22 – 28 Jul 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 21.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-11.1 AQI compared with the previous week’s mean of 94.5.

Highest hourly estimate: 223 in Hanoi · 22 Jul, 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, 22 Jul	103.6Unhealthy for Sensitive Groups	58–223	28.8	192 / 192
Thu, 23 Jul	90.9Moderate	54–200	23.7	192 / 192
Fri, 24 Jul	79.6Moderate	44–203	17.7	192 / 192
Sat, 25 Jul	82.3Moderate	24–206	21.9	192 / 192
Sun, 26 Jul	89.4Moderate	25–216	25.1	192 / 192
Mon, 27 Jul	75.7Moderate	25–201	16.7	192 / 192
Tue, 28 Jul	62.7Moderate	17–140	14.5	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	109	106	103	100	98	97	97	97	97	97	96	96	95	95	98	107	118	124	126	124	115	107	98	90
Thu	88	87	87	86	85	84	83	83	83	83	83	83	82	86	90	96	102	107	109	108	105	101	95	88
Fri	84	81	79	76	75	74	74	73	72	72	71	70	71	75	79	83	89	93	94	93	90	86	82	77
Sat	73	70	67	67	67	67	67	67	67	67	67	69	73	78	82	89	101	112	117	118	112	103	92	83
Sun	80	79	79	78	78	78	77	78	78	79	79	82	85	88	92	98	109	115	117	115	109	101	91	84
Mon	81	79	77	76	75	74	73	72	70	69	68	67	67	71	73	79	83	88	89	86	81	77	75	72
Tue	69	66	64	61	61	60	59	59	59	59	59	59	59	59	62	65	70	74	74	70	65	59	57	57

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	141.1Unhealthy for Sensitive Groups	223	50.4	168 / 168
Da Nang	114.4Unhealthy for Sensitive Groups	210	20.2	168 / 168
Ho Chi Minh City	84Moderate	106	25.8	168 / 168
Nha Trang	80.1Moderate	185	16.7	168 / 168
Hai Phong	80Moderate	184	19.7	168 / 168
Hue	65.8Moderate	107	15.2	168 / 168
Can Tho	62.7Moderate	83	14.7	168 / 168
Da Lat	39.4Good	62	7	168 / 168

City-hours by category

Good: 134

Moderate: 926

Unhealthy for Sensitive Groups: 140

Unhealthy: 121

Very Unhealthy: 23

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	109	106	103	100	98	97	97	97	97	97	96	96	95	95	98	107	118	124	126	124	115	107	98	90
Thu	88	87	87	86	85	84	83	83	83	83	83	83	82	86	90	96	102	107	109	108	105	101	95	88
Fri	84	81	79	76	75	74	74	73	72	72	71	70	71	75	79	83	89	93	94	93	90	86	82	77
Sat	73	70	67	67	67	67	67	67	67	67	67	69	73	78	82	89	101	112	117	118	112	103	92	83
Sun	80	79	79	78	78	78	77	78	78	79	79	82	85	88	92	98	109	115	117	115	109	101	91	84
Mon	81	79	77	76	75	74	73	72	70	69	68	67	67	71	73	79	83	88	89	86	81	77	75	72
Tue	69	66	64	61	61	60	59	59	59	59	59	59	59	59	62	65	70	74	74	70	65	59	57	57

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	109	106	103	100	98	97	97	97	97	97	96	96	95	95	98	107	118	124	126	124	115	107	98	90
Thu	88	87	87	86	85	84	83	83	83	83	83	83	82	86	90	96	102	107	109	108	105	101	95	88
Fri	84	81	79	76	75	74	74	73	72	72	71	70	71	75	79	83	89	93	94	93	90	86	82	77
Sat	73	70	67	67	67	67	67	67	67	67	67	69	73	78	82	89	101	112	117	118	112	103	92	83
Sun	80	79	79	78	78	78	77	78	78	79	79	82	85	88	92	98	109	115	117	115	109	101	91	84
Mon	81	79	77	76	75	74	73	72	70	69	68	67	67	71	73	79	83	88	89	86	81	77	75	72
Tue	69	66	64	61	61	60	59	59	59	59	59	59	59	59	62	65	70	74	74	70	65	59	57	57

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	109	106	103	100	98	97	97	97	97	97	96	96	95	95	98	107	118	124	126	124	115	107	98	90
Thu	88	87	87	86	85	84	83	83	83	83	83	83	82	86	90	96	102	107	109	108	105	101	95	88
Fri	84	81	79	76	75	74	74	73	72	72	71	70	71	75	79	83	89	93	94	93	90	86	82	77
Sat	73	70	67	67	67	67	67	67	67	67	67	69	73	78	82	89	101	112	117	118	112	103	92	83
Sun	80	79	79	78	78	78	77	78	78	79	79	82	85	88	92	98	109	115	117	115	109	101	91	84
Mon	81	79	77	76	75	74	73	72	70	69	68	67	67	71	73	79	83	88	89	86	81	77	75	72
Tue	69	66	64	61	61	60	59	59	59	59	59	59	59	59	62	65	70	74	74	70	65	59	57	57