29 Jan – 4 Feb 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

87.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 26.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+6.2 AQI compared with the previous week’s mean of 81.1.

Highest hourly estimate: 182 in Hanoi · 30 Jan, 16:00 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, 29 Jan	98.4Moderate	43–164	34.5	192 / 192
Thu, 30 Jan	102.5Unhealthy for Sensitive Groups	43–182	37.6	192 / 192
Fri, 31 Jan	99.1Moderate	46–170	29.2	192 / 192
Sat, 1 Feb	92.1Moderate	54–169	26	192 / 192
Sun, 2 Feb	81Moderate	53–152	22.6	192 / 192
Mon, 3 Feb	72.6Moderate	44–117	15.9	192 / 192
Tue, 4 Feb	65.7Moderate	36–124	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	88	89	91	93	94	95	95	95	96	96	97	97	96	97	97	98	100	108	113	114	111	107	100	98
Thu	98	98	98	98	98	99	100	100	101	102	102	103	103	103	103	104	106	107	107	110	108	106	105	105
Fri	105	104	103	102	101	100	99	98	97	96	95	94	94	93	93	94	97	103	108	107	104	101	97	94
Sat	90	89	89	89	89	89	88	88	88	88	87	87	87	87	87	88	94	104	110	110	106	99	92	87
Sun	83	82	81	81	80	79	78	78	77	77	77	77	76	76	76	76	78	87	94	95	92	87	82	76
Mon	76	76	76	76	76	76	76	76	75	75	74	73	72	72	71	70	70	71	73	73	71	68	65	63
Tue	62	62	61	61	60	60	60	59	59	60	60	61	61	62	63	65	66	71	77	80	80	78	74	74

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
Can Tho	119Unhealthy for Sensitive Groups	169	41.5	168 / 168
Hanoi	116.7Unhealthy for Sensitive Groups	182	45.7	168 / 168
Ho Chi Minh City	106.8Unhealthy for Sensitive Groups	168	33.5	168 / 168
Hai Phong	97.3Moderate	159	31.8	168 / 168
Da Nang	76.6Moderate	145	20	168 / 168
Hue	74.6Moderate	124	20.8	168 / 168
Nha Trang	57.7Moderate	62	13	168 / 168
Da Lat	50Good	75	9.3	168 / 168

City-hours by category

Good: 98

Moderate: 870

Unhealthy for Sensitive Groups: 230

Unhealthy: 146

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	88	89	91	93	94	95	95	95	96	96	97	97	96	97	97	98	100	108	113	114	111	107	100	98
Thu	98	98	98	98	98	99	100	100	101	102	102	103	103	103	103	104	106	107	107	110	108	106	105	105
Fri	105	104	103	102	101	100	99	98	97	96	95	94	94	93	93	94	97	103	108	107	104	101	97	94
Sat	90	89	89	89	89	89	88	88	88	88	87	87	87	87	87	88	94	104	110	110	106	99	92	87
Sun	83	82	81	81	80	79	78	78	77	77	77	77	76	76	76	76	78	87	94	95	92	87	82	76
Mon	76	76	76	76	76	76	76	76	75	75	74	73	72	72	71	70	70	71	73	73	71	68	65	63
Tue	62	62	61	61	60	60	60	59	59	60	60	61	61	62	63	65	66	71	77	80	80	78	74	74

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	88	89	91	93	94	95	95	95	96	96	97	97	96	97	97	98	100	108	113	114	111	107	100	98
Thu	98	98	98	98	98	99	100	100	101	102	102	103	103	103	103	104	106	107	107	110	108	106	105	105
Fri	105	104	103	102	101	100	99	98	97	96	95	94	94	93	93	94	97	103	108	107	104	101	97	94
Sat	90	89	89	89	89	89	88	88	88	88	87	87	87	87	87	88	94	104	110	110	106	99	92	87
Sun	83	82	81	81	80	79	78	78	77	77	77	77	76	76	76	76	78	87	94	95	92	87	82	76
Mon	76	76	76	76	76	76	76	76	75	75	74	73	72	72	71	70	70	71	73	73	71	68	65	63
Tue	62	62	61	61	60	60	60	59	59	60	60	61	61	62	63	65	66	71	77	80	80	78	74	74

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	88	89	91	93	94	95	95	95	96	96	97	97	96	97	97	98	100	108	113	114	111	107	100	98
Thu	98	98	98	98	98	99	100	100	101	102	102	103	103	103	103	104	106	107	107	110	108	106	105	105
Fri	105	104	103	102	101	100	99	98	97	96	95	94	94	93	93	94	97	103	108	107	104	101	97	94
Sat	90	89	89	89	89	89	88	88	88	88	87	87	87	87	87	88	94	104	110	110	106	99	92	87
Sun	83	82	81	81	80	79	78	78	77	77	77	77	76	76	76	76	78	87	94	95	92	87	82	76
Mon	76	76	76	76	76	76	76	76	75	75	74	73	72	72	71	70	70	71	73	73	71	68	65	63
Tue	62	62	61	61	60	60	60	59	59	60	60	61	61	62	63	65	66	71	77	80	80	78	74	74