What is the air quality trend in Saint-Louis?

Over the past 8 days, Saint-Louis had an average AQI of 45 based on station measurements. The worst day was 2026-08-03 with AQI 58.

How is Saint-Louis air quality measured?

Air quality in Saint-Louis is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Saint-Louis, Réunion

Name: Saint-Louis Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Saint-Louis, Réunion.

Current AQI
Good CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

163h

PM2.5 Station

163h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-08-08	41	16–56	10.2 µg/m³	6h	13
2026-08-07	36	20–59	8.8 µg/m³	22h	10
2026-08-06	43	20–68	11.1 µg/m³	24h	14
2026-08-05	47	34–90	12.0 µg/m³	24h	12
2026-08-04	47	26–91	12.1 µg/m³	24h	12
2026-08-03	58	25–299	23.6 µg/m³	24h	12
2026-08-02	46	19–117	11.7 µg/m³	23h	12
2026-08-01	49	20–104	13.6 µg/m³	16h	9

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