haze

· Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

Modelled US AQI · 8 cities · CAMS via Open-Meteo

74.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 21.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-5.9 AQI compared with the previous week’s mean of 80.3.

Highest hourly estimate: 234 in Da Nang · .

1344 of 1344 city-hours have a modelled AQI. These are estimates for roughly 45 km model grid cells, not monitoring-station measurements. How this report is made

Daily modelled US AQI

5010069Wed66Thu65Fri81Sat95Sun74Mon71Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 17 Sep68.8Moderate35–13518.1192 / 192
Thu, 18 Sep65.8Moderate24–15118.6192 / 192
Fri, 19 Sep65.4Moderate23–15218.5192 / 192
Sat, 20 Sep81.2Moderate24–17028.1192 / 192
Sun, 21 Sep95Moderate34–23426192 / 192
Mon, 22 Sep74.1Moderate19–16219.3192 / 192
Tue, 23 Sep70.8Moderate16–15620.7192 / 192

Hourly means (UTC+7)

Each cell averages the selected cities’ modelled AQI for that hour.

Day01234567891011121314151617181920212223
Wed717171706969686868686868686868686970707069686767
Thu676766666666656565646464646565666668686868676665
Fri666565646363626262626262626263666972747472706666
Sat676870717274767880808181818282828589929393929090
Sun8988888787868685848383899395100104106110111111108105103100
Mon969186827976737271717170707069707172737370686868
Tue686868686869696969707070717172727374767675737272

Cities by modelled US AQI

Sorted by weekly mean. Each city is a single model grid cell near its centre.

CityMean AQIPeak AQIMean PM2.5 (µg/m³)Hours
Hanoi146.2Unhealthy for Sensitive Groups17057.2168 / 168
Hai Phong94.8Moderate14733168 / 168
Ho Chi Minh City90.4Moderate12029.8168 / 168
Da Nang63.3Moderate2349.3168 / 168
Hue60.3Moderate10013.8168 / 168
Nha Trang55.9Moderate8710.7168 / 168
Can Tho54Moderate6111.6168 / 168
Da Lat30.5Good515.1168 / 168

City-hours by category

Good: 283

Moderate: 763

Unhealthy for Sensitive Groups: 221

Unhealthy: 69

Very Unhealthy: 8

Hazardous: 0

US AQI scale
AQICategory
0–50Good
51–100Moderate
101–150Unhealthy for Sensitive Groups
151–200Unhealthy
201–300Very Unhealthy
301+Hazardous

How this report is made

Open-Meteo provides hourly estimates from the Copernicus Atmosphere Monitoring Service (CAMS) global model at roughly 45 km resolution. We use the grid cell nearest each city’s centre. Nearby places may share a cell, and local pollution can differ.

The AQI is the provider’s modelled US AQI across pollutants, one value per city per hour. Weekly, daily and hourly means average those values across the selected cities. PM2.5 is a concentration in µg/m³. These figures use a different basis from the measured PM2.5-derived AQI in the Malaysia and Singapore reports.

Days and hours use UTC+7. The report includes past model hours only, never forecasts. The previous-week comparison appears only when at least 90% of that week’s city-hours are available.

For official local readings and advice, visit Centre for Environmental Monitoring. Air-quality data: Open-Meteo and CAMS, licensed under CC BY 4.0. Haze Monitor is independent of these providers and local authorities.