8 – 14 Jan 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

92.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 30.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-19 AQI compared with the previous week’s mean of 111.6.

Highest hourly estimate: 177 in Hanoi · 13 Jan, 15:00 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, 8 Jan	97.4Moderate	48–176	30.8	192 / 192
Thu, 9 Jan	93.1Moderate	40–156	30.3	192 / 192
Fri, 10 Jan	89.7Moderate	39–152	25.9	192 / 192
Sat, 11 Jan	84.2Moderate	45–130	25.9	192 / 192
Sun, 12 Jan	85.5Moderate	45–155	28.5	192 / 192
Mon, 13 Jan	97.1Moderate	50–177	36.2	192 / 192
Tue, 14 Jan	100.9Unhealthy for Sensitive Groups	29–170	35.1	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	104	103	102	100	98	97	96	95	94	93	93	93	93	93	94	95	99	101	99	97	95	94
Thu	93	93	93	93	93	93	92	92	91	91	92	92	92	92	92	92	92	95	98	99	97	93	92	93
Fri	93	92	92	91	90	90	90	90	90	89	89	88	87	87	87	87	88	89	91	92	92	91	90	89
Sat	87	86	85	85	84	84	83	83	83	83	83	83	82	83	83	83	84	84	86	87	86	86	85	85
Sun	84	84	84	84	84	85	85	86	86	86	86	86	86	85	85	85	85	86	87	87	86	86	87	87
Mon	88	89	90	90	91	92	93	94	96	97	98	98	99	99	100	100	100	101	103	105	104	103	102	101
Tue	101	101	101	101	101	101	101	101	101	101	101	100	101	101	101	101	101	101	101	101	101	101	100	100

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	135.1Unhealthy for Sensitive Groups	177	54.7	168 / 168
Hai Phong	119Unhealthy for Sensitive Groups	153	43.2	168 / 168
Can Tho	114.3Unhealthy for Sensitive Groups	154	39.6	168 / 168
Ho Chi Minh City	106.1Unhealthy for Sensitive Groups	156	38	168 / 168
Hue	82.2Moderate	104	26.1	168 / 168
Da Nang	78.7Moderate	126	21.3	168 / 168
Nha Trang	58.7Moderate	79	12.8	168 / 168
Da Lat	46.3Good	55	7.5	168 / 168

City-hours by category

Good: 121

Moderate: 726

Unhealthy for Sensitive Groups: 372

Unhealthy: 125

Very Unhealthy: 0

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	104	103	102	100	98	97	96	95	94	93	93	93	93	93	94	95	99	101	99	97	95	94
Thu	93	93	93	93	93	93	92	92	91	91	92	92	92	92	92	92	92	95	98	99	97	93	92	93
Fri	93	92	92	91	90	90	90	90	90	89	89	88	87	87	87	87	88	89	91	92	92	91	90	89
Sat	87	86	85	85	84	84	83	83	83	83	83	83	82	83	83	83	84	84	86	87	86	86	85	85
Sun	84	84	84	84	84	85	85	86	86	86	86	86	86	85	85	85	85	86	87	87	86	86	87	87
Mon	88	89	90	90	91	92	93	94	96	97	98	98	99	99	100	100	100	101	103	105	104	103	102	101
Tue	101	101	101	101	101	101	101	101	101	101	101	100	101	101	101	101	101	101	101	101	101	101	100	100

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	104	103	102	100	98	97	96	95	94	93	93	93	93	93	94	95	99	101	99	97	95	94
Thu	93	93	93	93	93	93	92	92	91	91	92	92	92	92	92	92	92	95	98	99	97	93	92	93
Fri	93	92	92	91	90	90	90	90	90	89	89	88	87	87	87	87	88	89	91	92	92	91	90	89
Sat	87	86	85	85	84	84	83	83	83	83	83	83	82	83	83	83	84	84	86	87	86	86	85	85
Sun	84	84	84	84	84	85	85	86	86	86	86	86	86	85	85	85	85	86	87	87	86	86	87	87
Mon	88	89	90	90	91	92	93	94	96	97	98	98	99	99	100	100	100	101	103	105	104	103	102	101
Tue	101	101	101	101	101	101	101	101	101	101	101	100	101	101	101	101	101	101	101	101	101	101	100	100

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	104	103	102	100	98	97	96	95	94	93	93	93	93	93	94	95	99	101	99	97	95	94
Thu	93	93	93	93	93	93	92	92	91	91	92	92	92	92	92	92	92	95	98	99	97	93	92	93
Fri	93	92	92	91	90	90	90	90	90	89	89	88	87	87	87	87	88	89	91	92	92	91	90	89
Sat	87	86	85	85	84	84	83	83	83	83	83	83	82	83	83	83	84	84	86	87	86	86	85	85
Sun	84	84	84	84	84	85	85	86	86	86	86	86	86	85	85	85	85	86	87	87	86	86	87	87
Mon	88	89	90	90	91	92	93	94	96	97	98	98	99	99	100	100	100	101	103	105	104	103	102	101
Tue	101	101	101	101	101	101	101	101	101	101	101	100	101	101	101	101	101	101	101	101	101	101	100	100