5 – 11 Oct 2022 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

62.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+0.2 AQI compared with the previous week’s mean of 62.3.

Highest hourly estimate: 149 in Hanoi · 6 Oct, 10:00 GMT+7.

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

Day	Mean AQI	Low–high	Mean PM2.5 (µg/m³)	City-hours
Wed, 5 Oct	59.1Moderate	19–128	16.1	192 / 192
Thu, 6 Oct	63.6Moderate	21–149	18	192 / 192
Fri, 7 Oct	65.7Moderate	32–140	17.9	192 / 192
Sat, 8 Oct	61.7Moderate	24–127	17.8	192 / 192
Sun, 9 Oct	62.1Moderate	21–123	16.8	192 / 192
Mon, 10 Oct	59.8Moderate	26–105	16	192 / 192
Tue, 11 Oct	65.3Moderate	25–103	19.8	192 / 192

Hourly means (UTC+7)

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

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	60	60	59	59	59	59	58	59	59	59	58	59	59	59	59	59	59	59	60	60	60	60	60	60
Thu	60	61	61	61	62	63	63	64	64	64	65	65	65	65	65	64	64	64	64	64	64	64	65	65
Fri	65	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	65	65	65
Sat	65	65	64	63	63	62	61	60	60	59	59	59	59	59	59	60	60	60	62	63	64	65	66	66
Sun	66	65	64	63	62	61	61	61	61	61	61	61	62	62	62	63	63	63	62	62	62	62	61	61
Mon	61	60	60	60	60	60	60	60	59	59	59	59	59	58	58	58	58	58	59	61	62	63	64	65
Tue	65	65	64	63	62	63	64	64	64	64	65	65	65	65	66	66	67	67	67	67	68	68	68	68

Cities by modelled US AQI

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

City	Mean AQI	Peak AQI	Mean PM2.5 (µg/m³)	Hours
Hanoi	108.6Unhealthy for Sensitive Groups	149	38	168 / 168
Hai Phong	80.9Moderate	125	24.9	168 / 168
Ho Chi Minh City	77.3Moderate	93	24	168 / 168
Can Tho	68.4Moderate	89	19.2	168 / 168
Hue	52.8Moderate	71	11.7	168 / 168
Da Nang	49.3Good	105	11.1	168 / 168
Nha Trang	35.3Good	45	6.3	168 / 168
Da Lat	27Good	37	4.8	168 / 168

City-hours by category

Good: 513

Moderate: 707

Unhealthy for Sensitive Groups: 124

Unhealthy: 0

Very Unhealthy: 0

Hazardous: 0

US AQI scale
AQI	Category
0–50	Good
51–100	Moderate
101–150	Unhealthy for Sensitive Groups
151–200	Unhealthy
201–300	Very 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.

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	60	60	59	59	59	59	58	59	59	59	58	59	59	59	59	59	59	59	60	60	60	60	60	60
Thu	60	61	61	61	62	63	63	64	64	64	65	65	65	65	65	64	64	64	64	64	64	64	65	65
Fri	65	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	65	65	65
Sat	65	65	64	63	63	62	61	60	60	59	59	59	59	59	59	60	60	60	62	63	64	65	66	66
Sun	66	65	64	63	62	61	61	61	61	61	61	61	62	62	62	63	63	63	62	62	62	62	61	61
Mon	61	60	60	60	60	60	60	60	59	59	59	59	59	58	58	58	58	58	59	61	62	63	64	65
Tue	65	65	64	63	62	63	64	64	64	64	65	65	65	65	66	66	67	67	67	67	68	68	68	68

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	60	60	59	59	59	59	58	59	59	59	58	59	59	59	59	59	59	59	60	60	60	60	60	60
Thu	60	61	61	61	62	63	63	64	64	64	65	65	65	65	65	64	64	64	64	64	64	64	65	65
Fri	65	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	65	65	65
Sat	65	65	64	63	63	62	61	60	60	59	59	59	59	59	59	60	60	60	62	63	64	65	66	66
Sun	66	65	64	63	62	61	61	61	61	61	61	61	62	62	62	63	63	63	62	62	62	62	61	61
Mon	61	60	60	60	60	60	60	60	59	59	59	59	59	58	58	58	58	58	59	61	62	63	64	65
Tue	65	65	64	63	62	63	64	64	64	64	65	65	65	65	66	66	67	67	67	67	68	68	68	68

Day	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
Wed	60	60	59	59	59	59	58	59	59	59	58	59	59	59	59	59	59	59	60	60	60	60	60	60
Thu	60	61	61	61	62	63	63	64	64	64	65	65	65	65	65	64	64	64	64	64	64	64	65	65
Fri	65	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	66	65	65	65
Sat	65	65	64	63	63	62	61	60	60	59	59	59	59	59	59	60	60	60	62	63	64	65	66	66
Sun	66	65	64	63	62	61	61	61	61	61	61	61	62	62	62	63	63	63	62	62	62	62	61	61
Mon	61	60	60	60	60	60	60	60	59	59	59	59	59	58	58	58	58	58	59	61	62	63	64	65
Tue	65	65	64	63	62	63	64	64	64	64	65	65	65	65	66	66	67	67	67	67	68	68	68	68