28 Dec 2022 – 3 Jan 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

87.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 27.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-5 AQI compared with the previous week’s mean of 92.3.

Highest hourly estimate: 173 in Hanoi · 2 Jan, 08:00 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, 28 Dec	84.1Moderate	32–145	27.2	192 / 192
Thu, 29 Dec	84.2Moderate	33–144	26.7	192 / 192
Fri, 30 Dec	86Moderate	36–127	30.5	192 / 192
Sat, 31 Dec	97.6Moderate	44–151	32.7	192 / 192
Sun, 1 Jan	94.6Moderate	38–154	30.4	192 / 192
Mon, 2 Jan	91.3Moderate	34–173	27.7	192 / 192
Tue, 3 Jan	73.6Moderate	34–158	20.4	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	84	84	83	83	82	81	81	81	82	83	84	84	84	85	85	86	86	87	87	86	86	85	85	85
Thu	85	85	85	85	85	84	84	84	84	83	83	82	82	82	82	82	82	85	87	86	86	86	86	86
Fri	85	85	84	84	85	85	85	85	85	85	84	85	85	85	85	86	86	87	87	87	89	89	91	92
Sat	93	95	96	98	99	100	100	100	100	100	100	99	99	98	98	97	97	96	96	96	96	97	97	98
Sun	98	97	96	96	95	95	94	94	94	94	94	94	94	95	95	95	95	95	95	94	94	94	93	93
Mon	93	92	92	93	93	93	93	93	93	93	92	92	92	92	92	91	91	91	91	90	89	88	87	86
Tue	85	84	83	81	79	77	75	74	73	72	72	72	71	71	70	70	70	70	69	70	69	70	70	71

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	120.4Unhealthy for Sensitive Groups	173	45.7	168 / 168
Ho Chi Minh City	114.2Unhealthy for Sensitive Groups	145	39.3	168 / 168
Hai Phong	109.3Unhealthy for Sensitive Groups	154	39.2	168 / 168
Can Tho	97.1Moderate	144	31.8	168 / 168
Da Nang	83Moderate	111	26	168 / 168
Hue	79.6Moderate	94	24.6	168 / 168
Nha Trang	55.9Moderate	68	12	168 / 168
Da Lat	39.3Good	50	5	168 / 168

City-hours by category

Good: 190

Moderate: 756

Unhealthy for Sensitive Groups: 337

Unhealthy: 61

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	84	84	83	83	82	81	81	81	82	83	84	84	84	85	85	86	86	87	87	86	86	85	85	85
Thu	85	85	85	85	85	84	84	84	84	83	83	82	82	82	82	82	82	85	87	86	86	86	86	86
Fri	85	85	84	84	85	85	85	85	85	85	84	85	85	85	85	86	86	87	87	87	89	89	91	92
Sat	93	95	96	98	99	100	100	100	100	100	100	99	99	98	98	97	97	96	96	96	96	97	97	98
Sun	98	97	96	96	95	95	94	94	94	94	94	94	94	95	95	95	95	95	95	94	94	94	93	93
Mon	93	92	92	93	93	93	93	93	93	93	92	92	92	92	92	91	91	91	91	90	89	88	87	86
Tue	85	84	83	81	79	77	75	74	73	72	72	72	71	71	70	70	70	70	69	70	69	70	70	71

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	84	84	83	83	82	81	81	81	82	83	84	84	84	85	85	86	86	87	87	86	86	85	85	85
Thu	85	85	85	85	85	84	84	84	84	83	83	82	82	82	82	82	82	85	87	86	86	86	86	86
Fri	85	85	84	84	85	85	85	85	85	85	84	85	85	85	85	86	86	87	87	87	89	89	91	92
Sat	93	95	96	98	99	100	100	100	100	100	100	99	99	98	98	97	97	96	96	96	96	97	97	98
Sun	98	97	96	96	95	95	94	94	94	94	94	94	94	95	95	95	95	95	95	94	94	94	93	93
Mon	93	92	92	93	93	93	93	93	93	93	92	92	92	92	92	91	91	91	91	90	89	88	87	86
Tue	85	84	83	81	79	77	75	74	73	72	72	72	71	71	70	70	70	70	69	70	69	70	70	71

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	84	84	83	83	82	81	81	81	82	83	84	84	84	85	85	86	86	87	87	86	86	85	85	85
Thu	85	85	85	85	85	84	84	84	84	83	83	82	82	82	82	82	82	85	87	86	86	86	86	86
Fri	85	85	84	84	85	85	85	85	85	85	84	85	85	85	85	86	86	87	87	87	89	89	91	92
Sat	93	95	96	98	99	100	100	100	100	100	100	99	99	98	98	97	97	96	96	96	96	97	97	98
Sun	98	97	96	96	95	95	94	94	94	94	94	94	94	95	95	95	95	95	95	94	94	94	93	93
Mon	93	92	92	93	93	93	93	93	93	93	92	92	92	92	92	91	91	91	91	90	89	88	87	86
Tue	85	84	83	81	79	77	75	74	73	72	72	72	71	71	70	70	70	70	69	70	69	70	70	71