29 Apr – 5 May 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

92.4Weekly mean modelled AQI · Moderate

Mean PM2.5: 26.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-3.6 AQI compared with the previous week’s mean of 96.

Highest hourly estimate: 284 in Da Nang · 29 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, 29 Apr	106.8Unhealthy for Sensitive Groups	62–284	30.6	192 / 192
Thu, 30 Apr	95.4Moderate	58–193	25	192 / 192
Fri, 1 May	94.4Moderate	58–186	25.3	192 / 192
Sat, 2 May	83.3Moderate	59–167	24.9	192 / 192
Sun, 3 May	95.6Moderate	63–192	29.4	192 / 192
Mon, 4 May	87.6Moderate	61–163	26.3	192 / 192
Tue, 5 May	83.6Moderate	51–185	23.3	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	94	95	97	98	99	99	100	101	101	102	107	108	107	110	112	116	120	123	122	119	115	111	107	103
Thu	100	95	90	89	89	88	88	87	87	86	85	85	85	88	90	93	101	110	115	117	115	110	104	96
Fri	91	88	88	87	87	87	86	86	86	86	88	90	92	95	99	104	109	113	114	110	105	99	92	86
Sat	82	81	80	79	79	78	78	77	76	76	76	76	78	82	86	92	96	98	99	96	90	85	81	81
Sun	81	82	83	85	85	87	88	90	90	91	91	91	91	94	101	108	114	117	117	114	109	102	94	90
Mon	90	90	89	88	88	87	86	86	86	85	85	85	85	85	84	87	89	93	94	94	91	88	85	83
Tue	83	83	83	83	82	82	82	82	82	81	81	80	80	80	79	80	85	91	94	93	90	87	83	81

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	135.4Unhealthy for Sensitive Groups	163	51.8	168 / 168
Hanoi	117.9Unhealthy for Sensitive Groups	185	39.4	168 / 168
Da Nang	109.5Unhealthy for Sensitive Groups	284	21	168 / 168
Hue	88.5Moderate	168	21.7	168 / 168
Hai Phong	76.5Moderate	134	19.3	168 / 168
Ho Chi Minh City	71.4Moderate	90	20	168 / 168
Nha Trang	71.4Moderate	108	19.8	168 / 168
Da Lat	68.4Moderate	83	18.1	168 / 168

City-hours by category

Good: 0

Moderate: 940

Unhealthy for Sensitive Groups: 291

Unhealthy: 102

Very Unhealthy: 11

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	94	95	97	98	99	99	100	101	101	102	107	108	107	110	112	116	120	123	122	119	115	111	107	103
Thu	100	95	90	89	89	88	88	87	87	86	85	85	85	88	90	93	101	110	115	117	115	110	104	96
Fri	91	88	88	87	87	87	86	86	86	86	88	90	92	95	99	104	109	113	114	110	105	99	92	86
Sat	82	81	80	79	79	78	78	77	76	76	76	76	78	82	86	92	96	98	99	96	90	85	81	81
Sun	81	82	83	85	85	87	88	90	90	91	91	91	91	94	101	108	114	117	117	114	109	102	94	90
Mon	90	90	89	88	88	87	86	86	86	85	85	85	85	85	84	87	89	93	94	94	91	88	85	83
Tue	83	83	83	83	82	82	82	82	82	81	81	80	80	80	79	80	85	91	94	93	90	87	83	81

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	94	95	97	98	99	99	100	101	101	102	107	108	107	110	112	116	120	123	122	119	115	111	107	103
Thu	100	95	90	89	89	88	88	87	87	86	85	85	85	88	90	93	101	110	115	117	115	110	104	96
Fri	91	88	88	87	87	87	86	86	86	86	88	90	92	95	99	104	109	113	114	110	105	99	92	86
Sat	82	81	80	79	79	78	78	77	76	76	76	76	78	82	86	92	96	98	99	96	90	85	81	81
Sun	81	82	83	85	85	87	88	90	90	91	91	91	91	94	101	108	114	117	117	114	109	102	94	90
Mon	90	90	89	88	88	87	86	86	86	85	85	85	85	85	84	87	89	93	94	94	91	88	85	83
Tue	83	83	83	83	82	82	82	82	82	81	81	80	80	80	79	80	85	91	94	93	90	87	83	81

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	94	95	97	98	99	99	100	101	101	102	107	108	107	110	112	116	120	123	122	119	115	111	107	103
Thu	100	95	90	89	89	88	88	87	87	86	85	85	85	88	90	93	101	110	115	117	115	110	104	96
Fri	91	88	88	87	87	87	86	86	86	86	88	90	92	95	99	104	109	113	114	110	105	99	92	86
Sat	82	81	80	79	79	78	78	77	76	76	76	76	78	82	86	92	96	98	99	96	90	85	81	81
Sun	81	82	83	85	85	87	88	90	90	91	91	91	91	94	101	108	114	117	117	114	109	102	94	90
Mon	90	90	89	88	88	87	86	86	86	85	85	85	85	85	84	87	89	93	94	94	91	88	85	83
Tue	83	83	83	83	82	82	82	82	82	81	81	80	80	80	79	80	85	91	94	93	90	87	83	81