23 – 29 Jul 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

86.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 28.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+3.3 AQI compared with the previous week’s mean of 83.5.

Highest hourly estimate: 240 in Hanoi · 28 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, 23 Jul	65.1Moderate	29–186	18.4	192 / 192
Thu, 24 Jul	72.9Moderate	31–122	21.4	192 / 192
Fri, 25 Jul	81.7Moderate	40–163	29.1	192 / 192
Sat, 26 Jul	98.5Moderate	51–222	36.8	192 / 192
Sun, 27 Jul	97.4Moderate	29–198	31.1	192 / 192
Mon, 28 Jul	93.3Moderate	21–240	36.1	192 / 192
Tue, 29 Jul	98.7Moderate	29–227	28.7	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	54	55	55	56	56	57	57	58	58	58	58	59	59	60	64	69	75	79	82	83	81	80	77	75
Thu	73	71	68	69	69	70	70	71	71	71	71	71	71	71	71	71	72	75	77	79	80	80	80	80
Fri	79	78	77	75	74	74	75	75	75	76	76	76	76	77	78	82	89	94	97	98	95	91	87	87
Sat	87	88	89	90	91	92	92	93	94	95	95	95	96	96	99	103	110	113	114	112	111	109	104	99
Sun	97	95	94	94	94	94	94	93	93	93	92	92	92	91	91	92	99	107	111	112	110	106	103	100
Mon	98	93	89	85	85	85	85	86	86	86	86	87	87	88	88	93	100	105	107	107	106	104	103	102
Tue	101	99	95	92	89	89	88	88	87	87	86	86	86	91	92	98	108	117	121	121	119	116	111	103

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	141.2Unhealthy for Sensitive Groups	240	66.6	168 / 168
Hai Phong	132Unhealthy for Sensitive Groups	210	61.4	168 / 168
Da Nang	94Moderate	215	14.4	168 / 168
Ho Chi Minh City	89.7Moderate	111	30.1	168 / 168
Nha Trang	68.2Moderate	114	16	168 / 168
Can Tho	66.2Moderate	74	17.7	168 / 168
Hue	64.8Moderate	77	17.3	168 / 168
Da Lat	38.4Good	53	6.9	168 / 168

City-hours by category

Good: 133

Moderate: 888

Unhealthy for Sensitive Groups: 108

Unhealthy: 185

Very Unhealthy: 30

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	54	55	55	56	56	57	57	58	58	58	58	59	59	60	64	69	75	79	82	83	81	80	77	75
Thu	73	71	68	69	69	70	70	71	71	71	71	71	71	71	71	71	72	75	77	79	80	80	80	80
Fri	79	78	77	75	74	74	75	75	75	76	76	76	76	77	78	82	89	94	97	98	95	91	87	87
Sat	87	88	89	90	91	92	92	93	94	95	95	95	96	96	99	103	110	113	114	112	111	109	104	99
Sun	97	95	94	94	94	94	94	93	93	93	92	92	92	91	91	92	99	107	111	112	110	106	103	100
Mon	98	93	89	85	85	85	85	86	86	86	86	87	87	88	88	93	100	105	107	107	106	104	103	102
Tue	101	99	95	92	89	89	88	88	87	87	86	86	86	91	92	98	108	117	121	121	119	116	111	103

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	54	55	55	56	56	57	57	58	58	58	58	59	59	60	64	69	75	79	82	83	81	80	77	75
Thu	73	71	68	69	69	70	70	71	71	71	71	71	71	71	71	71	72	75	77	79	80	80	80	80
Fri	79	78	77	75	74	74	75	75	75	76	76	76	76	77	78	82	89	94	97	98	95	91	87	87
Sat	87	88	89	90	91	92	92	93	94	95	95	95	96	96	99	103	110	113	114	112	111	109	104	99
Sun	97	95	94	94	94	94	94	93	93	93	92	92	92	91	91	92	99	107	111	112	110	106	103	100
Mon	98	93	89	85	85	85	85	86	86	86	86	87	87	88	88	93	100	105	107	107	106	104	103	102
Tue	101	99	95	92	89	89	88	88	87	87	86	86	86	91	92	98	108	117	121	121	119	116	111	103

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	54	55	55	56	56	57	57	58	58	58	58	59	59	60	64	69	75	79	82	83	81	80	77	75
Thu	73	71	68	69	69	70	70	71	71	71	71	71	71	71	71	71	72	75	77	79	80	80	80	80
Fri	79	78	77	75	74	74	75	75	75	76	76	76	76	77	78	82	89	94	97	98	95	91	87	87
Sat	87	88	89	90	91	92	92	93	94	95	95	95	96	96	99	103	110	113	114	112	111	109	104	99
Sun	97	95	94	94	94	94	94	93	93	93	92	92	92	91	91	92	99	107	111	112	110	106	103	100
Mon	98	93	89	85	85	85	85	86	86	86	86	87	87	88	88	93	100	105	107	107	106	104	103	102
Tue	101	99	95	92	89	89	88	88	87	87	86	86	86	91	92	98	108	117	121	121	119	116	111	103