Les Cayes: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

Latest air quality data: Les Cayes

Locations: Port-au-Prince » Port-de-Paix » Croix-des-Bouquets » Jacmel » Cap-Haïtien » Léogâne » Les Cayes Petit Goâve »

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

particulate matter (PM2.5) dust - 32 (Moderate)
particulate matter (PM10) suspended dust - 52 (Unhealthy for Sensitive Groups)
ozone (O3) - 41 (Good)
nitrogen dioxide (NO2) - 8 (Good)
sulfur dioxide (SO2) - 3 (Good)
carbon monoxide (CO) - 275 (Good)

Real-time Air Quality Index (AQI) for Les Cayes, Wednesday, August 26, 2026: 3.

AQI 3 Unhealthy for Sensitive Groups

What is the air quality in Les Cayes today? Is the air polluted in Les Cayes?. Is there smog?

Today (Wednesday, August 26, 2026) air quality is moderately polluted in Les Cayes. Healthy people may experience slight irritations and sensitive persons will be slightly affected to a larger extent by the pollutions in Les Cayes.

What is the current level of PM2.5 in Les Cayes? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 32 (Moderate) For comparison, the highest level of PM2.5 in Les Cayes in the last 7 days was: 27 (Wednesday, August 26, 2026) and the lowest: 14 (Monday, August 24, 2026).

What is the level of PM10 today in Les Cayes? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Les Cayes is: 52 (Unhealthy for Sensitive Groups)

How is the O3 level today in Les Cayes? (ozone (O3))
41 (Good)

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

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

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

Current data Wednesday, August 26, 2026 at 9:00 PM

PM2,5 32 (Moderate)

PM10 52 (Unhealthy for Sensitive Groups)

O3 41 (Good)

NO2 8 (Good)

SO2 3 (Good)

CO 275 (Good)

Data on air pollution from recent days in Les Cayes

index	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20	2026-08-19
pm25	27 Moderate	17 Moderate	14 Moderate	16 Moderate	22 Moderate	22 Moderate	17 Moderate	19 Moderate
pm10	41 Moderate	26 Moderate	20 Moderate	24 Moderate	40 Moderate	43 Moderate	25 Moderate	27 Moderate
o3	56 Good	42 Good	46 Good	49 Good	50 Good	50 Good	51 Good	57 Good
no2	5 Good	4 Good	3 Good	2 Good	3 Good	4 Good	4 Good	3 Good
so2	3 Good	2 Good	2 Good	2 Good	1 Good	2 Good	2 Good	2 Good
co	242 Good	202 Good	195 Good	164 Good	194 Good	171 Good	162 Good	193 Good

data source »

Les Cayes

Wednesday, August 26, 2026 at 9:00 PM

PM2,5 32 (Moderate)

particulate matter (PM2.5) dust

PM10 52 (Unhealthy for Sensitive Groups)

particulate matter (PM10) suspended dust

O3 41 (Good)

ozone (O3)

NO2 7.9 (Good)

nitrogen dioxide (NO2)

SO2 2.5 (Good)

sulfur dioxide (SO2)

CO 275 (Good)

carbon monoxide (CO)

Les Cayes

index	2026-08-19	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26
pm25	19	17	22	22	16	14	17	27
pm10	27	25	43	40	24	20	26	41
o3	57	51	50	50	49	46	42	56
no2	3.4	3.8	4	2.9	2.1	2.8	3.9	4.9
so2	2	2	2	1.3	1.8	2	2.3	2.7
co	193	162	171	194	164	195	202	242

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

🌦️ Weather · 16-day Forecast — Haiti

16-day weather forecast for Haiti: today around 33°C (rain), lows near 23°C. Daily temperature and conditions, updated every day. A moderate breeze (about 15 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — Haiti

The UV index in Haiti today is 8.7 (very high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Les Cayes — compare nearby locations.

Port-au-Prince 60 µg/m³
Port-de-Paix 12 µg/m³
Croix-des-Bouquets 60 µg/m³
Jacmel 60 µg/m³
Cap-Haïtien 16 µg/m³
Léogâne 43 µg/m³
Petit Goâve 43 µg/m³

Frequently asked questions

Is the air safe to breathe in Les Cayes today?

The current average PM2.5 across Les Cayes is about 32 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 Les Cayes?

Right now PM2.5 in Les Cayes averages about 32 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 Les Cayes?

Over the past week, the highest daily PM2.5 in Les Cayes was recorded on Wednesday, August 26 (about 27 µg/m³).

What is the UV index in Les Cayes today?

The UV index in Les Cayes today is 8.7 (very high) — unprotected fair skin can burn in about 25 minutes.

Does today's wind help disperse smog in Les Cayes?

A moderate breeze (about 15 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.