30 Sep – 6 Oct 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

80.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 20 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+7.4 AQI compared with the previous week’s mean of 72.7.

Highest hourly estimate: 232 in Da Nang · 30 Sept, 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, 30 Sep	96.3Moderate	30–232	21.9	192 / 192
Thu, 1 Oct	89.7Moderate	39–187	23.4	192 / 192
Fri, 2 Oct	84.5Moderate	50–169	21.9	192 / 192
Sat, 3 Oct	76.1Moderate	50–174	18.8	192 / 192
Sun, 4 Oct	78.5Moderate	52–155	22.6	192 / 192
Mon, 5 Oct	73.1Moderate	27–172	15.2	192 / 192
Tue, 6 Oct	62.7Moderate	25–117	16.2	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	90	88	86	86	84	82	79	78	77	77	78	81	82	86	90	99	115	130	137	137	130	120	108	95
Thu	85	80	75	74	74	75	75	75	76	76	77	77	77	81	86	100	117	129	132	127	116	104	89	78
Fri	78	78	78	77	77	77	77	77	78	78	78	78	78	78	83	91	103	109	111	106	98	87	78	75
Sat	75	74	73	73	72	72	71	70	70	69	69	68	68	68	73	80	88	94	98	95	87	79	72	69
Sun	69	69	70	70	71	71	72	72	73	74	74	75	75	76	78	83	91	96	98	96	92	86	79	76
Mon	76	75	74	74	74	73	73	72	71	70	68	67	66	66	65	69	75	81	84	84	82	78	71	67
Tue	64	62	60	60	60	60	59	59	59	59	59	60	60	61	62	63	64	68	70	69	68	66	66	66

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
Ho Chi Minh City	100Moderate	172	33	168 / 168
Da Nang	94.9Moderate	232	17.6	168 / 168
Can Tho	93.4Moderate	161	29.6	168 / 168
Hanoi	91.5Moderate	203	24.6	168 / 168
Hue	82.7Moderate	174	18.9	168 / 168
Nha Trang	69.8Moderate	139	13.3	168 / 168
Hai Phong	61.5Moderate	108	14.1	168 / 168
Da Lat	47.2Good	65	8.7	168 / 168

City-hours by category

Good: 138

Moderate: 926

Unhealthy for Sensitive Groups: 218

Unhealthy: 51

Very Unhealthy: 11

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	90	88	86	86	84	82	79	78	77	77	78	81	82	86	90	99	115	130	137	137	130	120	108	95
Thu	85	80	75	74	74	75	75	75	76	76	77	77	77	81	86	100	117	129	132	127	116	104	89	78
Fri	78	78	78	77	77	77	77	77	78	78	78	78	78	78	83	91	103	109	111	106	98	87	78	75
Sat	75	74	73	73	72	72	71	70	70	69	69	68	68	68	73	80	88	94	98	95	87	79	72	69
Sun	69	69	70	70	71	71	72	72	73	74	74	75	75	76	78	83	91	96	98	96	92	86	79	76
Mon	76	75	74	74	74	73	73	72	71	70	68	67	66	66	65	69	75	81	84	84	82	78	71	67
Tue	64	62	60	60	60	60	59	59	59	59	59	60	60	61	62	63	64	68	70	69	68	66	66	66

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	90	88	86	86	84	82	79	78	77	77	78	81	82	86	90	99	115	130	137	137	130	120	108	95
Thu	85	80	75	74	74	75	75	75	76	76	77	77	77	81	86	100	117	129	132	127	116	104	89	78
Fri	78	78	78	77	77	77	77	77	78	78	78	78	78	78	83	91	103	109	111	106	98	87	78	75
Sat	75	74	73	73	72	72	71	70	70	69	69	68	68	68	73	80	88	94	98	95	87	79	72	69
Sun	69	69	70	70	71	71	72	72	73	74	74	75	75	76	78	83	91	96	98	96	92	86	79	76
Mon	76	75	74	74	74	73	73	72	71	70	68	67	66	66	65	69	75	81	84	84	82	78	71	67
Tue	64	62	60	60	60	60	59	59	59	59	59	60	60	61	62	63	64	68	70	69	68	66	66	66

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	90	88	86	86	84	82	79	78	77	77	78	81	82	86	90	99	115	130	137	137	130	120	108	95
Thu	85	80	75	74	74	75	75	75	76	76	77	77	77	81	86	100	117	129	132	127	116	104	89	78
Fri	78	78	78	77	77	77	77	77	78	78	78	78	78	78	83	91	103	109	111	106	98	87	78	75
Sat	75	74	73	73	72	72	71	70	70	69	69	68	68	68	73	80	88	94	98	95	87	79	72	69
Sun	69	69	70	70	71	71	72	72	73	74	74	75	75	76	78	83	91	96	98	96	92	86	79	76
Mon	76	75	74	74	74	73	73	72	71	70	68	67	66	66	65	69	75	81	84	84	82	78	71	67
Tue	64	62	60	60	60	60	59	59	59	59	59	60	60	61	62	63	64	68	70	69	68	66	66	66