23 – 29 Apr 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

107.8Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 36.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.8 AQI compared with the previous week’s mean of 106.

Highest hourly estimate: 271 in Da Nang · 26 Apr, 16:00 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, 23 Apr	108.9Unhealthy for Sensitive Groups	60–224	35.4	192 / 192
Thu, 24 Apr	112Unhealthy for Sensitive Groups	50–242	35.5	192 / 192
Fri, 25 Apr	110.6Unhealthy for Sensitive Groups	54–255	38.9	192 / 192
Sat, 26 Apr	119.2Unhealthy for Sensitive Groups	70–271	42.4	192 / 192
Sun, 27 Apr	106.7Unhealthy for Sensitive Groups	61–179	30.9	192 / 192
Mon, 28 Apr	90.9Moderate	60–174	29.6	192 / 192
Tue, 29 Apr	106.1Unhealthy for Sensitive Groups	56–201	41.6	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	89	90	91	92	93	94	94	95	96	96	98	100	101	106	115	127	137	142	143	140	134	125	114	101
Thu	99	99	100	100	100	100	100	100	101	101	104	106	108	111	117	126	133	138	139	136	129	119	114	109
Fri	105	101	101	101	100	99	98	97	97	98	102	104	105	110	116	121	127	131	134	132	127	120	116	113
Sat	110	110	112	112	114	115	116	116	117	117	119	120	120	122	125	127	130	132	131	127	122	118	114	114
Sun	114	114	114	113	113	112	111	109	108	106	104	102	100	100	105	110	113	114	112	107	102	96	92	91
Mon	90	90	89	88	87	86	85	84	84	83	83	83	83	86	92	100	104	108	108	104	98	92	87	88
Tue	90	92	93	95	96	98	99	101	103	104	104	104	104	105	110	114	118	122	123	123	118	115	110	105

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
Can Tho	149.9Unhealthy for Sensitive Groups	175	65.6	168 / 168
Hanoi	143.3Unhealthy for Sensitive Groups	216	58.3	168 / 168
Da Nang	142.3Unhealthy for Sensitive Groups	271	39.8	168 / 168
Hue	119.9Unhealthy for Sensitive Groups	210	36.6	168 / 168
Hai Phong	84.7Moderate	127	27.4	168 / 168
Ho Chi Minh City	81.1Moderate	110	25.8	168 / 168
Nha Trang	75.5Moderate	159	19.9	168 / 168
Da Lat	65.5Moderate	83	16.9	168 / 168

City-hours by category

Good: 1

Moderate: 754

Unhealthy for Sensitive Groups: 302

Unhealthy: 245

Very Unhealthy: 42

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	89	90	91	92	93	94	94	95	96	96	98	100	101	106	115	127	137	142	143	140	134	125	114	101
Thu	99	99	100	100	100	100	100	100	101	101	104	106	108	111	117	126	133	138	139	136	129	119	114	109
Fri	105	101	101	101	100	99	98	97	97	98	102	104	105	110	116	121	127	131	134	132	127	120	116	113
Sat	110	110	112	112	114	115	116	116	117	117	119	120	120	122	125	127	130	132	131	127	122	118	114	114
Sun	114	114	114	113	113	112	111	109	108	106	104	102	100	100	105	110	113	114	112	107	102	96	92	91
Mon	90	90	89	88	87	86	85	84	84	83	83	83	83	86	92	100	104	108	108	104	98	92	87	88
Tue	90	92	93	95	96	98	99	101	103	104	104	104	104	105	110	114	118	122	123	123	118	115	110	105

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	89	90	91	92	93	94	94	95	96	96	98	100	101	106	115	127	137	142	143	140	134	125	114	101
Thu	99	99	100	100	100	100	100	100	101	101	104	106	108	111	117	126	133	138	139	136	129	119	114	109
Fri	105	101	101	101	100	99	98	97	97	98	102	104	105	110	116	121	127	131	134	132	127	120	116	113
Sat	110	110	112	112	114	115	116	116	117	117	119	120	120	122	125	127	130	132	131	127	122	118	114	114
Sun	114	114	114	113	113	112	111	109	108	106	104	102	100	100	105	110	113	114	112	107	102	96	92	91
Mon	90	90	89	88	87	86	85	84	84	83	83	83	83	86	92	100	104	108	108	104	98	92	87	88
Tue	90	92	93	95	96	98	99	101	103	104	104	104	104	105	110	114	118	122	123	123	118	115	110	105

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	89	90	91	92	93	94	94	95	96	96	98	100	101	106	115	127	137	142	143	140	134	125	114	101
Thu	99	99	100	100	100	100	100	100	101	101	104	106	108	111	117	126	133	138	139	136	129	119	114	109
Fri	105	101	101	101	100	99	98	97	97	98	102	104	105	110	116	121	127	131	134	132	127	120	116	113
Sat	110	110	112	112	114	115	116	116	117	117	119	120	120	122	125	127	130	132	131	127	122	118	114	114
Sun	114	114	114	113	113	112	111	109	108	106	104	102	100	100	105	110	113	114	112	107	102	96	92	91
Mon	90	90	89	88	87	86	85	84	84	83	83	83	83	86	92	100	104	108	108	104	98	92	87	88
Tue	90	92	93	95	96	98	99	101	103	104	104	104	104	105	110	114	118	122	123	123	118	115	110	105