18 – 24 Oct 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

71.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 19.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+8.6 AQI compared with the previous week’s mean of 63.2.

Highest hourly estimate: 220 in Da Nang · 19 Oct, 19:00 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, 18 Oct	73.8Moderate	38–157	20.8	192 / 192
Thu, 19 Oct	86.4Moderate	38–220	22.3	192 / 192
Fri, 20 Oct	78.1Moderate	52–170	19	192 / 192
Sat, 21 Oct	62.7Moderate	36–101	14.1	192 / 192
Sun, 22 Oct	61.7Moderate	23–115	16.8	192 / 192
Mon, 23 Oct	65.5Moderate	26–146	21.1	192 / 192
Tue, 24 Oct	74.7Moderate	27–163	22.8	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	76	74	73	73	73	73	73	73	72	72	72	72	72	72	72	73	75	79	81	79	76	74	73	71
Thu	71	71	72	72	73	73	74	74	75	75	76	76	82	83	87	94	102	109	115	115	111	105	97	92
Fri	87	81	76	74	74	73	73	74	74	74	74	74	73	73	76	80	85	88	89	87	83	80	77	74
Sat	72	70	68	67	67	66	65	64	63	62	62	62	61	61	61	60	60	59	60	60	60	59	59	58
Sun	58	58	58	58	58	58	58	58	58	58	58	59	60	61	61	63	67	71	74	73	68	65	61	61
Mon	61	62	62	63	63	63	63	63	64	64	64	64	64	64	65	65	66	69	72	72	71	69	69	70
Tue	70	71	71	72	73	73	74	75	75	75	75	75	74	73	73	73	76	81	84	84	80	75	72	71

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	109.9Unhealthy for Sensitive Groups	163	39.5	168 / 168
Ho Chi Minh City	98.3Moderate	150	33.1	168 / 168
Can Tho	75.2Moderate	130	22.1	168 / 168
Hai Phong	70.4Moderate	103	18.9	168 / 168
Da Nang	67.3Moderate	220	12.6	168 / 168
Nha Trang	55.9Moderate	115	10.6	168 / 168
Hue	55Moderate	127	11.8	168 / 168
Da Lat	42.7Good	58	7.9	168 / 168

City-hours by category

Good: 361

Moderate: 772

Unhealthy for Sensitive Groups: 141

Unhealthy: 64

Very Unhealthy: 6

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	76	74	73	73	73	73	73	73	72	72	72	72	72	72	72	73	75	79	81	79	76	74	73	71
Thu	71	71	72	72	73	73	74	74	75	75	76	76	82	83	87	94	102	109	115	115	111	105	97	92
Fri	87	81	76	74	74	73	73	74	74	74	74	74	73	73	76	80	85	88	89	87	83	80	77	74
Sat	72	70	68	67	67	66	65	64	63	62	62	62	61	61	61	60	60	59	60	60	60	59	59	58
Sun	58	58	58	58	58	58	58	58	58	58	58	59	60	61	61	63	67	71	74	73	68	65	61	61
Mon	61	62	62	63	63	63	63	63	64	64	64	64	64	64	65	65	66	69	72	72	71	69	69	70
Tue	70	71	71	72	73	73	74	75	75	75	75	75	74	73	73	73	76	81	84	84	80	75	72	71

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	76	74	73	73	73	73	73	73	72	72	72	72	72	72	72	73	75	79	81	79	76	74	73	71
Thu	71	71	72	72	73	73	74	74	75	75	76	76	82	83	87	94	102	109	115	115	111	105	97	92
Fri	87	81	76	74	74	73	73	74	74	74	74	74	73	73	76	80	85	88	89	87	83	80	77	74
Sat	72	70	68	67	67	66	65	64	63	62	62	62	61	61	61	60	60	59	60	60	60	59	59	58
Sun	58	58	58	58	58	58	58	58	58	58	58	59	60	61	61	63	67	71	74	73	68	65	61	61
Mon	61	62	62	63	63	63	63	63	64	64	64	64	64	64	65	65	66	69	72	72	71	69	69	70
Tue	70	71	71	72	73	73	74	75	75	75	75	75	74	73	73	73	76	81	84	84	80	75	72	71

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	76	74	73	73	73	73	73	73	72	72	72	72	72	72	72	73	75	79	81	79	76	74	73	71
Thu	71	71	72	72	73	73	74	74	75	75	76	76	82	83	87	94	102	109	115	115	111	105	97	92
Fri	87	81	76	74	74	73	73	74	74	74	74	74	73	73	76	80	85	88	89	87	83	80	77	74
Sat	72	70	68	67	67	66	65	64	63	62	62	62	61	61	61	60	60	59	60	60	60	59	59	58
Sun	58	58	58	58	58	58	58	58	58	58	58	59	60	61	61	63	67	71	74	73	68	65	61	61
Mon	61	62	62	63	63	63	63	63	64	64	64	64	64	64	65	65	66	69	72	72	71	69	69	70
Tue	70	71	71	72	73	73	74	75	75	75	75	75	74	73	73	73	76	81	84	84	80	75	72	71