4 – 10 Oct 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

64.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 15.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-5.4 AQI compared with the previous week’s mean of 70.

Highest hourly estimate: 165 in Da Nang · 6 Oct, 17:00 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, 4 Oct	63.1Moderate	33–148	15.5	192 / 192
Thu, 5 Oct	65.6Moderate	32–133	17.9	192 / 192
Fri, 6 Oct	72.3Moderate	34–165	19.1	192 / 192
Sat, 7 Oct	72.3Moderate	45–134	20.1	192 / 192
Sun, 8 Oct	64.2Moderate	38–102	13.2	192 / 192
Mon, 9 Oct	57.3Moderate	33–103	13.4	192 / 192
Tue, 10 Oct	57.7Moderate	29–85	12.4	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	65	65	64	64	63	63	62	61	61	60	60	61	61	61	61	62	64	66	68	68	66	65	63	61
Thu	60	59	60	60	60	61	61	62	63	63	63	63	63	64	67	71	73	76	77	76	73	70	67	65
Fri	65	65	66	66	66	66	66	66	66	66	67	67	68	71	74	77	79	83	87	88	86	80	77	74
Sat	72	71	70	69	69	69	69	68	69	69	70	70	70	71	74	76	78	80	82	81	76	72	71	71
Sun	71	70	70	70	69	69	68	68	67	66	65	64	64	63	62	61	61	61	61	61	59	58	58	57
Mon	56	56	55	55	54	54	53	53	53	54	54	55	55	57	58	60	62	63	63	63	62	61	61	60
Tue	59	59	58	58	57	57	57	57	57	57	56	57	56	57	58	58	59	60	60	59	59	58	57	57

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	94.3Moderate	148	27.6	168 / 168
Hai Phong	80.4Moderate	128	22.9	168 / 168
Ho Chi Minh City	80.2Moderate	113	24.8	168 / 168
Da Nang	68.4Moderate	165	13	168 / 168
Hue	55.1Moderate	85	12	168 / 168
Nha Trang	50.4Moderate	95	8.9	168 / 168
Can Tho	49.5Good	71	11.6	168 / 168
Da Lat	38.7Good	49	6.8	168 / 168

City-hours by category

Good: 457

Moderate: 754

Unhealthy for Sensitive Groups: 129

Unhealthy: 4

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	65	65	64	64	63	63	62	61	61	60	60	61	61	61	61	62	64	66	68	68	66	65	63	61
Thu	60	59	60	60	60	61	61	62	63	63	63	63	63	64	67	71	73	76	77	76	73	70	67	65
Fri	65	65	66	66	66	66	66	66	66	66	67	67	68	71	74	77	79	83	87	88	86	80	77	74
Sat	72	71	70	69	69	69	69	68	69	69	70	70	70	71	74	76	78	80	82	81	76	72	71	71
Sun	71	70	70	70	69	69	68	68	67	66	65	64	64	63	62	61	61	61	61	61	59	58	58	57
Mon	56	56	55	55	54	54	53	53	53	54	54	55	55	57	58	60	62	63	63	63	62	61	61	60
Tue	59	59	58	58	57	57	57	57	57	57	56	57	56	57	58	58	59	60	60	59	59	58	57	57

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	65	65	64	64	63	63	62	61	61	60	60	61	61	61	61	62	64	66	68	68	66	65	63	61
Thu	60	59	60	60	60	61	61	62	63	63	63	63	63	64	67	71	73	76	77	76	73	70	67	65
Fri	65	65	66	66	66	66	66	66	66	66	67	67	68	71	74	77	79	83	87	88	86	80	77	74
Sat	72	71	70	69	69	69	69	68	69	69	70	70	70	71	74	76	78	80	82	81	76	72	71	71
Sun	71	70	70	70	69	69	68	68	67	66	65	64	64	63	62	61	61	61	61	61	59	58	58	57
Mon	56	56	55	55	54	54	53	53	53	54	54	55	55	57	58	60	62	63	63	63	62	61	61	60
Tue	59	59	58	58	57	57	57	57	57	57	56	57	56	57	58	58	59	60	60	59	59	58	57	57

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	65	65	64	64	63	63	62	61	61	60	60	61	61	61	61	62	64	66	68	68	66	65	63	61
Thu	60	59	60	60	60	61	61	62	63	63	63	63	63	64	67	71	73	76	77	76	73	70	67	65
Fri	65	65	66	66	66	66	66	66	66	66	67	67	68	71	74	77	79	83	87	88	86	80	77	74
Sat	72	71	70	69	69	69	69	68	69	69	70	70	70	71	74	76	78	80	82	81	76	72	71	71
Sun	71	70	70	70	69	69	68	68	67	66	65	64	64	63	62	61	61	61	61	61	59	58	58	57
Mon	56	56	55	55	54	54	53	53	53	54	54	55	55	57	58	60	62	63	63	63	62	61	61	60
Tue	59	59	58	58	57	57	57	57	57	57	56	57	56	57	58	58	59	60	60	59	59	58	57	57