25 – 31 Jan 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

90.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 30.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+4.6 AQI compared with the previous week’s mean of 85.7.

Highest hourly estimate: 212 in Ho Chi Minh City · 31 Jan, 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 Jan	81.2Moderate	43–144	26.1	192 / 192
Thu, 26 Jan	86.7Moderate	32–140	26.8	192 / 192
Fri, 27 Jan	84.2Moderate	30–173	26	192 / 192
Sat, 28 Jan	78.7Moderate	33–121	24.4	192 / 192
Sun, 29 Jan	87Moderate	45–152	29.2	192 / 192
Mon, 30 Jan	106.2Unhealthy for Sensitive Groups	48–193	47.9	192 / 192
Tue, 31 Jan	108.4Unhealthy for Sensitive Groups	30–212	33.7	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	73	75	76	77	78	79	80	80	81	82	82	82	83	83	83	83	84	84	85	85	85	84	84	84
Thu	85	85	86	86	87	87	87	87	87	87	87	87	87	87	87	87	87	88	89	90	88	86	84	84
Fri	83	83	82	81	81	80	81	81	81	82	82	83	83	83	84	86	89	93	93	91	88	86	84	83
Sat	83	82	82	82	82	82	82	81	80	79	78	78	77	77	76	76	76	75	75	75	76	77	78	79
Sun	80	81	82	83	83	84	84	85	85	86	86	86	86	87	87	87	88	91	95	95	93	91	91	91
Mon	93	94	96	98	99	100	101	102	103	105	106	106	107	108	107	108	110	117	120	121	116	110	110	111
Tue	111	111	111	111	110	110	110	109	109	108	107	107	106	105	105	104	109	112	114	113	111	108	104	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	140.5Unhealthy for Sensitive Groups	193	59.4	168 / 168
Hai Phong	122.6Unhealthy for Sensitive Groups	193	50.5	168 / 168
Ho Chi Minh City	101.5Unhealthy for Sensitive Groups	212	34.4	168 / 168
Can Tho	89.8Moderate	157	28.9	168 / 168
Da Nang	82Moderate	108	24.9	168 / 168
Hue	79.4Moderate	102	25	168 / 168
Nha Trang	63.8Moderate	78	16.3	168 / 168
Da Lat	43.1Good	52	5.5	168 / 168

City-hours by category

Good: 157

Moderate: 771

Unhealthy for Sensitive Groups: 306

Unhealthy: 106

Very Unhealthy: 4

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	73	75	76	77	78	79	80	80	81	82	82	82	83	83	83	83	84	84	85	85	85	84	84	84
Thu	85	85	86	86	87	87	87	87	87	87	87	87	87	87	87	87	87	88	89	90	88	86	84	84
Fri	83	83	82	81	81	80	81	81	81	82	82	83	83	83	84	86	89	93	93	91	88	86	84	83
Sat	83	82	82	82	82	82	82	81	80	79	78	78	77	77	76	76	76	75	75	75	76	77	78	79
Sun	80	81	82	83	83	84	84	85	85	86	86	86	86	87	87	87	88	91	95	95	93	91	91	91
Mon	93	94	96	98	99	100	101	102	103	105	106	106	107	108	107	108	110	117	120	121	116	110	110	111
Tue	111	111	111	111	110	110	110	109	109	108	107	107	106	105	105	104	109	112	114	113	111	108	104	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	73	75	76	77	78	79	80	80	81	82	82	82	83	83	83	83	84	84	85	85	85	84	84	84
Thu	85	85	86	86	87	87	87	87	87	87	87	87	87	87	87	87	87	88	89	90	88	86	84	84
Fri	83	83	82	81	81	80	81	81	81	82	82	83	83	83	84	86	89	93	93	91	88	86	84	83
Sat	83	82	82	82	82	82	82	81	80	79	78	78	77	77	76	76	76	75	75	75	76	77	78	79
Sun	80	81	82	83	83	84	84	85	85	86	86	86	86	87	87	87	88	91	95	95	93	91	91	91
Mon	93	94	96	98	99	100	101	102	103	105	106	106	107	108	107	108	110	117	120	121	116	110	110	111
Tue	111	111	111	111	110	110	110	109	109	108	107	107	106	105	105	104	109	112	114	113	111	108	104	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	73	75	76	77	78	79	80	80	81	82	82	82	83	83	83	83	84	84	85	85	85	84	84	84
Thu	85	85	86	86	87	87	87	87	87	87	87	87	87	87	87	87	87	88	89	90	88	86	84	84
Fri	83	83	82	81	81	80	81	81	81	82	82	83	83	83	84	86	89	93	93	91	88	86	84	83
Sat	83	82	82	82	82	82	82	81	80	79	78	78	77	77	76	76	76	75	75	75	76	77	78	79
Sun	80	81	82	83	83	84	84	85	85	86	86	86	86	87	87	87	88	91	95	95	93	91	91	91
Mon	93	94	96	98	99	100	101	102	103	105	106	106	107	108	107	108	110	117	120	121	116	110	110	111
Tue	111	111	111	111	110	110	110	109	109	108	107	107	106	105	105	104	109	112	114	113	111	108	104	100