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

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

Highest daily Air Quality Index (US EPA) in Warren County was 137 in 2005, according to the U.S. Environmental Protection Agency. That is up 39 from 2004. That is the 8th highest of 19 counties in 2005.

2005, index137
Change on 2004+39
Rank8th of 19Counties in Mississippi ranked
Series high2071989
Series low982004

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 Warren County, 1987 to 2005

7510012515017520022519871990199319961999200220051987: 154 index1988: 195 index1989: 207 index1990: 164 index1991: 140 index1992: 112 index1993: 133 index1994: 159 index1995: 126 index1996: 150 index1997: 133 index1998: 159 index1999: 136 index2000: 156 index2001: 136 index2002: 146 index2003: 126 index2004: 98 index2005: 137 index501001502002501987199420051987: 154 index1988: 195 index1989: 207 index1990: 164 index1991: 140 index1992: 112 index1993: 133 index1994: 159 index1995: 126 index1996: 150 index1997: 133 index1998: 159 index1999: 136 index2000: 156 index2001: 136 index2002: 146 index2003: 126 index2004: 98 index2005: 137 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 19 values
Periodindex
2005137
200498
2003126
2002146
2001136
2000156
1999136
1998159
1997133
1996150
1995126
1994159
1993133
1992112
1991140
1990164
1989207
1988195
1987154

Warren County compared with nearby places

Adams County: 126 indexBolivar County: 135 indexDeSoto County: 172 indexForrest County: 156 indexGrenada County: 95 indexHancock County: 136 indexHarrison County: 156 indexHinds County: 174 indexJackson County: 147 indexJones County: 129 indexLauderdale County: 156 indexLee County: 140 indexLowndes County: 117 indexMarshall County: 47 indexPearl River County: 106 indexRankin County: 64 indexScott County: 135 indexWarren County: 137 indexYalobusha County: 122 index
  • Under 110
  • 110 to 130
  • 130 to 140
  • 140 to 160
  • 160 and over
  • No data
Highest daily Air Quality Index (US EPA), 2005, index. Warren 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), Warren County, 1987 to 2005) [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), Warren County, 1987 to 2005. 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/warren-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), Warren County, 1987 to 2005. 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/warren-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), Warren County, 1987 to 2005 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/warren-county-mississippi (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2005,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), Warren County, 1987 to 2005}},
  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/warren-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), Warren County, 1987 to 2005
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/warren-county-mississippi
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/warren-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 Warren County?

Highest daily Air Quality Index (US EPA) in Warren County was 137 in 2005, according to the U.S. Environmental Protection Agency. That is up 39 from 2004. That is the 8th highest of 19 counties in 2005.

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 Warren County?

207 in 1989, the highest value since 1987 in this series.

Related statistics for Warren County

All statistics for Warren County | Warren County in figures