4 – 10 Mar 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

81.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+2.4 AQI compared with the previous week’s mean of 78.7.

Highest hourly estimate: 174 in Hanoi · 6 Mar, 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 Mar	76.3Moderate	52–100	21.1	192 / 192
Thu, 5 Mar	82.9Moderate	49–165	28	192 / 192
Fri, 6 Mar	86.9Moderate	38–174	31.3	192 / 192
Sat, 7 Mar	96.6Moderate	30–169	31.7	192 / 192
Sun, 8 Mar	89.2Moderate	51–161	23.8	192 / 192
Mon, 9 Mar	71.2Moderate	28–155	17.2	192 / 192
Tue, 10 Mar	64.7Moderate	29–105	18.5	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	81	81	81	81	80	79	78	78	78	77	77	77	77	76	76	75	75	74	74	72	72	71	72	72
Thu	73	74	76	77	78	80	81	82	84	85	85	85	86	86	86	86	86	86	86	86	86	86	85	85
Fri	84	84	83	83	83	83	83	83	83	83	84	84	84	85	86	87	89	94	97	97	96	93	90	90
Sat	90	90	91	92	93	94	95	96	96	97	97	98	98	99	99	99	100	101	103	103	100	97	97	96
Sun	96	95	94	93	92	90	89	87	86	86	85	85	85	85	85	85	88	95	98	97	94	89	83	80
Mon	79	78	76	75	74	73	72	70	70	69	68	68	67	68	67	68	70	74	77	76	73	69	66	64
Tue	64	63	63	63	63	63	63	63	63	63	63	63	63	62	62	63	65	67	71	72	69	67	67	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	122.4Unhealthy for Sensitive Groups	174	47.5	168 / 168
Can Tho	110.5Unhealthy for Sensitive Groups	158	37.7	168 / 168
Ho Chi Minh City	96.6Moderate	161	32.1	168 / 168
Hai Phong	85.4Moderate	115	26.1	168 / 168
Da Nang	65.1Moderate	91	14.9	168 / 168
Hue	63.9Moderate	80	16.5	168 / 168
Nha Trang	54.4Moderate	66	11.7	168 / 168
Da Lat	50.5Moderate	70	9.6	168 / 168

City-hours by category

Good: 168

Moderate: 883

Unhealthy for Sensitive Groups: 220

Unhealthy: 73

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	81	81	81	81	80	79	78	78	78	77	77	77	77	76	76	75	75	74	74	72	72	71	72	72
Thu	73	74	76	77	78	80	81	82	84	85	85	85	86	86	86	86	86	86	86	86	86	86	85	85
Fri	84	84	83	83	83	83	83	83	83	83	84	84	84	85	86	87	89	94	97	97	96	93	90	90
Sat	90	90	91	92	93	94	95	96	96	97	97	98	98	99	99	99	100	101	103	103	100	97	97	96
Sun	96	95	94	93	92	90	89	87	86	86	85	85	85	85	85	85	88	95	98	97	94	89	83	80
Mon	79	78	76	75	74	73	72	70	70	69	68	68	67	68	67	68	70	74	77	76	73	69	66	64
Tue	64	63	63	63	63	63	63	63	63	63	63	63	63	62	62	63	65	67	71	72	69	67	67	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	81	81	81	81	80	79	78	78	78	77	77	77	77	76	76	75	75	74	74	72	72	71	72	72
Thu	73	74	76	77	78	80	81	82	84	85	85	85	86	86	86	86	86	86	86	86	86	86	85	85
Fri	84	84	83	83	83	83	83	83	83	83	84	84	84	85	86	87	89	94	97	97	96	93	90	90
Sat	90	90	91	92	93	94	95	96	96	97	97	98	98	99	99	99	100	101	103	103	100	97	97	96
Sun	96	95	94	93	92	90	89	87	86	86	85	85	85	85	85	85	88	95	98	97	94	89	83	80
Mon	79	78	76	75	74	73	72	70	70	69	68	68	67	68	67	68	70	74	77	76	73	69	66	64
Tue	64	63	63	63	63	63	63	63	63	63	63	63	63	62	62	63	65	67	71	72	69	67	67	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	81	81	81	81	80	79	78	78	78	77	77	77	77	76	76	75	75	74	74	72	72	71	72	72
Thu	73	74	76	77	78	80	81	82	84	85	85	85	86	86	86	86	86	86	86	86	86	86	85	85
Fri	84	84	83	83	83	83	83	83	83	83	84	84	84	85	86	87	89	94	97	97	96	93	90	90
Sat	90	90	91	92	93	94	95	96	96	97	97	98	98	99	99	99	100	101	103	103	100	97	97	96
Sun	96	95	94	93	92	90	89	87	86	86	85	85	85	85	85	85	88	95	98	97	94	89	83	80
Mon	79	78	76	75	74	73	72	70	70	69	68	68	67	68	67	68	70	74	77	76	73	69	66	64
Tue	64	63	63	63	63	63	63	63	63	63	63	63	63	62	62	63	65	67	71	72	69	67	67	68