Air Quality in Saint-Louis Today — Live AQI, PM2.5 & PM10, Smog, Weather and Forecast

Latest air quality data: Saint-Louis

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Pollution and air quality forecast for Saint-Louis. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Saint-Louis:

particulate matter (PM2.5) dust - 24 (Moderate)
particulate matter (PM10) suspended dust - 56 (Unhealthy for Sensitive Groups)
ozone (O3) - 60 (Good)
nitrogen dioxide (NO2) - 1 (Good)
sulfur dioxide (SO2) - 1 (Good)
carbon monoxide (CO) - 97 (Good)

Real-time Air Quality Index (AQI) for Saint-Louis, Thursday, August 27, 2026: 3.

AQI 3 Unhealthy for Sensitive Groups

What is the air quality in Saint-Louis today? Is the air polluted in Saint-Louis?. Is there smog?

Today (Thursday, August 27, 2026) air quality is moderately polluted in Saint-Louis. Healthy people may experience slight irritations and sensitive persons will be slightly affected to a larger extent by the pollutions in Saint-Louis.

What is the current level of PM2.5 in Saint-Louis? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 24 (Moderate) For comparison, the highest level of PM2.5 in Saint-Louis in the last 7 days was: 41 (Thursday, August 27, 2026) and the lowest: 7 (Wednesday, August 26, 2026).

What is the level of PM10 today in Saint-Louis? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Saint-Louis is: 56 (Unhealthy for Sensitive Groups)

How is the O3 level today in Saint-Louis? (ozone (O3))
60 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
1 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
1 (Good)

How high is the CO level? (carbon monoxide (CO))
97 (Good)

Current data Thursday, August 27, 2026 at 1:00 AM

PM2,5 24 (Moderate)

PM10 56 (Unhealthy for Sensitive Groups)

O3 60 (Good)

NO2 1 (Good)

SO2 1 (Good)

CO 97 (Good)

Data on air pollution from recent days in Saint-Louis

index	2026-08-27	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20
pm25	41 Unhealthy for Sensitive Groups	7 Good	17 Moderate	41 Unhealthy for Sensitive Groups	29 Moderate	17 Moderate	19 Moderate	25 Moderate
pm10	159 Very bad Hazardous	13 Good	39 Moderate	103 Unhealthy	80 Unhealthy	40 Moderate	52 Unhealthy for Sensitive Groups	56 Unhealthy for Sensitive Groups
o3	66 Good	70 Moderate	74 Moderate	58 Good	52 Good	63 Good	72 Moderate	65 Good
no2	1 Good	1 Good	2 Good	1 Good	1 Good	1 Good	1 Good	1 Good
so2	1 Good	1 Good	1 Good	1 Good	1 Good	2 Good	1 Good	1 Good
co	98 Good	115 Good	127 Good	105 Good	103 Good	114 Good	96 Good	99 Good

data source »

Saint-Louis

Thursday, August 27, 2026 at 1:00 AM

PM2,5 24 (Moderate)

particulate matter (PM2.5) dust

PM10 56 (Unhealthy for Sensitive Groups)

particulate matter (PM10) suspended dust

O3 60 (Good)

ozone (O3)

NO2 0.9 (Good)

nitrogen dioxide (NO2)

SO2 0.6 (Good)

sulfur dioxide (SO2)

CO 97 (Good)

carbon monoxide (CO)

Saint-Louis

index	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26	2026-08-27
pm25	25	19	17	29	41	17	7.2	41
pm10	56	52	40	80	103	39	13	159
o3	65	72	63	52	58	74	70	66
no2	0.87	0.63	1.1	0.65	0.87	1.9	0.67	0.79
so2	0.72	1.2	1.9	0.57	0.6	1.4	0.91	0.58
co	99	96	114	103	105	127	115	98

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Senegal

16-day weather forecast for Senegal: today around 33°C (rain), lows near 25°C. Daily temperature and conditions, updated every day. A moderate breeze (about 17 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — Senegal

The UV index in Senegal today is 8.2 (very high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Saint-Louis — compare nearby locations.

Dakar 12 µg/m³
Touba 5 µg/m³
Thiès Nones 8 µg/m³
Kaolack 4 µg/m³
Ziguinchor 8 µg/m³
Tiébo 6 µg/m³

Frequently asked questions

Is the air safe to breathe in Saint-Louis today?

The current average PM2.5 across Saint-Louis is about 24 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Saint-Louis?

Right now PM2.5 in Saint-Louis averages about 24 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Saint-Louis?

Over the past week, the highest daily PM2.5 in Saint-Louis was recorded on Thursday, August 27 (about 41 µg/m³).

What is the UV index in Saint-Louis today?

The UV index in Saint-Louis today is 8.2 (very high) — unprotected fair skin can burn in about 25 minutes.

Does today's wind help disperse smog in Saint-Louis?

A moderate breeze (about 17 km/h) is partially dispersing pollutants today.

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.