5 – 11 Aug 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+4 AQI compared with the previous week’s mean of 79.

Highest hourly estimate: 237 in Hai Phong · 11 Aug, 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, 5 Aug	83Moderate	30–167	23.5	192 / 192
Thu, 6 Aug	80.4Moderate	44–165	19.8	192 / 192
Fri, 7 Aug	76.7Moderate	24–201	25	192 / 192
Sat, 8 Aug	99.6Moderate	40–204	32.3	192 / 192
Sun, 9 Aug	84.9Moderate	22–221	24.5	192 / 192
Mon, 10 Aug	74.3Moderate	15–215	20.2	192 / 192
Tue, 11 Aug	81.8Moderate	16–237	25.6	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	93	89	84	82	82	82	81	81	80	80	79	79	79	79	79	78	79	82	87	90	89	88	87	85
Thu	84	82	80	78	78	77	77	77	76	76	76	76	75	75	74	79	85	90	92	92	89	86	81	79
Fri	76	74	72	69	67	67	66	66	66	67	68	68	69	70	71	77	85	91	95	96	95	91	89	87
Sat	83	82	84	86	88	90	91	93	93	94	94	94	95	94	95	101	112	121	125	125	121	115	110	105
Sun	101	96	90	89	88	87	86	84	83	82	81	81	80	80	80	84	87	90	90	86	83	80	77	75
Mon	74	73	72	71	71	70	69	69	68	68	68	68	68	69	70	75	84	89	90	88	83	78	76	74
Tue	71	69	70	70	71	71	72	72	73	73	73	73	74	74	78	88	95	101	105	105	103	100	94	89

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	144.7Unhealthy for Sensitive Groups	220	57.4	168 / 168
Hai Phong	125.4Unhealthy for Sensitive Groups	237	45.3	168 / 168
Ho Chi Minh City	87.4Moderate	123	28	168 / 168
Da Nang	82.5Moderate	201	12.8	168 / 168
Can Tho	67.9Moderate	83	17.9	168 / 168
Nha Trang	67.3Moderate	121	15	168 / 168
Hue	54.1Moderate	79	13.3	168 / 168
Da Lat	34.5Good	54	5.6	168 / 168

City-hours by category

Good: 263

Moderate: 750

Unhealthy for Sensitive Groups: 151

Unhealthy: 146

Very Unhealthy: 34

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	93	89	84	82	82	82	81	81	80	80	79	79	79	79	79	78	79	82	87	90	89	88	87	85
Thu	84	82	80	78	78	77	77	77	76	76	76	76	75	75	74	79	85	90	92	92	89	86	81	79
Fri	76	74	72	69	67	67	66	66	66	67	68	68	69	70	71	77	85	91	95	96	95	91	89	87
Sat	83	82	84	86	88	90	91	93	93	94	94	94	95	94	95	101	112	121	125	125	121	115	110	105
Sun	101	96	90	89	88	87	86	84	83	82	81	81	80	80	80	84	87	90	90	86	83	80	77	75
Mon	74	73	72	71	71	70	69	69	68	68	68	68	68	69	70	75	84	89	90	88	83	78	76	74
Tue	71	69	70	70	71	71	72	72	73	73	73	73	74	74	78	88	95	101	105	105	103	100	94	89

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	93	89	84	82	82	82	81	81	80	80	79	79	79	79	79	78	79	82	87	90	89	88	87	85
Thu	84	82	80	78	78	77	77	77	76	76	76	76	75	75	74	79	85	90	92	92	89	86	81	79
Fri	76	74	72	69	67	67	66	66	66	67	68	68	69	70	71	77	85	91	95	96	95	91	89	87
Sat	83	82	84	86	88	90	91	93	93	94	94	94	95	94	95	101	112	121	125	125	121	115	110	105
Sun	101	96	90	89	88	87	86	84	83	82	81	81	80	80	80	84	87	90	90	86	83	80	77	75
Mon	74	73	72	71	71	70	69	69	68	68	68	68	68	69	70	75	84	89	90	88	83	78	76	74
Tue	71	69	70	70	71	71	72	72	73	73	73	73	74	74	78	88	95	101	105	105	103	100	94	89

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	93	89	84	82	82	82	81	81	80	80	79	79	79	79	79	78	79	82	87	90	89	88	87	85
Thu	84	82	80	78	78	77	77	77	76	76	76	76	75	75	74	79	85	90	92	92	89	86	81	79
Fri	76	74	72	69	67	67	66	66	66	67	68	68	69	70	71	77	85	91	95	96	95	91	89	87
Sat	83	82	84	86	88	90	91	93	93	94	94	94	95	94	95	101	112	121	125	125	121	115	110	105
Sun	101	96	90	89	88	87	86	84	83	82	81	81	80	80	80	84	87	90	90	86	83	80	77	75
Mon	74	73	72	71	71	70	69	69	68	68	68	68	68	69	70	75	84	89	90	88	83	78	76	74
Tue	71	69	70	70	71	71	72	72	73	73	73	73	74	74	78	88	95	101	105	105	103	100	94	89