401501601701996199720031996: 161 index1997: 133 index2003: 150 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 3 values
Periodindex
2003150
1997133
1996161

Humphreys County compared with nearby places

Anderson County: 169 indexBlount County: 177 indexBradley County: 50 indexClaiborne County: 126 indexDavidson County: 150 indexDeKalb County: 159 indexDyer County: 106 indexHamilton County: 195 indexHaywood County: 166 indexHumphreys County: 150 indexJefferson County: 187 indexKnox County: 187 indexLawrence County: 159 indexLoudon County: 98 indexMcMinn County: 119 indexMadison County: 78 indexMaury County: 94 indexMeigs County: 147 indexMontgomery County: 108 indexObion County: 154 indexPutnam County: 177 indexRoane County: 92 indexRutherford County: 154 indexSevier County: 182 indexShelby County: 172 indexSullivan County: 182 indexSumner County: 174 indexUnion County: 104 indexWilliamson County: 156 indexWilson County: 159 index
  • Under 100
  • 100 to 140
  • 140 to 160
  • 160 to 170
  • 170 to 180
  • 180 and over
  • No data
Highest daily Air Quality Index (US EPA), 2003, index. Humphreys 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), Humphreys County, 1996 to 2003) [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), Humphreys County, 1996 to 2003. 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/humphreys-county-tennessee. 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), Humphreys County, 1996 to 2003. 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/humphreys-county-tennessee.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Humphreys County, 1996 to 2003 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/humphreys-county-tennessee (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2003,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Humphreys County, 1996 to 2003}},
  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/humphreys-county-tennessee. 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), Humphreys County, 1996 to 2003
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/humphreys-county-tennessee
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/humphreys-county-tennessee.
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 Humphreys County?

Highest daily Air Quality Index (US EPA) in Humphreys County was 150 in 2003, according to the U.S. Environmental Protection Agency. That is the 18th highest of 30 counties in 2003.

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 Humphreys County?

161 in 1996, the highest value since 1996 in this series.

Related statistics for Humphreys County

All statistics for Humphreys County | Humphreys County in figures