16 – 22 Apr 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

106Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 32.3 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 108.6.

Highest hourly estimate: 250 in Da Nang · 18 Apr, 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, 16 Apr	115.2Unhealthy for Sensitive Groups	65–209	40.4	192 / 192
Thu, 17 Apr	115.3Unhealthy for Sensitive Groups	69–237	38.3	192 / 192
Fri, 18 Apr	118.3Unhealthy for Sensitive Groups	69–250	36.4	192 / 192
Sat, 19 Apr	109.9Unhealthy for Sensitive Groups	66–220	30.2	192 / 192
Sun, 20 Apr	96.8Moderate	64–213	26.9	192 / 192
Mon, 21 Apr	90.5Moderate	56–186	25.3	192 / 192
Tue, 22 Apr	96.2Moderate	56–221	28.6	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	116	114	114	114	113	113	112	112	112	111	111	111	111	112	115	120	125	128	128	125	120	114	109	108
Thu	108	109	110	110	110	108	107	106	105	104	104	107	109	111	116	122	129	134	136	134	130	127	121	114
Fri	110	107	107	106	106	106	106	105	105	105	107	108	108	113	118	126	141	151	152	149	141	132	121	111
Sat	105	104	104	103	103	102	102	101	102	101	101	101	101	101	104	119	131	136	137	134	127	118	107	97
Sun	92	91	91	91	91	90	90	91	90	90	90	89	89	89	96	106	114	119	120	117	110	101	91	86
Mon	85	85	84	84	84	84	84	84	83	83	82	82	82	86	91	99	107	113	115	112	104	95	84	82
Tue	82	82	82	82	83	83	83	83	83	83	83	84	87	90	98	111	121	125	126	125	121	115	106	93

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	153.3Unhealthy	221	51.1	168 / 168
Can Tho	132.6Unhealthy for Sensitive Groups	163	51.8	168 / 168
Da Nang	129Unhealthy for Sensitive Groups	250	32.4	168 / 168
Hue	116.3Unhealthy for Sensitive Groups	191	33.3	168 / 168
Hai Phong	100.4Unhealthy for Sensitive Groups	183	29.8	168 / 168
Ho Chi Minh City	75.8Moderate	91	21.9	168 / 168
Nha Trang	72.9Moderate	98	19.8	168 / 168
Da Lat	68.1Moderate	86	18.3	168 / 168

City-hours by category

Good: 0

Moderate: 782

Unhealthy for Sensitive Groups: 323

Unhealthy: 192

Very Unhealthy: 47

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	116	114	114	114	113	113	112	112	112	111	111	111	111	112	115	120	125	128	128	125	120	114	109	108
Thu	108	109	110	110	110	108	107	106	105	104	104	107	109	111	116	122	129	134	136	134	130	127	121	114
Fri	110	107	107	106	106	106	106	105	105	105	107	108	108	113	118	126	141	151	152	149	141	132	121	111
Sat	105	104	104	103	103	102	102	101	102	101	101	101	101	101	104	119	131	136	137	134	127	118	107	97
Sun	92	91	91	91	91	90	90	91	90	90	90	89	89	89	96	106	114	119	120	117	110	101	91	86
Mon	85	85	84	84	84	84	84	84	83	83	82	82	82	86	91	99	107	113	115	112	104	95	84	82
Tue	82	82	82	82	83	83	83	83	83	83	83	84	87	90	98	111	121	125	126	125	121	115	106	93

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	116	114	114	114	113	113	112	112	112	111	111	111	111	112	115	120	125	128	128	125	120	114	109	108
Thu	108	109	110	110	110	108	107	106	105	104	104	107	109	111	116	122	129	134	136	134	130	127	121	114
Fri	110	107	107	106	106	106	106	105	105	105	107	108	108	113	118	126	141	151	152	149	141	132	121	111
Sat	105	104	104	103	103	102	102	101	102	101	101	101	101	101	104	119	131	136	137	134	127	118	107	97
Sun	92	91	91	91	91	90	90	91	90	90	90	89	89	89	96	106	114	119	120	117	110	101	91	86
Mon	85	85	84	84	84	84	84	84	83	83	82	82	82	86	91	99	107	113	115	112	104	95	84	82
Tue	82	82	82	82	83	83	83	83	83	83	83	84	87	90	98	111	121	125	126	125	121	115	106	93

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	116	114	114	114	113	113	112	112	112	111	111	111	111	112	115	120	125	128	128	125	120	114	109	108
Thu	108	109	110	110	110	108	107	106	105	104	104	107	109	111	116	122	129	134	136	134	130	127	121	114
Fri	110	107	107	106	106	106	106	105	105	105	107	108	108	113	118	126	141	151	152	149	141	132	121	111
Sat	105	104	104	103	103	102	102	101	102	101	101	101	101	101	104	119	131	136	137	134	127	118	107	97
Sun	92	91	91	91	91	90	90	91	90	90	90	89	89	89	96	106	114	119	120	117	110	101	91	86
Mon	85	85	84	84	84	84	84	84	83	83	82	82	82	86	91	99	107	113	115	112	104	95	84	82
Tue	82	82	82	82	83	83	83	83	83	83	83	84	87	90	98	111	121	125	126	125	121	115	106	93