haze

· Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

77Weekly mean modelled AQI · Moderate

Mean PM2.5: 21.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-4.1 AQI compared with the previous week’s mean of 81.1.

Highest hourly estimate: 181 in Hanoi · .

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

5010079Wed85Thu87Fri79Sat76Sun68Mon65Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 11 Mar78.9Moderate35–17925.1192 / 192
Thu, 12 Mar85Moderate31–18128.9192 / 192
Fri, 13 Mar86.6Moderate38–17724.2192 / 192
Sat, 14 Mar79.3Moderate38–15520.5192 / 192
Sun, 15 Mar75.8Moderate35–12920192 / 192
Mon, 16 Mar67.6Moderate31–12415.9192 / 192
Tue, 17 Mar65.4Moderate35–9816.5192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed686869696970707172737475757677788694989997948983
Thu808080818181828283838384848585868793969592888585
Fri848585858686868686868685858484848793969691878482
Sat818080807979787776757575767778798188908983787574
Sun737372727272717172727274767879808387878479757372
Mon717069696867666665656565666768687073747269666362
Tue626262626262626262626363636364667175777673686564

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
Hanoi128.5Unhealthy for Sensitive Groups18152.4168 / 168
Ho Chi Minh City86.3Moderate17922.4168 / 168
Hai Phong85.1Moderate14926.5168 / 168
Can Tho82.1Moderate16923.1168 / 168
Da Nang73.3Moderate12214.6168 / 168
Hue64.4Moderate8915.5168 / 168
Nha Trang54.7Moderate6611.6168 / 168
Da Lat41.3Good566.7168 / 168

City-hours by category

Good: 154

Moderate: 969

Unhealthy for Sensitive Groups: 157

Unhealthy: 64

Very Unhealthy: 0

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.