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· Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

73.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 19 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+2 AQI compared with the previous week’s mean of 71.5.

Highest hourly estimate: 243 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

5010073Wed67Thu65Fri67Sat75Sun80Mon87Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 15 May72.6Moderate49–14915.7192 / 192
Thu, 16 May67.1Moderate44–15515.2192 / 192
Fri, 17 May64.7Moderate39–14014.9192 / 192
Sat, 18 May67.4Moderate43–15217.6192 / 192
Sun, 19 May75.4Moderate39–24320.3192 / 192
Mon, 20 May80.2Moderate50–17021.8192 / 192
Tue, 21 May87.3Moderate50–18027.8192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed807978777675747473727170696970727779777368646363
Thu626262626261616161606061606266717883848379746967
Fri666564636262636363636262626164687073747166636161
Sat616161616161616162626363646569748083838177736866
Sun666666666666656565646469727478818692959491898682
Mon797673737474757575767676767677808895979590858382
Tue7976757778798081828485868789939510010410410196928887

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
Hanoi105.7Unhealthy for Sensitive Groups18035.8168 / 168
Da Nang90.5Moderate24319.6168 / 168
Hai Phong88.8Moderate17424.3168 / 168
Hue71.3Moderate13118.4168 / 168
Ho Chi Minh City66.5Moderate8518.7168 / 168
Can Tho60.8Moderate7714.5168 / 168
Nha Trang52.3Moderate7610.6168 / 168
Da Lat52.3Moderate6710.5168 / 168

City-hours by category

Good: 135

Moderate: 1025

Unhealthy for Sensitive Groups: 142

Unhealthy: 34

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.