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

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

Highest daily Air Quality Index (US EPA) in Madison County was 140 in 2004, according to the U.S. Environmental Protection Agency. That is up 7 from 2003.

2004, index140
Change on 2003+7
Series high2051980
Series low1222001

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 Madison County, 1980 to 2004

12014016018020022019801988199119941997200020041980: 205 index1981: 147 index1982: 203 index1988: 154 index1989: 159 index1990: 150 index1991: 140 index1992: 126 index1993: 147 index1994: 147 index1995: 136 index1996: 143 index1997: 140 index1998: 185 index1999: 177 index2000: 140 index2001: 122 index2002: 156 index2003: 133 index2004: 140 index1001251501752002251980199220041980: 205 index1981: 147 index1982: 203 index1988: 154 index1989: 159 index1990: 150 index1991: 140 index1992: 126 index1993: 147 index1994: 147 index1995: 136 index1996: 143 index1997: 140 index1998: 185 index1999: 177 index2000: 140 index2001: 122 index2002: 156 index2003: 133 index2004: 140 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 20 values
Periodindex
2004140
2003133
2002156
2001122
2000140
1999177
1998185
1997140
1996143
1995136
1994147
1993147
1992126
1991140
1990150
1989159
1988154
1982203
1981147
1980205

Madison County compared with nearby places

Adams County: 119 indexBolivar County: 119 indexDeSoto County: 169 indexForrest County: 101 indexGrenada County: 81 indexHancock County: 122 indexHarrison County: 164 indexHinds County: 105 indexJackson County: 156 indexJones County: 98 indexLauderdale County: 108 indexLee County: 121 indexLowndes County: 103 indexMadison County: 140 indexMarshall County: 147 indexPearl River County: 115 indexRankin County: 96 indexScott County: 93 indexWarren County: 98 indexYalobusha County: 119 index
  • Under 98
  • 98 to 110
  • 110 to 120
  • 120 to 140
  • 140 and over
  • No data
Highest daily Air Quality Index (US EPA), 2004, index. Madison 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), Madison County, 1980 to 2004) [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), Madison County, 1980 to 2004. 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/madison-county-mississippi. 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), Madison County, 1980 to 2004. 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/madison-county-mississippi.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), Madison County, 1980 to 2004 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/madison-county-mississippi (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2004,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Madison County, 1980 to 2004}},
  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/madison-county-mississippi. 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), Madison County, 1980 to 2004
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/madison-county-mississippi
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/madison-county-mississippi.
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 Madison County?

Highest daily Air Quality Index (US EPA) in Madison County was 140 in 2004, according to the U.S. Environmental Protection Agency. That is up 7 from 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 Madison County?

205 in 1980, the highest value since 1980 in this series.

Related statistics for Madison County

All statistics for Madison County | Madison County in figures