12 – 18 Mar 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

79.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 23.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.7 AQI compared with the previous week’s mean of 77.5.

Highest hourly estimate: 197 in Da Nang · 15 Mar, 17:00 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, 12 Mar	72.9Moderate	42–140	18.9	192 / 192
Thu, 13 Mar	70.1Moderate	52–180	17.7	192 / 192
Fri, 14 Mar	72.6Moderate	53–146	20.8	192 / 192
Sat, 15 Mar	81.7Moderate	60–197	23.9	192 / 192
Sun, 16 Mar	78.9Moderate	62–116	24.4	192 / 192
Mon, 17 Mar	86.6Moderate	39–158	31.7	192 / 192
Tue, 18 Mar	91.5Moderate	31–158	25.7	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	76	76	76	76	75	75	74	73	72	72	71	71	71	71	70	70	73	76	77	76	73	71	69	69
Thu	69	68	68	68	67	67	67	66	66	65	65	65	65	66	70	74	77	81	82	81	78	73	68	66
Fri	66	67	67	68	68	68	69	69	69	70	70	70	70	70	71	74	80	84	85	84	80	76	74	72
Sat	72	73	73	73	73	73	73	74	74	74	74	74	78	79	84	92	99	102	102	100	96	90	82	78
Sun	78	79	79	79	78	78	78	78	78	78	78	78	79	79	79	79	80	80	80	80	80	80	80	80
Mon	80	80	81	82	82	83	84	85	86	86	86	87	87	87	88	88	89	89	90	91	91	92	93	93
Tue	93	93	93	92	92	92	91	91	90	90	90	91	91	91	91	90	91	96	99	98	95	90	85	83

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	110.8Unhealthy for Sensitive Groups	158	38.5	168 / 168
Hai Phong	90.1Moderate	144	29.2	168 / 168
Can Tho	82Moderate	115	26.2	168 / 168
Da Nang	80.7Moderate	197	20.2	168 / 168
Hue	80.6Moderate	174	24.6	168 / 168
Ho Chi Minh City	70.9Moderate	131	20	168 / 168
Nha Trang	63.7Moderate	75	16.1	168 / 168
Da Lat	54.6Moderate	70	11.6	168 / 168

City-hours by category

Good: 47

Moderate: 1098

Unhealthy for Sensitive Groups: 151

Unhealthy: 48

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	76	76	76	76	75	75	74	73	72	72	71	71	71	71	70	70	73	76	77	76	73	71	69	69
Thu	69	68	68	68	67	67	67	66	66	65	65	65	65	66	70	74	77	81	82	81	78	73	68	66
Fri	66	67	67	68	68	68	69	69	69	70	70	70	70	70	71	74	80	84	85	84	80	76	74	72
Sat	72	73	73	73	73	73	73	74	74	74	74	74	78	79	84	92	99	102	102	100	96	90	82	78
Sun	78	79	79	79	78	78	78	78	78	78	78	78	79	79	79	79	80	80	80	80	80	80	80	80
Mon	80	80	81	82	82	83	84	85	86	86	86	87	87	87	88	88	89	89	90	91	91	92	93	93
Tue	93	93	93	92	92	92	91	91	90	90	90	91	91	91	91	90	91	96	99	98	95	90	85	83

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	76	76	76	76	75	75	74	73	72	72	71	71	71	71	70	70	73	76	77	76	73	71	69	69
Thu	69	68	68	68	67	67	67	66	66	65	65	65	65	66	70	74	77	81	82	81	78	73	68	66
Fri	66	67	67	68	68	68	69	69	69	70	70	70	70	70	71	74	80	84	85	84	80	76	74	72
Sat	72	73	73	73	73	73	73	74	74	74	74	74	78	79	84	92	99	102	102	100	96	90	82	78
Sun	78	79	79	79	78	78	78	78	78	78	78	78	79	79	79	79	80	80	80	80	80	80	80	80
Mon	80	80	81	82	82	83	84	85	86	86	86	87	87	87	88	88	89	89	90	91	91	92	93	93
Tue	93	93	93	92	92	92	91	91	90	90	90	91	91	91	91	90	91	96	99	98	95	90	85	83

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	76	76	76	76	75	75	74	73	72	72	71	71	71	71	70	70	73	76	77	76	73	71	69	69
Thu	69	68	68	68	67	67	67	66	66	65	65	65	65	66	70	74	77	81	82	81	78	73	68	66
Fri	66	67	67	68	68	68	69	69	69	70	70	70	70	70	71	74	80	84	85	84	80	76	74	72
Sat	72	73	73	73	73	73	73	74	74	74	74	74	78	79	84	92	99	102	102	100	96	90	82	78
Sun	78	79	79	79	78	78	78	78	78	78	78	78	79	79	79	79	80	80	80	80	80	80	80	80
Mon	80	80	81	82	82	83	84	85	86	86	86	87	87	87	88	88	89	89	90	91	91	92	93	93
Tue	93	93	93	92	92	92	91	91	90	90	90	91	91	91	91	90	91	96	99	98	95	90	85	83