30 Apr – 6 May 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

95.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 28.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-12.3 AQI compared with the previous week’s mean of 107.8.

Highest hourly estimate: 225 in Hanoi · 5 May, 18:00 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, 30 Apr	98.8Moderate	54–202	29.3	192 / 192
Thu, 1 May	90.5Moderate	52–164	27.6	192 / 192
Fri, 2 May	95.9Moderate	54–217	33.1	192 / 192
Sat, 3 May	91Moderate	54–176	25.3	192 / 192
Sun, 4 May	97Moderate	54–206	30.9	192 / 192
Mon, 5 May	101.8Unhealthy for Sensitive Groups	56–225	28	192 / 192
Tue, 6 May	93.4Moderate	49–208	26.2	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	104	103	102	101	100	98	97	94	92	91	90	90	89	93	98	102	109	114	115	112	105	97	89	88
Thu	88	88	88	88	88	88	88	88	88	87	87	87	87	88	92	95	98	100	101	99	95	91	88	87
Fri	87	88	88	88	89	90	91	92	92	93	93	93	94	94	97	101	107	109	110	109	105	102	97	93
Sat	93	92	92	92	91	90	88	85	84	83	83	82	82	86	93	99	104	106	105	102	97	91	85	82
Sun	83	84	84	85	85	85	86	86	86	87	87	87	89	94	102	110	119	125	127	123	118	109	97	92
Mon	88	88	88	88	88	88	88	88	88	88	88	88	88	94	105	119	129	135	137	134	127	118	106	96
Tue	89	86	85	85	85	85	85	84	83	83	82	86	86	90	96	104	113	118	119	115	108	99	89	86

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	154.1Unhealthy	225	55.5	168 / 168
Can Tho	132.6Unhealthy for Sensitive Groups	179	54.1	168 / 168
Da Nang	102Unhealthy for Sensitive Groups	208	20.2	168 / 168
Hai Phong	95.5Moderate	162	29.9	168 / 168
Hue	88.2Moderate	183	20.9	168 / 168
Ho Chi Minh City	74.6Moderate	128	21.7	168 / 168
Nha Trang	61.1Moderate	84	14.8	168 / 168
Da Lat	55.7Moderate	65	12.1	168 / 168

City-hours by category

Good: 13

Moderate: 854

Unhealthy for Sensitive Groups: 230

Unhealthy: 228

Very Unhealthy: 19

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	104	103	102	101	100	98	97	94	92	91	90	90	89	93	98	102	109	114	115	112	105	97	89	88
Thu	88	88	88	88	88	88	88	88	88	87	87	87	87	88	92	95	98	100	101	99	95	91	88	87
Fri	87	88	88	88	89	90	91	92	92	93	93	93	94	94	97	101	107	109	110	109	105	102	97	93
Sat	93	92	92	92	91	90	88	85	84	83	83	82	82	86	93	99	104	106	105	102	97	91	85	82
Sun	83	84	84	85	85	85	86	86	86	87	87	87	89	94	102	110	119	125	127	123	118	109	97	92
Mon	88	88	88	88	88	88	88	88	88	88	88	88	88	94	105	119	129	135	137	134	127	118	106	96
Tue	89	86	85	85	85	85	85	84	83	83	82	86	86	90	96	104	113	118	119	115	108	99	89	86

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	104	103	102	101	100	98	97	94	92	91	90	90	89	93	98	102	109	114	115	112	105	97	89	88
Thu	88	88	88	88	88	88	88	88	88	87	87	87	87	88	92	95	98	100	101	99	95	91	88	87
Fri	87	88	88	88	89	90	91	92	92	93	93	93	94	94	97	101	107	109	110	109	105	102	97	93
Sat	93	92	92	92	91	90	88	85	84	83	83	82	82	86	93	99	104	106	105	102	97	91	85	82
Sun	83	84	84	85	85	85	86	86	86	87	87	87	89	94	102	110	119	125	127	123	118	109	97	92
Mon	88	88	88	88	88	88	88	88	88	88	88	88	88	94	105	119	129	135	137	134	127	118	106	96
Tue	89	86	85	85	85	85	85	84	83	83	82	86	86	90	96	104	113	118	119	115	108	99	89	86

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	104	103	102	101	100	98	97	94	92	91	90	90	89	93	98	102	109	114	115	112	105	97	89	88
Thu	88	88	88	88	88	88	88	88	88	87	87	87	87	88	92	95	98	100	101	99	95	91	88	87
Fri	87	88	88	88	89	90	91	92	92	93	93	93	94	94	97	101	107	109	110	109	105	102	97	93
Sat	93	92	92	92	91	90	88	85	84	83	83	82	82	86	93	99	104	106	105	102	97	91	85	82
Sun	83	84	84	85	85	85	86	86	86	87	87	87	89	94	102	110	119	125	127	123	118	109	97	92
Mon	88	88	88	88	88	88	88	88	88	88	88	88	88	94	105	119	129	135	137	134	127	118	106	96
Tue	89	86	85	85	85	85	85	84	83	83	82	86	86	90	96	104	113	118	119	115	108	99	89	86