Data / Median Air Quality Index (US EPA) / Iberville Parish

Median Air Quality Index (US EPA) in Iberville Parish

Median Air Quality Index (US EPA) in Iberville Parish was 40 in 2025, according to the U.S. Environmental Protection Agency. That is down 1 from 2024.

2025, index40
Change on 2024-1
Series high502005
Series low271983

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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Median Air Quality Index (US EPA) in Iberville Parish, 1980 to 2025

25303540455019801987199420012008201520251980: 37 index1981: 35 index1982: 28 index1983: 27 index1984: 28 index1985: 33 index1986: 39 index1987: 42 index1988: 39 index1989: 35 index1990: 38 index1991: 34 index1992: 42 index1993: 41 index1994: 38 index1995: 40 index1996: 38 index1997: 41 index1998: 40 index1999: 47 index2000: 45 index2001: 44 index2002: 42 index2003: 45 index2004: 44 index2005: 50 index2006: 47 index2007: 46 index2008: 42 index2009: 43 index2010: 45 index2011: 43 index2012: 42 index2013: 40 index2014: 39 index2015: 35 index2016: 40 index2017: 40 index2018: 38 index2019: 38 index2020: 38 index2021: 39 index2022: 42 index2023: 44 index2024: 41 index2025: 40 index2030405019801996201220251980: 37 index1981: 35 index1982: 28 index1983: 27 index1984: 28 index1985: 33 index1986: 39 index1987: 42 index1988: 39 index1989: 35 index1990: 38 index1991: 34 index1992: 42 index1993: 41 index1994: 38 index1995: 40 index1996: 38 index1997: 41 index1998: 40 index1999: 47 index2000: 45 index2001: 44 index2002: 42 index2003: 45 index2004: 44 index2005: 50 index2006: 47 index2007: 46 index2008: 42 index2009: 43 index2010: 45 index2011: 43 index2012: 42 index2013: 40 index2014: 39 index2015: 35 index2016: 40 index2017: 40 index2018: 38 index2019: 38 index2020: 38 index2021: 39 index2022: 42 index2023: 44 index2024: 41 index2025: 40 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 46 values
Periodindex
202540
202441
202344
202242
202139
202038
201938
201838
201740
201640
201535
201439
201340
201242
201143
201045
200943
200842
200746
200647
200550
200444
200345
200242
200144
200045
199947
199840
199741
199638
199540
199438
199341
199242
199134
199038
198935
198839
198742
198639
198533
198428
198327
198228
198135
198037

Iberville Parish compared with nearby places

Ascension Parish: 33 indexBossier Parish: 42 indexCaddo Parish: 38 indexCalcasieu Parish: 47 indexEast Baton Rouge Parish: 51 indexIberville Parish: 40 indexJefferson Parish: 47 indexLafayette Parish: 45 indexLafourche Parish: 44 indexLivingston Parish: 45 indexOrleans Parish: 42 indexOuachita Parish: 45 indexPointe Coupee Parish: 35 indexRapides Parish: 37 indexSt. Bernard Parish: 44 indexSt. James Parish: 33 indexSt. John the Baptist Parish: 34 indexSt. Martin Parish: 36 indexSt. Tammany Parish: 37 indexTangipahoa Parish: 41 indexTerrebonne Parish: 42 indexWest Baton Rouge Parish: 51 index
  • Under 36
  • 36 to 40
  • 40 to 43
  • 43 to 45
  • 45 and over
  • No data
Median Air Quality Index (US EPA), 2025, index. Iberville Parish 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

Median of the daily Air Quality Index (AQI) values of a US county over the days of the year with an AQI, from the EPA AirData annual summaries.

More on how it is measured
  • The daily county AQI is the highest AQI among the monitors and pollutants reported that day (ozone, PM2.5, PM10, carbon monoxide and nitrogen dioxide).
  • Lower is cleaner: 0 to 50 is good, 51 to 100 moderate and above 100 unhealthy for sensitive groups.

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: median 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: median daily AQI (Median Air Quality Index (US EPA), Iberville Parish, 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: median daily AQI, Median Air Quality Index (US EPA), Iberville Parish, 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/median-air-quality-index/iberville-parish-louisiana. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Environmental Protection Agency. 2026. EPA AirData annual AQI by county: median daily AQI. Median Air Quality Index (US EPA), Iberville Parish, 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/median-air-quality-index/iberville-parish-louisiana.

Harvard

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

BibTeX
@misc{environmental_median_air_quality_index_2025,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Iberville Parish, 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/median-air-quality-index/iberville-parish-louisiana. Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median 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: median daily AQI: Median Air Quality Index (US EPA), Iberville Parish, 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/median-air-quality-index/iberville-parish-louisiana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/iberville-parish-louisiana.
N1  - Publisher attribution: U.S. Environmental Protection Agency, Air Quality System, AirData. EPA AirData annual AQI by county: median 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 median Air Quality Index (US EPA) in Iberville Parish?

Median Air Quality Index (US EPA) in Iberville Parish was 40 in 2025, according to the U.S. Environmental Protection Agency. That is down 1 from 2024.

Where does this figure come from?

U.S. Environmental Protection Agency. EPA AirData annual AQI by county: median daily AQI. Retrieved by Invokely on 2026-10-12.

What was the highest median Air Quality Index (US EPA) in Iberville Parish?

50 in 2005, the highest value since 1980 in this series.

Related statistics for Iberville Parish

All statistics for Iberville Parish | Iberville Parish in figures