21 – 27 Feb 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

58.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 13.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-4.8 AQI compared with the previous week’s mean of 63.7.

Highest hourly estimate: 136 in Hue · 21 Feb, 18:00 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, 21 Feb	65.1Moderate	52–136	15.9	192 / 192
Thu, 22 Feb	64Moderate	50–135	14.4	192 / 192
Fri, 23 Feb	59.8Moderate	45–82	13.5	192 / 192
Sat, 24 Feb	55.4Moderate	38–74	11.8	192 / 192
Sun, 25 Feb	55.7Moderate	31–70	13.3	192 / 192
Mon, 26 Feb	57.4Moderate	27–96	14	192 / 192
Tue, 27 Feb	54.9Moderate	23–91	11.9	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	63	63	62	63	62	62	62	62	62	63	63	63	63	63	63	63	67	74	77	76	72	67	64	63
Thu	63	63	63	63	63	63	63	63	63	63	62	62	62	62	62	62	68	72	73	71	68	64	61	60
Fri	60	60	60	60	60	61	61	61	61	61	61	61	60	60	60	59	60	59	59	59	59	59	59	58
Sat	58	58	57	57	57	56	56	56	56	55	55	55	55	55	55	54	54	54	54	54	54	54	54	55
Sun	54	54	54	54	55	55	55	55	55	55	56	56	56	56	56	56	56	57	58	57	57	57	57	57
Mon	57	57	57	57	57	56	56	56	57	57	57	57	58	58	58	58	58	58	59	58	58	58	58	58
Tue	58	58	57	57	57	57	56	56	56	55	55	54	54	54	54	54	54	54	54	54	54	54	54	53

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	77Moderate	120	22.6	168 / 168
Hue	68.6Moderate	136	16.2	168 / 168
Hai Phong	61.7Moderate	69	15.5	168 / 168
Da Nang	58.5Moderate	90	12.8	168 / 168
Ho Chi Minh City	56.3Moderate	70	12.4	168 / 168
Can Tho	53.4Moderate	59	10.6	168 / 168
Nha Trang	52.2Moderate	57	10.2	168 / 168
Da Lat	43.5Good	62	8.2	168 / 168

City-hours by category

Good: 178

Moderate: 1151

Unhealthy for Sensitive Groups: 15

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	63	63	62	63	62	62	62	62	62	63	63	63	63	63	63	63	67	74	77	76	72	67	64	63
Thu	63	63	63	63	63	63	63	63	63	63	62	62	62	62	62	62	68	72	73	71	68	64	61	60
Fri	60	60	60	60	60	61	61	61	61	61	61	61	60	60	60	59	60	59	59	59	59	59	59	58
Sat	58	58	57	57	57	56	56	56	56	55	55	55	55	55	55	54	54	54	54	54	54	54	54	55
Sun	54	54	54	54	55	55	55	55	55	55	56	56	56	56	56	56	56	57	58	57	57	57	57	57
Mon	57	57	57	57	57	56	56	56	57	57	57	57	58	58	58	58	58	58	59	58	58	58	58	58
Tue	58	58	57	57	57	57	56	56	56	55	55	54	54	54	54	54	54	54	54	54	54	54	54	53

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	63	63	62	63	62	62	62	62	62	63	63	63	63	63	63	63	67	74	77	76	72	67	64	63
Thu	63	63	63	63	63	63	63	63	63	63	62	62	62	62	62	62	68	72	73	71	68	64	61	60
Fri	60	60	60	60	60	61	61	61	61	61	61	61	60	60	60	59	60	59	59	59	59	59	59	58
Sat	58	58	57	57	57	56	56	56	56	55	55	55	55	55	55	54	54	54	54	54	54	54	54	55
Sun	54	54	54	54	55	55	55	55	55	55	56	56	56	56	56	56	56	57	58	57	57	57	57	57
Mon	57	57	57	57	57	56	56	56	57	57	57	57	58	58	58	58	58	58	59	58	58	58	58	58
Tue	58	58	57	57	57	57	56	56	56	55	55	54	54	54	54	54	54	54	54	54	54	54	54	53

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	63	63	62	63	62	62	62	62	62	63	63	63	63	63	63	63	67	74	77	76	72	67	64	63
Thu	63	63	63	63	63	63	63	63	63	63	62	62	62	62	62	62	68	72	73	71	68	64	61	60
Fri	60	60	60	60	60	61	61	61	61	61	61	61	60	60	60	59	60	59	59	59	59	59	59	58
Sat	58	58	57	57	57	56	56	56	56	55	55	55	55	55	55	54	54	54	54	54	54	54	54	55
Sun	54	54	54	54	55	55	55	55	55	55	56	56	56	56	56	56	56	57	58	57	57	57	57	57
Mon	57	57	57	57	57	56	56	56	57	57	57	57	58	58	58	58	58	58	59	58	58	58	58	58
Tue	58	58	57	57	57	57	56	56	56	55	55	54	54	54	54	54	54	54	54	54	54	54	54	53