27 Mar – 2 Apr 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

82.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 23.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+7.8 AQI compared with the previous week’s mean of 74.3.

Highest hourly estimate: 229 in Hanoi · 1 Apr, 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, 27 Mar	69.6Moderate	37–125	18.3	192 / 192
Thu, 28 Mar	71Moderate	52–138	22.6	192 / 192
Fri, 29 Mar	83.4Moderate	59–174	24.9	192 / 192
Sat, 30 Mar	77.8Moderate	50–152	19.5	192 / 192
Sun, 31 Mar	88.3Moderate	50–228	30.1	192 / 192
Mon, 1 Apr	94.8Moderate	53–229	24	192 / 192
Tue, 2 Apr	89.8Moderate	52–229	25.5	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	66	66	67	67	68	68	68	68	69	69	69	69	69	69	70	73	75	77	77	75	71	68	68	68
Thu	68	67	67	67	67	67	66	66	66	66	67	67	67	67	71	74	79	83	83	81	77	73	73	75
Fri	76	77	78	78	79	79	80	80	81	81	81	82	82	83	88	92	94	95	94	92	88	83	82	82
Sat	81	80	80	79	79	78	78	77	76	76	75	74	73	73	76	79	85	88	87	84	78	71	71	70
Sun	70	70	70	70	70	70	70	71	72	74	78	82	86	88	96	103	109	117	122	120	116	108	100	91
Mon	90	90	90	90	90	90	90	90	90	89	88	87	88	87	92	97	107	113	115	113	109	103	94	83
Tue	79	79	79	79	79	79	79	79	80	81	81	81	82	84	90	100	109	115	117	114	109	102	92	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	129Unhealthy for Sensitive Groups	229	45.4	168 / 168
Da Nang	102.7Unhealthy for Sensitive Groups	228	24.3	168 / 168
Hue	90.1Moderate	149	27.9	168 / 168
Hai Phong	89.1Moderate	170	27.7	168 / 168
Ho Chi Minh City	64.3Moderate	71	17.1	168 / 168
Can Tho	63.7Moderate	74	17	168 / 168
Da Lat	59.1Moderate	76	15.5	168 / 168
Nha Trang	59Moderate	67	13.5	168 / 168

City-hours by category

Good: 34

Moderate: 1045

Unhealthy for Sensitive Groups: 194

Unhealthy: 47

Very Unhealthy: 24

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	66	66	67	67	68	68	68	68	69	69	69	69	69	69	70	73	75	77	77	75	71	68	68	68
Thu	68	67	67	67	67	67	66	66	66	66	67	67	67	67	71	74	79	83	83	81	77	73	73	75
Fri	76	77	78	78	79	79	80	80	81	81	81	82	82	83	88	92	94	95	94	92	88	83	82	82
Sat	81	80	80	79	79	78	78	77	76	76	75	74	73	73	76	79	85	88	87	84	78	71	71	70
Sun	70	70	70	70	70	70	70	71	72	74	78	82	86	88	96	103	109	117	122	120	116	108	100	91
Mon	90	90	90	90	90	90	90	90	90	89	88	87	88	87	92	97	107	113	115	113	109	103	94	83
Tue	79	79	79	79	79	79	79	79	80	81	81	81	82	84	90	100	109	115	117	114	109	102	92	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	66	66	67	67	68	68	68	68	69	69	69	69	69	69	70	73	75	77	77	75	71	68	68	68
Thu	68	67	67	67	67	67	66	66	66	66	67	67	67	67	71	74	79	83	83	81	77	73	73	75
Fri	76	77	78	78	79	79	80	80	81	81	81	82	82	83	88	92	94	95	94	92	88	83	82	82
Sat	81	80	80	79	79	78	78	77	76	76	75	74	73	73	76	79	85	88	87	84	78	71	71	70
Sun	70	70	70	70	70	70	70	71	72	74	78	82	86	88	96	103	109	117	122	120	116	108	100	91
Mon	90	90	90	90	90	90	90	90	90	89	88	87	88	87	92	97	107	113	115	113	109	103	94	83
Tue	79	79	79	79	79	79	79	79	80	81	81	81	82	84	90	100	109	115	117	114	109	102	92	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	66	66	67	67	68	68	68	68	69	69	69	69	69	69	70	73	75	77	77	75	71	68	68	68
Thu	68	67	67	67	67	67	66	66	66	66	67	67	67	67	71	74	79	83	83	81	77	73	73	75
Fri	76	77	78	78	79	79	80	80	81	81	81	82	82	83	88	92	94	95	94	92	88	83	82	82
Sat	81	80	80	79	79	78	78	77	76	76	75	74	73	73	76	79	85	88	87	84	78	71	71	70
Sun	70	70	70	70	70	70	70	71	72	74	78	82	86	88	96	103	109	117	122	120	116	108	100	91
Mon	90	90	90	90	90	90	90	90	90	89	88	87	88	87	92	97	107	113	115	113	109	103	94	83
Tue	79	79	79	79	79	79	79	79	80	81	81	81	82	84	90	100	109	115	117	114	109	102	92	83