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

Median Air Quality Index (US EPA) in Concordia Parish

Median Air Quality Index (US EPA) in Concordia Parish was 51 in 2006, according to the U.S. Environmental Protection Agency. That is down 4 from 2005.

2006, index51
Change on 2005-4
Series high561999
Series low502004

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 Concordia Parish, 1999 to 2006

5052545619992001200320061999: 56 index2000: 55 index2001: 55 index2002: 52 index2003: 54 index2004: 50 index2005: 55 index2006: 51 index505254561999200220061999: 56 index2000: 55 index2001: 55 index2002: 52 index2003: 54 index2004: 50 index2005: 55 index2006: 51 index
index. Source: EPA, EPA AirData annual AQI by county: median daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 8 values
Periodindex
200651
200555
200450
200354
200252
200155
200055
199956

Concordia Parish compared with nearby places

Ascension Parish: 40 indexBossier Parish: 53 indexCaddo Parish: 48 indexCalcasieu Parish: 55 indexConcordia Parish: 51 indexEast Baton Rouge Parish: 61 indexIberville Parish: 47 indexJefferson Parish: 58 indexLafayette Parish: 44 indexLafourche Parish: 54 indexLivingston Parish: 53 indexOrleans Parish: 56 indexOuachita Parish: 43 indexPointe Coupee Parish: 41 indexRapides Parish: 52 indexSt. Bernard Parish: 57 indexSt. Charles Parish: 37 indexSt. James Parish: 37 indexSt. John the Baptist Parish: 38 indexSt. Tammany Parish: 58 indexTangipahoa Parish: 56 indexTerrebonne Parish: 52 indexWest Baton Rouge Parish: 60 indexWinn Parish: 46 index
  • Under 42
  • 42 to 49
  • 49 to 53
  • 53 to 56
  • 56 and over
  • No data
Median Air Quality Index (US EPA), 2006, index. Concordia 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), Concordia Parish, 1999 to 2006) [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), Concordia Parish, 1999 to 2006. 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/concordia-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), Concordia Parish, 1999 to 2006. 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/concordia-parish-louisiana.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: median daily AQI, Median Air Quality Index (US EPA), Concordia Parish, 1999 to 2006 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/median-air-quality-index/concordia-parish-louisiana (Accessed: 12 October 2026).

BibTeX
@misc{environmental_median_air_quality_index_2006,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: median daily AQI: Median Air Quality Index (US EPA), Concordia Parish, 1999 to 2006}},
  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/concordia-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), Concordia Parish, 1999 to 2006
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/concordia-parish-louisiana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/median-air-quality-index/concordia-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 Concordia Parish?

Median Air Quality Index (US EPA) in Concordia Parish was 51 in 2006, according to the U.S. Environmental Protection Agency. That is down 4 from 2005.

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 Concordia Parish?

56 in 1999, the highest value since 1999 in this series.

Related statistics for Concordia Parish

All statistics for Concordia Parish | Concordia Parish in figures