29 Jul – 4 Aug 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

79Weekly mean modelled AQI · Moderate

Mean PM2.5: 21.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-4.4 AQI compared with the previous week’s mean of 83.4.

Highest hourly estimate: 222 in Da Nang · 31 Jul, 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, 29 Jul	63.7Moderate	15–128	16.6	192 / 192
Thu, 30 Jul	69.8Moderate	20–117	19.9	192 / 192
Fri, 31 Jul	77.1Moderate	46–222	20.4	192 / 192
Sat, 1 Aug	79.6Moderate	35–170	22.9	192 / 192
Sun, 2 Aug	81.7Moderate	46–175	22.2	192 / 192
Mon, 3 Aug	88Moderate	53–219	24.3	192 / 192
Tue, 4 Aug	93.2Moderate	51–207	26.4	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	57	58	59	59	59	60	60	61	60	60	60	61	61	63	66	70	74	76	77	73	68	63	62	62
Thu	62	63	63	64	64	65	66	67	67	67	68	68	68	68	70	74	79	82	82	79	75	72	71	71
Fri	71	71	71	71	71	70	70	70	70	70	70	70	71	75	76	81	85	89	90	90	89	88	87	85
Sat	82	79	76	74	74	75	75	76	77	77	77	77	78	78	78	79	82	85	89	89	87	86	83	79
Sun	78	77	76	76	76	76	76	76	75	75	76	76	76	77	81	85	89	95	98	97	93	90	86	83
Mon	82	80	79	78	77	75	74	73	73	73	73	73	78	80	84	94	107	114	118	116	112	106	101	93
Tue	91	90	89	87	85	83	84	84	84	85	85	86	86	86	91	97	104	109	112	112	108	103	99	97

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	119.8Unhealthy for Sensitive Groups	199	43.2	168 / 168
Da Nang	107.1Unhealthy for Sensitive Groups	222	20.4	168 / 168
Ho Chi Minh City	91.8Moderate	106	31.7	168 / 168
Nha Trang	71.9Moderate	152	19.1	168 / 168
Hue	68.6Moderate	112	16.8	168 / 168
Can Tho	68.2Moderate	85	19.4	168 / 168
Hai Phong	60.1Moderate	82	15.1	168 / 168
Da Lat	44.6Good	57	8.9	168 / 168

City-hours by category

Good: 113

Moderate: 961

Unhealthy for Sensitive Groups: 218

Unhealthy: 35

Very Unhealthy: 17

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	57	58	59	59	59	60	60	61	60	60	60	61	61	63	66	70	74	76	77	73	68	63	62	62
Thu	62	63	63	64	64	65	66	67	67	67	68	68	68	68	70	74	79	82	82	79	75	72	71	71
Fri	71	71	71	71	71	70	70	70	70	70	70	70	71	75	76	81	85	89	90	90	89	88	87	85
Sat	82	79	76	74	74	75	75	76	77	77	77	77	78	78	78	79	82	85	89	89	87	86	83	79
Sun	78	77	76	76	76	76	76	76	75	75	76	76	76	77	81	85	89	95	98	97	93	90	86	83
Mon	82	80	79	78	77	75	74	73	73	73	73	73	78	80	84	94	107	114	118	116	112	106	101	93
Tue	91	90	89	87	85	83	84	84	84	85	85	86	86	86	91	97	104	109	112	112	108	103	99	97

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	57	58	59	59	59	60	60	61	60	60	60	61	61	63	66	70	74	76	77	73	68	63	62	62
Thu	62	63	63	64	64	65	66	67	67	67	68	68	68	68	70	74	79	82	82	79	75	72	71	71
Fri	71	71	71	71	71	70	70	70	70	70	70	70	71	75	76	81	85	89	90	90	89	88	87	85
Sat	82	79	76	74	74	75	75	76	77	77	77	77	78	78	78	79	82	85	89	89	87	86	83	79
Sun	78	77	76	76	76	76	76	76	75	75	76	76	76	77	81	85	89	95	98	97	93	90	86	83
Mon	82	80	79	78	77	75	74	73	73	73	73	73	78	80	84	94	107	114	118	116	112	106	101	93
Tue	91	90	89	87	85	83	84	84	84	85	85	86	86	86	91	97	104	109	112	112	108	103	99	97

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	57	58	59	59	59	60	60	61	60	60	60	61	61	63	66	70	74	76	77	73	68	63	62	62
Thu	62	63	63	64	64	65	66	67	67	67	68	68	68	68	70	74	79	82	82	79	75	72	71	71
Fri	71	71	71	71	71	70	70	70	70	70	70	70	71	75	76	81	85	89	90	90	89	88	87	85
Sat	82	79	76	74	74	75	75	76	77	77	77	77	78	78	78	79	82	85	89	89	87	86	83	79
Sun	78	77	76	76	76	76	76	76	75	75	76	76	76	77	81	85	89	95	98	97	93	90	86	83
Mon	82	80	79	78	77	75	74	73	73	73	73	73	78	80	84	94	107	114	118	116	112	106	101	93
Tue	91	90	89	87	85	83	84	84	84	85	85	86	86	86	91	97	104	109	112	112	108	103	99	97