1 – 7 Jan 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

111.6Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 43.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+22.9 AQI compared with the previous week’s mean of 88.7.

Highest hourly estimate: 225 in Hai Phong · 1 Jan, 17:00 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 Jan	107.2Unhealthy for Sensitive Groups	32–225	54.1	192 / 192
Thu, 2 Jan	118.7Unhealthy for Sensitive Groups	34–203	43	192 / 192
Fri, 3 Jan	107.3Unhealthy for Sensitive Groups	31–199	42.8	192 / 192
Sat, 4 Jan	109.4Unhealthy for Sensitive Groups	37–190	37.7	192 / 192
Sun, 5 Jan	106.9Unhealthy for Sensitive Groups	45–178	40.9	192 / 192
Mon, 6 Jan	116.8Unhealthy for Sensitive Groups	38–200	49.6	192 / 192
Tue, 7 Jan	114.9Unhealthy for Sensitive Groups	45–193	39.5	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	97	97	97	98	99	100	100	101	102	103	105	106	107	108	109	110	112	114	115	117	118	119	119	120
Thu	121	122	123	123	123	124	124	124	123	122	122	121	120	119	118	117	116	117	117	116	114	110	108	107
Fri	106	105	104	104	104	104	104	105	105	105	105	105	105	105	105	105	106	109	111	112	114	115	116	116
Sat	115	115	114	113	111	110	109	108	107	106	106	106	107	107	108	109	111	112	113	112	110	107	106	105
Sun	104	102	101	101	102	102	103	104	103	104	104	104	105	106	108	108	110	114	116	117	115	113	111	112
Mon	112	112	113	113	113	113	113	113	113	113	114	115	115	116	118	120	121	122	124	124	124	123	122	120
Tue	120	119	119	118	118	118	117	117	117	117	117	116	116	115	115	114	114	113	113	112	111	109	109	108

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	185.5Unhealthy	200	105.2	168 / 168
Hai Phong	163.8Unhealthy	225	72.1	168 / 168
Can Tho	126.9Unhealthy for Sensitive Groups	159	49.4	168 / 168
Ho Chi Minh City	117.8Unhealthy for Sensitive Groups	151	43.5	168 / 168
Hue	98.8Moderate	134	33	168 / 168
Da Nang	95.3Moderate	160	25	168 / 168
Nha Trang	60.2Moderate	77	14.8	168 / 168
Da Lat	44.4Good	56	8.3	168 / 168

City-hours by category

Good: 138

Moderate: 478

Unhealthy for Sensitive Groups: 352

Unhealthy: 358

Very Unhealthy: 18

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	97	97	97	98	99	100	100	101	102	103	105	106	107	108	109	110	112	114	115	117	118	119	119	120
Thu	121	122	123	123	123	124	124	124	123	122	122	121	120	119	118	117	116	117	117	116	114	110	108	107
Fri	106	105	104	104	104	104	104	105	105	105	105	105	105	105	105	105	106	109	111	112	114	115	116	116
Sat	115	115	114	113	111	110	109	108	107	106	106	106	107	107	108	109	111	112	113	112	110	107	106	105
Sun	104	102	101	101	102	102	103	104	103	104	104	104	105	106	108	108	110	114	116	117	115	113	111	112
Mon	112	112	113	113	113	113	113	113	113	113	114	115	115	116	118	120	121	122	124	124	124	123	122	120
Tue	120	119	119	118	118	118	117	117	117	117	117	116	116	115	115	114	114	113	113	112	111	109	109	108

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	97	97	97	98	99	100	100	101	102	103	105	106	107	108	109	110	112	114	115	117	118	119	119	120
Thu	121	122	123	123	123	124	124	124	123	122	122	121	120	119	118	117	116	117	117	116	114	110	108	107
Fri	106	105	104	104	104	104	104	105	105	105	105	105	105	105	105	105	106	109	111	112	114	115	116	116
Sat	115	115	114	113	111	110	109	108	107	106	106	106	107	107	108	109	111	112	113	112	110	107	106	105
Sun	104	102	101	101	102	102	103	104	103	104	104	104	105	106	108	108	110	114	116	117	115	113	111	112
Mon	112	112	113	113	113	113	113	113	113	113	114	115	115	116	118	120	121	122	124	124	124	123	122	120
Tue	120	119	119	118	118	118	117	117	117	117	117	116	116	115	115	114	114	113	113	112	111	109	109	108

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	97	97	97	98	99	100	100	101	102	103	105	106	107	108	109	110	112	114	115	117	118	119	119	120
Thu	121	122	123	123	123	124	124	124	123	122	122	121	120	119	118	117	116	117	117	116	114	110	108	107
Fri	106	105	104	104	104	104	104	105	105	105	105	105	105	105	105	105	106	109	111	112	114	115	116	116
Sat	115	115	114	113	111	110	109	108	107	106	106	106	107	107	108	109	111	112	113	112	110	107	106	105
Sun	104	102	101	101	102	102	103	104	103	104	104	104	105	106	108	108	110	114	116	117	115	113	111	112
Mon	112	112	113	113	113	113	113	113	113	113	114	115	115	116	118	120	121	122	124	124	124	123	122	120
Tue	120	119	119	118	118	118	117	117	117	117	117	116	116	115	115	114	114	113	113	112	111	109	109	108