1 – 7 Feb 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

92.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 38.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+2.6 AQI compared with the previous week’s mean of 90.3.

Highest hourly estimate: 313 in Hai Phong · 2 Feb, 12:00 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, 1 Feb	96.6Moderate	28–254	49.2	192 / 192
Thu, 2 Feb	111.7Unhealthy for Sensitive Groups	25–313	51.6	192 / 192
Fri, 3 Feb	93.8Moderate	21–291	36.6	192 / 192
Sat, 4 Feb	82.2Moderate	21–204	32.3	192 / 192
Sun, 5 Feb	85.6Moderate	32–218	32.6	192 / 192
Mon, 6 Feb	87.2Moderate	35–216	36.4	192 / 192
Tue, 7 Feb	93.3Moderate	52–232	31.6	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	98	97	96	95	94	94	93	93	93	93	93	92	92	92	93	94	96	99	104	103	101	103	105	107
Thu	109	111	112	113	114	115	115	114	114	114	115	115	114	114	114	112	112	111	110	109	108	107	106	105
Fri	104	103	101	101	99	98	98	98	96	95	94	93	93	92	91	90	90	89	90	89	89	88	87	86
Sat	85	84	84	83	83	82	82	82	82	82	81	81	81	81	81	81	81	81	82	82	82	83	83	83
Sun	84	85	85	85	86	86	86	86	86	86	86	86	86	86	86	86	86	87	86	86	86	86	85	85
Mon	85	85	85	85	85	85	85	85	86	86	86	87	87	87	87	88	88	89	89	90	90	91	92	92
Tue	92	93	93	93	94	94	94	94	94	94	94	94	94	95	95	95	95	95	95	95	93	91	89	88

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
Hai Phong	219.8Very Unhealthy	313	149.3	168 / 168
Hanoi	162.6Unhealthy	198	72.4	168 / 168
Ho Chi Minh City	75.6Moderate	140	19.7	168 / 168
Da Nang	66.5Moderate	93	16.8	168 / 168
Hue	66.1Moderate	84	17.5	168 / 168
Can Tho	62.1Moderate	100	14.1	168 / 168
Nha Trang	56.5Moderate	65	12.5	168 / 168
Da Lat	34.1Good	55	6.5	168 / 168

City-hours by category

Good: 185

Moderate: 784

Unhealthy for Sensitive Groups: 65

Unhealthy: 204

Very Unhealthy: 96

Hazardous: 10

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	98	97	96	95	94	94	93	93	93	93	93	92	92	92	93	94	96	99	104	103	101	103	105	107
Thu	109	111	112	113	114	115	115	114	114	114	115	115	114	114	114	112	112	111	110	109	108	107	106	105
Fri	104	103	101	101	99	98	98	98	96	95	94	93	93	92	91	90	90	89	90	89	89	88	87	86
Sat	85	84	84	83	83	82	82	82	82	82	81	81	81	81	81	81	81	81	82	82	82	83	83	83
Sun	84	85	85	85	86	86	86	86	86	86	86	86	86	86	86	86	86	87	86	86	86	86	85	85
Mon	85	85	85	85	85	85	85	85	86	86	86	87	87	87	87	88	88	89	89	90	90	91	92	92
Tue	92	93	93	93	94	94	94	94	94	94	94	94	94	95	95	95	95	95	95	95	93	91	89	88

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	98	97	96	95	94	94	93	93	93	93	93	92	92	92	93	94	96	99	104	103	101	103	105	107
Thu	109	111	112	113	114	115	115	114	114	114	115	115	114	114	114	112	112	111	110	109	108	107	106	105
Fri	104	103	101	101	99	98	98	98	96	95	94	93	93	92	91	90	90	89	90	89	89	88	87	86
Sat	85	84	84	83	83	82	82	82	82	82	81	81	81	81	81	81	81	81	82	82	82	83	83	83
Sun	84	85	85	85	86	86	86	86	86	86	86	86	86	86	86	86	86	87	86	86	86	86	85	85
Mon	85	85	85	85	85	85	85	85	86	86	86	87	87	87	87	88	88	89	89	90	90	91	92	92
Tue	92	93	93	93	94	94	94	94	94	94	94	94	94	95	95	95	95	95	95	95	93	91	89	88

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	98	97	96	95	94	94	93	93	93	93	93	92	92	92	93	94	96	99	104	103	101	103	105	107
Thu	109	111	112	113	114	115	115	114	114	114	115	115	114	114	114	112	112	111	110	109	108	107	106	105
Fri	104	103	101	101	99	98	98	98	96	95	94	93	93	92	91	90	90	89	90	89	89	88	87	86
Sat	85	84	84	83	83	82	82	82	82	82	81	81	81	81	81	81	81	81	82	82	82	83	83	83
Sun	84	85	85	85	86	86	86	86	86	86	86	86	86	86	86	86	86	87	86	86	86	86	85	85
Mon	85	85	85	85	85	85	85	85	86	86	86	87	87	87	87	88	88	89	89	90	90	91	92	92
Tue	92	93	93	93	94	94	94	94	94	94	94	94	94	95	95	95	95	95	95	95	93	91	89	88