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· Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

77.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 21 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+12.5 AQI compared with the previous week’s mean of 64.9.

Highest hourly estimate: 207 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

5010085Wed91Thu73Fri63Sat71Sun82Mon77Tue
DayMean AQILow–highMean PM2.5 (µg/m³)City-hours
Wed, 25 Sep85.3Moderate50–16627.6192 / 192
Thu, 26 Sep90.9Moderate49–20628192 / 192
Fri, 27 Sep73.1Moderate32–16117.1192 / 192
Sat, 28 Sep63.3Moderate35–10415.6192 / 192
Sun, 29 Sep70.5Moderate45–18420.1192 / 192
Mon, 30 Sep81.6Moderate53–20021192 / 192
Tue, 1 Oct77.1Moderate49–20717.3192 / 192

Hourly means (UTC+7)

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

Day01234567891011121314151617181920212223
Wed858484848383828282818182838486889193939288878585
Thu858687878889909192929393929292929497979694918887
Fri868584828179777573727170696968686970717069666363
Sat636363636362626261616161616161646871716966626262
Sun626262626262626162636364646772768286908885817977
Mon76757473747475757575757474778185939910110197928580
Tue787674727272717171717171707478818588908887848177

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
Hanoi112Unhealthy for Sensitive Groups20638.5168 / 168
Hai Phong90Moderate16026.8168 / 168
Da Nang86.7Moderate20718.3168 / 168
Ho Chi Minh City81.2Moderate10924168 / 168
Hue71Moderate14817.6168 / 168
Can Tho65.5Moderate9616.3168 / 168
Nha Trang59.6Moderate12014.2168 / 168
Da Lat53.2Moderate6312168 / 168

City-hours by category

Good: 109

Moderate: 1015

Unhealthy for Sensitive Groups: 133

Unhealthy: 80

Very Unhealthy: 7

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.