6 – 12 Aug 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

98.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 26.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.9 AQI compared with the previous week’s mean of 96.6.

Highest hourly estimate: 248 in Da Nang · 7 Aug, 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, 6 Aug	107.8Unhealthy for Sensitive Groups	55–200	35.3	192 / 192
Thu, 7 Aug	100.5Unhealthy for Sensitive Groups	35–248	28.6	192 / 192
Fri, 8 Aug	108.8Unhealthy for Sensitive Groups	51–231	29	192 / 192
Sat, 9 Aug	101.7Unhealthy for Sensitive Groups	53–214	24.2	192 / 192
Sun, 10 Aug	90.6Moderate	55–215	21.8	192 / 192
Mon, 11 Aug	89.2Moderate	52–225	20.6	192 / 192
Tue, 12 Aug	91Moderate	50–232	24.1	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	107	106	105	103	102	101	101	102	102	102	102	102	102	102	103	109	116	122	125	123	120	115	111	106
Thu	102	98	95	92	90	88	88	88	88	87	87	88	92	94	97	104	115	124	127	126	122	114	106	104
Fri	103	102	99	97	94	92	93	93	93	93	93	97	100	102	110	117	128	138	142	141	135	127	116	106
Sat	101	98	95	91	88	87	86	85	85	84	84	84	90	90	95	105	118	130	137	138	133	125	112	100
Sun	92	88	86	83	80	77	77	77	76	76	76	75	80	81	86	94	106	114	118	116	112	107	102	98
Mon	93	90	86	83	81	79	77	75	75	74	74	76	79	83	89	96	103	109	113	112	107	102	96	90
Tue	87	86	84	83	81	80	77	75	74	74	74	79	82	85	90	97	103	112	116	116	114	110	105	102

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
Da Nang	146.6Unhealthy for Sensitive Groups	248	21.3	168 / 168
Hanoi	142.5Unhealthy for Sensitive Groups	208	54	168 / 168
Ho Chi Minh City	107.5Unhealthy for Sensitive Groups	152	38	168 / 168
Nha Trang	92.6Moderate	191	18	168 / 168
Hai Phong	91.1Moderate	163	26.4	168 / 168
Hue	76.7Moderate	143	17.8	168 / 168
Can Tho	74.4Moderate	109	22	168 / 168
Da Lat	56.8Moderate	70	12.2	168 / 168

City-hours by category

Good: 24

Moderate: 837

Unhealthy for Sensitive Groups: 272

Unhealthy: 160

Very Unhealthy: 51

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	107	106	105	103	102	101	101	102	102	102	102	102	102	102	103	109	116	122	125	123	120	115	111	106
Thu	102	98	95	92	90	88	88	88	88	87	87	88	92	94	97	104	115	124	127	126	122	114	106	104
Fri	103	102	99	97	94	92	93	93	93	93	93	97	100	102	110	117	128	138	142	141	135	127	116	106
Sat	101	98	95	91	88	87	86	85	85	84	84	84	90	90	95	105	118	130	137	138	133	125	112	100
Sun	92	88	86	83	80	77	77	77	76	76	76	75	80	81	86	94	106	114	118	116	112	107	102	98
Mon	93	90	86	83	81	79	77	75	75	74	74	76	79	83	89	96	103	109	113	112	107	102	96	90
Tue	87	86	84	83	81	80	77	75	74	74	74	79	82	85	90	97	103	112	116	116	114	110	105	102

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	107	106	105	103	102	101	101	102	102	102	102	102	102	102	103	109	116	122	125	123	120	115	111	106
Thu	102	98	95	92	90	88	88	88	88	87	87	88	92	94	97	104	115	124	127	126	122	114	106	104
Fri	103	102	99	97	94	92	93	93	93	93	93	97	100	102	110	117	128	138	142	141	135	127	116	106
Sat	101	98	95	91	88	87	86	85	85	84	84	84	90	90	95	105	118	130	137	138	133	125	112	100
Sun	92	88	86	83	80	77	77	77	76	76	76	75	80	81	86	94	106	114	118	116	112	107	102	98
Mon	93	90	86	83	81	79	77	75	75	74	74	76	79	83	89	96	103	109	113	112	107	102	96	90
Tue	87	86	84	83	81	80	77	75	74	74	74	79	82	85	90	97	103	112	116	116	114	110	105	102

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	107	106	105	103	102	101	101	102	102	102	102	102	102	102	103	109	116	122	125	123	120	115	111	106
Thu	102	98	95	92	90	88	88	88	88	87	87	88	92	94	97	104	115	124	127	126	122	114	106	104
Fri	103	102	99	97	94	92	93	93	93	93	93	97	100	102	110	117	128	138	142	141	135	127	116	106
Sat	101	98	95	91	88	87	86	85	85	84	84	84	90	90	95	105	118	130	137	138	133	125	112	100
Sun	92	88	86	83	80	77	77	77	76	76	76	75	80	81	86	94	106	114	118	116	112	107	102	98
Mon	93	90	86	83	81	79	77	75	75	74	74	76	79	83	89	96	103	109	113	112	107	102	96	90
Tue	87	86	84	83	81	80	77	75	74	74	74	79	82	85	90	97	103	112	116	116	114	110	105	102