30 Jul – 5 Aug 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

96.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 29.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+9.8 AQI compared with the previous week’s mean of 86.8.

Highest hourly estimate: 228 in Hai Phong · 2 Aug, 19:00 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 Jul	88.5Moderate	30–214	26.5	192 / 192
Thu, 31 Jul	89.7Moderate	35–195	29.1	192 / 192
Fri, 1 Aug	94.2Moderate	46–191	25.3	192 / 192
Sat, 2 Aug	103.9Unhealthy for Sensitive Groups	55–228	33.5	192 / 192
Sun, 3 Aug	106.4Unhealthy for Sensitive Groups	57–219	30	192 / 192
Mon, 4 Aug	98.1Moderate	63–216	27.8	192 / 192
Tue, 5 Aug	95.8Moderate	63–223	33.6	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	99	95	90	85	85	84	84	83	83	82	82	82	82	82	83	85	94	100	102	101	99	93	85	83
Thu	83	83	83	83	82	82	82	82	83	83	84	84	84	85	89	93	101	107	109	107	102	97	94	91
Fri	88	88	88	88	89	89	89	89	89	88	88	87	87	87	90	94	101	108	113	115	112	106	99	92
Sat	88	84	84	85	86	87	89	90	91	92	92	93	93	98	99	112	126	132	135	134	132	129	125	119
Sun	110	106	102	98	98	99	99	98	97	97	97	97	97	101	101	109	123	129	129	125	121	115	108	101
Mon	94	91	91	90	90	89	89	88	87	87	86	86	86	86	91	100	112	121	124	122	119	115	108	101
Tue	95	89	85	85	85	84	84	84	84	85	85	85	90	92	94	100	107	113	115	115	113	111	110	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	146.5Unhealthy for Sensitive Groups	217	54.8	168 / 168
Hai Phong	142.5Unhealthy for Sensitive Groups	228	53.1	168 / 168
Da Nang	111.6Unhealthy for Sensitive Groups	223	20	168 / 168
Ho Chi Minh City	95.6Moderate	128	32.6	168 / 168
Nha Trang	81.7Moderate	170	21.4	168 / 168
Can Tho	75.3Moderate	91	22.4	168 / 168
Hue	65.8Moderate	113	17.8	168 / 168
Da Lat	54.1Moderate	72	13.4	168 / 168

City-hours by category

Good: 71

Moderate: 823

Unhealthy for Sensitive Groups: 222

Unhealthy: 183

Very Unhealthy: 45

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	99	95	90	85	85	84	84	83	83	82	82	82	82	82	83	85	94	100	102	101	99	93	85	83
Thu	83	83	83	83	82	82	82	82	83	83	84	84	84	85	89	93	101	107	109	107	102	97	94	91
Fri	88	88	88	88	89	89	89	89	89	88	88	87	87	87	90	94	101	108	113	115	112	106	99	92
Sat	88	84	84	85	86	87	89	90	91	92	92	93	93	98	99	112	126	132	135	134	132	129	125	119
Sun	110	106	102	98	98	99	99	98	97	97	97	97	97	101	101	109	123	129	129	125	121	115	108	101
Mon	94	91	91	90	90	89	89	88	87	87	86	86	86	86	91	100	112	121	124	122	119	115	108	101
Tue	95	89	85	85	85	84	84	84	84	85	85	85	90	92	94	100	107	113	115	115	113	111	110	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	99	95	90	85	85	84	84	83	83	82	82	82	82	82	83	85	94	100	102	101	99	93	85	83
Thu	83	83	83	83	82	82	82	82	83	83	84	84	84	85	89	93	101	107	109	107	102	97	94	91
Fri	88	88	88	88	89	89	89	89	89	88	88	87	87	87	90	94	101	108	113	115	112	106	99	92
Sat	88	84	84	85	86	87	89	90	91	92	92	93	93	98	99	112	126	132	135	134	132	129	125	119
Sun	110	106	102	98	98	99	99	98	97	97	97	97	97	101	101	109	123	129	129	125	121	115	108	101
Mon	94	91	91	90	90	89	89	88	87	87	86	86	86	86	91	100	112	121	124	122	119	115	108	101
Tue	95	89	85	85	85	84	84	84	84	85	85	85	90	92	94	100	107	113	115	115	113	111	110	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	99	95	90	85	85	84	84	83	83	82	82	82	82	82	83	85	94	100	102	101	99	93	85	83
Thu	83	83	83	83	82	82	82	82	83	83	84	84	84	85	89	93	101	107	109	107	102	97	94	91
Fri	88	88	88	88	89	89	89	89	89	88	88	87	87	87	90	94	101	108	113	115	112	106	99	92
Sat	88	84	84	85	86	87	89	90	91	92	92	93	93	98	99	112	126	132	135	134	132	129	125	119
Sun	110	106	102	98	98	99	99	98	97	97	97	97	97	101	101	109	123	129	129	125	121	115	108	101
Mon	94	91	91	90	90	89	89	88	87	87	86	86	86	86	91	100	112	121	124	122	119	115	108	101
Tue	95	89	85	85	85	84	84	84	84	85	85	85	90	92	94	100	107	113	115	115	113	111	110	108