1 – 7 Oct 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

78.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 22.1 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+24 AQI compared with the previous week’s mean of 54.3.

Highest hourly estimate: 201 in Da Nang · 5 Oct, 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, 1 Oct	70.6Moderate	35–121	22.3	192 / 192
Thu, 2 Oct	79.8Moderate	51–142	22.5	192 / 192
Fri, 3 Oct	75.3Moderate	51–123	19.9	192 / 192
Sat, 4 Oct	68.8Moderate	46–110	19.1	192 / 192
Sun, 5 Oct	84.1Moderate	36–201	27.3	192 / 192
Mon, 6 Oct	86.2Moderate	52–178	23.8	192 / 192
Tue, 7 Oct	83.3Moderate	58–165	19.7	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	58	59	60	61	62	64	65	66	68	69	70	70	71	74	77	79	82	84	83	79	74	74	74	75
Thu	75	76	77	78	78	79	80	81	81	81	80	80	79	79	80	82	84	85	85	83	81	78	77	77
Fri	76	76	75	74	74	73	73	73	73	73	74	74	74	74	77	79	81	82	81	79	76	73	72	72
Sat	71	70	70	70	69	69	68	68	67	66	66	66	65	65	67	69	73	75	74	72	69	67	67	68
Sun	69	71	73	74	75	76	77	77	78	78	79	79	79	84	83	90	94	98	100	101	100	97	95	92
Mon	88	85	85	84	83	82	81	80	79	79	79	79	80	80	80	80	89	96	101	102	100	97	94	89
Tue	84	79	79	79	80	80	80	80	79	78	77	78	80	83	85	89	94	98	99	96	89	83	78	76

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	110.9Unhealthy for Sensitive Groups	157	40.2	168 / 168
Ho Chi Minh City	96.2Moderate	146	33.4	168 / 168
Da Nang	82.2Moderate	201	15.3	168 / 168
Can Tho	79.6Moderate	101	24	168 / 168
Hai Phong	74.2Moderate	106	22	168 / 168
Hue	67.4Moderate	124	16.9	168 / 168
Nha Trang	62.7Moderate	136	13.2	168 / 168
Da Lat	53.2Moderate	63	11.7	168 / 168

City-hours by category

Good: 56

Moderate: 1075

Unhealthy for Sensitive Groups: 176

Unhealthy: 35

Very Unhealthy: 2

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	58	59	60	61	62	64	65	66	68	69	70	70	71	74	77	79	82	84	83	79	74	74	74	75
Thu	75	76	77	78	78	79	80	81	81	81	80	80	79	79	80	82	84	85	85	83	81	78	77	77
Fri	76	76	75	74	74	73	73	73	73	73	74	74	74	74	77	79	81	82	81	79	76	73	72	72
Sat	71	70	70	70	69	69	68	68	67	66	66	66	65	65	67	69	73	75	74	72	69	67	67	68
Sun	69	71	73	74	75	76	77	77	78	78	79	79	79	84	83	90	94	98	100	101	100	97	95	92
Mon	88	85	85	84	83	82	81	80	79	79	79	79	80	80	80	80	89	96	101	102	100	97	94	89
Tue	84	79	79	79	80	80	80	80	79	78	77	78	80	83	85	89	94	98	99	96	89	83	78	76

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	58	59	60	61	62	64	65	66	68	69	70	70	71	74	77	79	82	84	83	79	74	74	74	75
Thu	75	76	77	78	78	79	80	81	81	81	80	80	79	79	80	82	84	85	85	83	81	78	77	77
Fri	76	76	75	74	74	73	73	73	73	73	74	74	74	74	77	79	81	82	81	79	76	73	72	72
Sat	71	70	70	70	69	69	68	68	67	66	66	66	65	65	67	69	73	75	74	72	69	67	67	68
Sun	69	71	73	74	75	76	77	77	78	78	79	79	79	84	83	90	94	98	100	101	100	97	95	92
Mon	88	85	85	84	83	82	81	80	79	79	79	79	80	80	80	80	89	96	101	102	100	97	94	89
Tue	84	79	79	79	80	80	80	80	79	78	77	78	80	83	85	89	94	98	99	96	89	83	78	76

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	58	59	60	61	62	64	65	66	68	69	70	70	71	74	77	79	82	84	83	79	74	74	74	75
Thu	75	76	77	78	78	79	80	81	81	81	80	80	79	79	80	82	84	85	85	83	81	78	77	77
Fri	76	76	75	74	74	73	73	73	73	73	74	74	74	74	77	79	81	82	81	79	76	73	72	72
Sat	71	70	70	70	69	69	68	68	67	66	66	66	65	65	67	69	73	75	74	72	69	67	67	68
Sun	69	71	73	74	75	76	77	77	78	78	79	79	79	84	83	90	94	98	100	101	100	97	95	92
Mon	88	85	85	84	83	82	81	80	79	79	79	79	80	80	80	80	89	96	101	102	100	97	94	89
Tue	84	79	79	79	80	80	80	80	79	78	77	78	80	83	85	89	94	98	99	96	89	83	78	76