11 – 17 Jan 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 26.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+0.8 AQI compared with the previous week’s mean of 82.9.

Highest hourly estimate: 189 in Hanoi · 11 Jan, 00:00 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, 11 Jan	80.4Moderate	22–189	26.1	192 / 192
Thu, 12 Jan	81.8Moderate	35–164	24.6	192 / 192
Fri, 13 Jan	74.3Moderate	51–156	22.4	192 / 192
Sat, 14 Jan	89.8Moderate	52–160	38.2	192 / 192
Sun, 15 Jan	103.4Unhealthy for Sensitive Groups	51–168	28.8	192 / 192
Mon, 16 Jan	82.1Moderate	50–147	22.1	192 / 192
Tue, 17 Jan	74.2Moderate	32–161	22.6	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	83	83	82	82	82	82	81	81	81	81	80	80	80	79	80	79	79	79	79	79	79	79	80	80
Thu	80	80	80	80	81	81	81	81	82	82	82	82	82	83	83	83	83	83	83	83	82	82	82	82
Fri	81	80	80	79	79	78	76	75	74	72	71	71	70	70	71	71	72	72	72	73	73	74	74	75
Sat	76	76	77	78	79	80	81	83	84	85	86	87	89	90	93	95	96	99	103	105	104	102	103	104
Sun	105	106	107	107	107	107	107	108	107	108	108	109	108	107	105	103	102	100	99	97	96	95	93	91
Mon	89	87	87	86	86	85	84	84	84	83	82	82	81	81	81	81	80	80	80	80	79	78	77	76
Tue	75	74	73	72	71	71	71	71	71	71	71	71	72	72	72	73	74	76	80	82	82	80	79	79

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	124.9Unhealthy for Sensitive Groups	189	44	168 / 168
Hai Phong	120.1Unhealthy for Sensitive Groups	188	42.3	168 / 168
Ho Chi Minh City	94.4Moderate	161	33.7	168 / 168
Can Tho	77.2Moderate	128	24.6	168 / 168
Da Nang	74.9Moderate	128	22.2	168 / 168
Hue	70Moderate	96	19.8	168 / 168
Nha Trang	62.2Moderate	75	15.6	168 / 168
Da Lat	46.1Good	58	8.9	168 / 168

City-hours by category

Good: 91

Moderate: 924

Unhealthy for Sensitive Groups: 193

Unhealthy: 136

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	83	83	82	82	82	82	81	81	81	81	80	80	80	79	80	79	79	79	79	79	79	79	80	80
Thu	80	80	80	80	81	81	81	81	82	82	82	82	82	83	83	83	83	83	83	83	82	82	82	82
Fri	81	80	80	79	79	78	76	75	74	72	71	71	70	70	71	71	72	72	72	73	73	74	74	75
Sat	76	76	77	78	79	80	81	83	84	85	86	87	89	90	93	95	96	99	103	105	104	102	103	104
Sun	105	106	107	107	107	107	107	108	107	108	108	109	108	107	105	103	102	100	99	97	96	95	93	91
Mon	89	87	87	86	86	85	84	84	84	83	82	82	81	81	81	81	80	80	80	80	79	78	77	76
Tue	75	74	73	72	71	71	71	71	71	71	71	71	72	72	72	73	74	76	80	82	82	80	79	79

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	83	83	82	82	82	82	81	81	81	81	80	80	80	79	80	79	79	79	79	79	79	79	80	80
Thu	80	80	80	80	81	81	81	81	82	82	82	82	82	83	83	83	83	83	83	83	82	82	82	82
Fri	81	80	80	79	79	78	76	75	74	72	71	71	70	70	71	71	72	72	72	73	73	74	74	75
Sat	76	76	77	78	79	80	81	83	84	85	86	87	89	90	93	95	96	99	103	105	104	102	103	104
Sun	105	106	107	107	107	107	107	108	107	108	108	109	108	107	105	103	102	100	99	97	96	95	93	91
Mon	89	87	87	86	86	85	84	84	84	83	82	82	81	81	81	81	80	80	80	80	79	78	77	76
Tue	75	74	73	72	71	71	71	71	71	71	71	71	72	72	72	73	74	76	80	82	82	80	79	79

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	83	83	82	82	82	82	81	81	81	81	80	80	80	79	80	79	79	79	79	79	79	79	80	80
Thu	80	80	80	80	81	81	81	81	82	82	82	82	82	83	83	83	83	83	83	83	82	82	82	82
Fri	81	80	80	79	79	78	76	75	74	72	71	71	70	70	71	71	72	72	72	73	73	74	74	75
Sat	76	76	77	78	79	80	81	83	84	85	86	87	89	90	93	95	96	99	103	105	104	102	103	104
Sun	105	106	107	107	107	107	107	108	107	108	108	109	108	107	105	103	102	100	99	97	96	95	93	91
Mon	89	87	87	86	86	85	84	84	84	83	82	82	81	81	81	81	80	80	80	80	79	78	77	76
Tue	75	74	73	72	71	71	71	71	71	71	71	71	72	72	72	73	74	76	80	82	82	80	79	79