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HomeEnvironmentAir pollution: the level goes back to green in St. Martin

Air pollution: the level goes back to green in St. Martin

MARIGOT: After two days spent in orange level, the levels of fine particles PM10 have gone below 50 μg/m3, value corresponding to the recommendation and information threshold. In view of this finding, the persistent alert procedure has been lifted.

The regional air quality observatory Gwad’Air predicted for this Tuesday 30 and Wednesday, August 31, 2022 the exceedance of the alert threshold of 50 micrograms per cubic meter over 24 hours relating to fine particles PM10 (particles with a diameter of less than 10 micrometers (µm) that can penetrate the bronchial tubes). The orange level was therefore recommended for this 48-hour period.

After new measurements carried out this August 31, 2022 in the order of 44.3 μg/m3 at the Marigot station from midnight to 10:00 am, a decrease in concentrations of fine particles PM10 was therefore observed on the air quality monitoring network in Saint-Martin. Gwad’Air forecasts an average concentration of fine particles PM10 over 24 hours lower than the regulatory thresholds set for the protection of human health. Consequently, the green level is restored.

This September 1st, Gwad’Air forecasts a clear improvement of the air quality with a decrease of the concentrations of regulated air pollutants. The ATMO indices (daily air quality indicator calculated from air concentrations of regulated pollutants) should vary from “good” to “average” for the communes of Guadeloupe and should be “average” in Saint-Martin.

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