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

Latest air quality data: Hanoi

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

particulate matter (PM2.5) dust - 29 (Moderate)
particulate matter (PM10) suspended dust - 30 (Moderate)
ozone (O3) - 88 (Moderate)
nitrogen dioxide (NO2) - 29 (Good)
sulfur dioxide (SO2) - 19 (Good)
carbon monoxide (CO) - 907 (Good)

Real-time Air Quality Index (AQI) for Hanoi, Thursday, August 27, 2026: 2.

AQI 2 Moderate

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

Today (Thursday, August 27, 2026) air quality is moderate in Hanoi. Some pollutants in Hanoi may slightly affect very few hypersensitive individuals. Air pollutants in Hanoi may cause minor breathing discomfort to sensitive people.

What is the current level of PM2.5 in Hanoi? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 29 (Moderate) For comparison, the highest level of PM2.5 in Hanoi in the last 7 days was: 52 (Wednesday, August 26, 2026) and the lowest: 24 (Monday, August 24, 2026).

What is the level of PM10 today in Hanoi? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Hanoi is: 30 (Moderate)

How is the O3 level today in Hanoi? (ozone (O3))
88 (Moderate)

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

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

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

Current data Thursday, August 27, 2026 at 8:00 AM

PM2,5 29 (Moderate)

PM10 30 (Moderate)

O3 88 (Moderate)

NO2 29 (Good)

SO2 19 (Good)

CO 907 (Good)

Data on air pollution from recent days in Hanoi

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	43 Unhealthy for Sensitive Groups	52 Unhealthy for Sensitive Groups	38 Unhealthy for Sensitive Groups	24 Moderate	30 Moderate	29 Moderate	35 Unhealthy for Sensitive Groups	32 Moderate
pm10	44 Moderate	53 Unhealthy for Sensitive Groups	38 Moderate	24 Moderate	30 Moderate	29 Moderate	35 Moderate	32 Moderate
o3	110 Moderate	84 Moderate	104 Moderate	92 Moderate	66 Good	61 Good	62 Good	94 Moderate
no2	30 Good	41 Moderate	25 Good	17 Good	22 Good	28 Good	34 Good	27 Good
so2	21 Good	29 Good	18 Good	12 Good	12 Good	12 Good	17 Good	19 Good
co	1244 Good	1706 Good	794 Good	646 Good	661 Good	667 Good	841 Good	692 Good

data source »

Hanoi

Thursday, August 27, 2026 at 8:00 AM

PM2,5 29 (Moderate)

particulate matter (PM2.5) dust

PM10 30 (Moderate)

particulate matter (PM10) suspended dust

O3 88 (Moderate)

ozone (O3)

NO2 29 (Good)

nitrogen dioxide (NO2)

SO2 19 (Good)

sulfur dioxide (SO2)

CO 907 (Good)

carbon monoxide (CO)

Hanoi

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	32	35	29	30	24	38	52	43
pm10	32	35	29	30	24	38	53	44
o3	94	62	61	66	92	104	84	110
no2	27	34	28	22	17	25	41	30
so2	19	17	12	12	12	18	29	21
co	692	841	667	661	646	794	1706	1244

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

🌦️ Weather · 16-day Forecast — Hanoi

16-day weather forecast for Hanoi: today around 35°C (rain), lows near 25°C. Daily temperature and conditions, updated every day. A moderate breeze (about 14 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — Hanoi

The UV index in Hanoi today is 8.3 (very high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Hanoi — compare nearby locations.

Haiphong 21 µg/m³
Vinh 37 µg/m³
Ho Chi Minh City 26 µg/m³
Takéo Province 9 µg/m³
Da Nang 5 µg/m³
Wenshan City 5 µg/m³
Biên Hòa 26 µg/m³
Huế 16 µg/m³

Frequently asked questions

Is the air safe to breathe in Hanoi today?

The current average PM2.5 across Hanoi is about 29 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 Hanoi?

Right now PM2.5 in Hanoi averages about 29 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 Hanoi?

Over the past week, the highest daily PM2.5 in Hanoi was recorded on Wednesday, August 26 (about 52 µg/m³).

What is the UV index in Hanoi today?

The UV index in Hanoi today is 8.3 (very high) — unprotected fair skin can burn in about 25 minutes.

Does today's wind help disperse smog in Hanoi?

A moderate breeze (about 14 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.