Data / Highest daily Air Quality Index (US EPA) / St. Martin Parish

Highest daily Air Quality Index (US EPA) in St. Martin Parish

Highest daily Air Quality Index (US EPA) in St. Martin Parish was 77 in 2025, according to the U.S. Environmental Protection Agency. That is down 24 from 2024.

2025, index77
Change on 2024-24
Series high1122023
Series low772025

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 St. Martin Parish, 2015 to 2025

7080901001101202015201720192021202320252015: 84 index2016: 97 index2017: 101 index2018: 97 index2019: 80 index2020: 87 index2021: 87 index2022: 97 index2023: 112 index2024: 101 index2025: 77 index7080901001101202015201920252015: 84 index2016: 97 index2017: 101 index2018: 97 index2019: 80 index2020: 87 index2021: 87 index2022: 97 index2023: 112 index2024: 101 index2025: 77 index
index. Source: EPA, EPA AirData annual AQI by county: highest daily AQI. Retrieved 2026-10-12, published 2026-07-13.
All 11 values
Periodindex
202577
2024101
2023112
202297
202187
202087
201980
201897
2017101
201697
201584

St. Martin Parish compared with nearby places

Ascension Parish: 108 indexBossier Parish: 101 indexCaddo Parish: 80 indexCalcasieu Parish: 108 indexEast Baton Rouge Parish: 115 indexIberville Parish: 105 indexJefferson Parish: 101 indexLafayette Parish: 79 indexLafourche Parish: 109 indexLivingston Parish: 90 indexOrleans Parish: 71 indexOuachita Parish: 80 indexPointe Coupee Parish: 93 indexRapides Parish: 67 indexSt. Bernard Parish: 93 indexSt. James Parish: 84 indexSt. John the Baptist Parish: 87 indexSt. Martin Parish: 77 indexSt. Tammany Parish: 105 indexTangipahoa Parish: 64 indexTerrebonne Parish: 66 indexWest Baton Rouge Parish: 122 index
  • Under 77
  • 77 to 85
  • 85 to 98
  • 98 to 110
  • 110 and over
  • No data
Highest daily Air Quality Index (US EPA), 2025, index. St. Martin 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

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), St. Martin Parish, 2015 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: highest daily AQI, Highest daily Air Quality Index (US EPA), St. Martin Parish, 2015 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/highest-daily-air-quality-index/st-martin-parish-louisiana. 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), St. Martin Parish, 2015 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/highest-daily-air-quality-index/st-martin-parish-louisiana.

Harvard

U.S. Environmental Protection Agency (2026) EPA AirData annual AQI by county: highest daily AQI, Highest daily Air Quality Index (US EPA), St. Martin Parish, 2015 to 2025 [Dataset]. Available at: https://aqs.epa.gov/aqsweb/airdata/download_files.html#Annual, via Invokely: https://invokely.ai/en/highest-daily-air-quality-index/st-martin-parish-louisiana (Accessed: 12 October 2026).

BibTeX
@misc{environmental_highest_daily_air_quality_2025,
  author = {{U.S. Environmental Protection Agency}},
  title = {{EPA AirData annual AQI by county: highest daily AQI: Highest daily Air Quality Index (US EPA), St. Martin Parish, 2015 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/highest-daily-air-quality-index/st-martin-parish-louisiana. 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), St. Martin Parish, 2015 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/highest-daily-air-quality-index/st-martin-parish-louisiana
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/en/highest-daily-air-quality-index/st-martin-parish-louisiana.
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 St. Martin Parish?

Highest daily Air Quality Index (US EPA) in St. Martin Parish was 77 in 2025, according to the U.S. Environmental Protection Agency. That is down 24 from 2024.

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 St. Martin Parish?

112 in 2023, the highest value since 2015 in this series.

Related statistics for St. Martin Parish

All statistics for St. Martin Parish | St. Martin Parish in figures