25 – 31 Mar 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

88.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 26.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+14.5 AQI compared with the previous week’s mean of 74.4.

Highest hourly estimate: 237 in Da Nang · 31 Mar, 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, 25 Mar	75.3Moderate	53–132	23.2	192 / 192
Thu, 26 Mar	85.4Moderate	59–177	25.4	192 / 192
Fri, 27 Mar	86.5Moderate	54–197	24.1	192 / 192
Sat, 28 Mar	86.6Moderate	60–199	25.3	192 / 192
Sun, 29 Mar	90.5Moderate	64–205	26.6	192 / 192
Mon, 30 Mar	91.6Moderate	60–201	29	192 / 192
Tue, 31 Mar	106.6Unhealthy for Sensitive Groups	64–237	34	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	71	71	71	71	71	71	71	72	72	73	73	74	74	74	75	78	82	86	87	83	79	77	76	77
Thu	77	77	78	78	78	79	79	79	79	79	79	80	80	80	84	91	98	104	106	104	99	92	87	83
Fri	82	82	81	80	80	80	79	79	79	79	79	79	79	78	85	93	100	105	108	106	100	95	89	82
Sat	79	79	80	80	81	81	81	81	81	81	81	81	81	81	86	95	100	104	104	102	97	93	87	82
Sun	81	81	82	82	83	84	85	86	86	86	86	86	86	86	91	99	105	108	108	106	102	97	92	87
Mon	84	84	83	83	82	81	80	80	80	80	81	82	83	84	86	95	108	116	120	119	113	106	98	93
Tue	90	89	89	89	88	88	87	87	87	87	89	92	95	96	102	114	129	142	148	148	144	136	128	115

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
Hue	116.6Unhealthy for Sensitive Groups	205	32.6	168 / 168
Hanoi	113.2Unhealthy for Sensitive Groups	202	41.1	168 / 168
Can Tho	104.1Unhealthy for Sensitive Groups	136	38.3	168 / 168
Da Nang	95.7Moderate	237	23.7	168 / 168
Hai Phong	76.8Moderate	178	22.6	168 / 168
Nha Trang	73.9Moderate	95	21.9	168 / 168
Da Lat	66.5Moderate	103	17.5	168 / 168
Ho Chi Minh City	64.7Moderate	85	16.8	168 / 168

City-hours by category

Good: 0

Moderate: 1055

Unhealthy for Sensitive Groups: 209

Unhealthy: 65

Very Unhealthy: 15

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	71	71	71	71	71	71	71	72	72	73	73	74	74	74	75	78	82	86	87	83	79	77	76	77
Thu	77	77	78	78	78	79	79	79	79	79	79	80	80	80	84	91	98	104	106	104	99	92	87	83
Fri	82	82	81	80	80	80	79	79	79	79	79	79	79	78	85	93	100	105	108	106	100	95	89	82
Sat	79	79	80	80	81	81	81	81	81	81	81	81	81	81	86	95	100	104	104	102	97	93	87	82
Sun	81	81	82	82	83	84	85	86	86	86	86	86	86	86	91	99	105	108	108	106	102	97	92	87
Mon	84	84	83	83	82	81	80	80	80	80	81	82	83	84	86	95	108	116	120	119	113	106	98	93
Tue	90	89	89	89	88	88	87	87	87	87	89	92	95	96	102	114	129	142	148	148	144	136	128	115

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	71	71	71	71	71	71	71	72	72	73	73	74	74	74	75	78	82	86	87	83	79	77	76	77
Thu	77	77	78	78	78	79	79	79	79	79	79	80	80	80	84	91	98	104	106	104	99	92	87	83
Fri	82	82	81	80	80	80	79	79	79	79	79	79	79	78	85	93	100	105	108	106	100	95	89	82
Sat	79	79	80	80	81	81	81	81	81	81	81	81	81	81	86	95	100	104	104	102	97	93	87	82
Sun	81	81	82	82	83	84	85	86	86	86	86	86	86	86	91	99	105	108	108	106	102	97	92	87
Mon	84	84	83	83	82	81	80	80	80	80	81	82	83	84	86	95	108	116	120	119	113	106	98	93
Tue	90	89	89	89	88	88	87	87	87	87	89	92	95	96	102	114	129	142	148	148	144	136	128	115

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	71	71	71	71	71	71	71	72	72	73	73	74	74	74	75	78	82	86	87	83	79	77	76	77
Thu	77	77	78	78	78	79	79	79	79	79	79	80	80	80	84	91	98	104	106	104	99	92	87	83
Fri	82	82	81	80	80	80	79	79	79	79	79	79	79	78	85	93	100	105	108	106	100	95	89	82
Sat	79	79	80	80	81	81	81	81	81	81	81	81	81	81	86	95	100	104	104	102	97	93	87	82
Sun	81	81	82	82	83	84	85	86	86	86	86	86	86	86	91	99	105	108	108	106	102	97	92	87
Mon	84	84	83	83	82	81	80	80	80	80	81	82	83	84	86	95	108	116	120	119	113	106	98	93
Tue	90	89	89	89	88	88	87	87	87	87	89	92	95	96	102	114	129	142	148	148	144	136	128	115