9 – 15 Jul 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

101.3Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 30.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+9.6 AQI compared with the previous week’s mean of 91.7.

Highest hourly estimate: 235 in Da Nang · 9 Jul, 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, 9 Jul	100Moderate	40–235	28.3	192 / 192
Thu, 10 Jul	91.7Moderate	37–227	27.5	192 / 192
Fri, 11 Jul	91.4Moderate	40–217	25.8	192 / 192
Sat, 12 Jul	95.9Moderate	40–211	27.8	192 / 192
Sun, 13 Jul	108.1Unhealthy for Sensitive Groups	53–230	33.9	192 / 192
Mon, 14 Jul	115Unhealthy for Sensitive Groups	42–234	37.8	192 / 192
Tue, 15 Jul	107Unhealthy for Sensitive Groups	47–218	33.1	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	90	90	91	91	91	92	91	90	90	90	95	97	100	108	116	121	123	122	116	112	106	100
Thu	92	87	86	86	85	84	83	82	82	81	81	81	81	82	86	92	96	104	111	114	114	111	105	99
Fri	95	88	85	85	85	85	84	84	84	84	84	84	84	86	89	94	98	104	107	107	104	101	99	98
Sat	97	96	94	93	91	89	87	85	84	84	84	88	90	94	98	102	108	113	114	111	108	104	98	95
Sun	93	92	91	92	91	92	92	93	94	94	95	99	102	107	111	118	128	137	140	140	135	128	119	115
Mon	111	109	108	106	103	102	104	104	105	105	105	104	108	111	115	120	127	133	136	136	134	130	125	120
Tue	115	110	104	99	98	97	96	94	94	94	94	94	98	100	104	110	118	127	130	130	126	121	112	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
Hai Phong	158.1Unhealthy	184	66	168 / 168
Hanoi	142.3Unhealthy for Sensitive Groups	215	56.8	168 / 168
Da Nang	138.2Unhealthy for Sensitive Groups	235	20.2	168 / 168
Ho Chi Minh City	102.9Unhealthy for Sensitive Groups	143	36.2	168 / 168
Nha Trang	77Moderate	143	17.5	168 / 168
Can Tho	72.3Moderate	85	20.8	168 / 168
Hue	69.9Moderate	152	17.2	168 / 168
Da Lat	49.8Good	62	10.1	168 / 168

City-hours by category

Good: 115

Moderate: 699

Unhealthy for Sensitive Groups: 212

Unhealthy: 265

Very Unhealthy: 53

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	90	90	91	91	91	92	91	90	90	90	95	97	100	108	116	121	123	122	116	112	106	100
Thu	92	87	86	86	85	84	83	82	82	81	81	81	81	82	86	92	96	104	111	114	114	111	105	99
Fri	95	88	85	85	85	85	84	84	84	84	84	84	84	86	89	94	98	104	107	107	104	101	99	98
Sat	97	96	94	93	91	89	87	85	84	84	84	88	90	94	98	102	108	113	114	111	108	104	98	95
Sun	93	92	91	92	91	92	92	93	94	94	95	99	102	107	111	118	128	137	140	140	135	128	119	115
Mon	111	109	108	106	103	102	104	104	105	105	105	104	108	111	115	120	127	133	136	136	134	130	125	120
Tue	115	110	104	99	98	97	96	94	94	94	94	94	98	100	104	110	118	127	130	130	126	121	112	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	89	90	90	90	91	91	91	92	91	90	90	90	95	97	100	108	116	121	123	122	116	112	106	100
Thu	92	87	86	86	85	84	83	82	82	81	81	81	81	82	86	92	96	104	111	114	114	111	105	99
Fri	95	88	85	85	85	85	84	84	84	84	84	84	84	86	89	94	98	104	107	107	104	101	99	98
Sat	97	96	94	93	91	89	87	85	84	84	84	88	90	94	98	102	108	113	114	111	108	104	98	95
Sun	93	92	91	92	91	92	92	93	94	94	95	99	102	107	111	118	128	137	140	140	135	128	119	115
Mon	111	109	108	106	103	102	104	104	105	105	105	104	108	111	115	120	127	133	136	136	134	130	125	120
Tue	115	110	104	99	98	97	96	94	94	94	94	94	98	100	104	110	118	127	130	130	126	121	112	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	89	90	90	90	91	91	91	92	91	90	90	90	95	97	100	108	116	121	123	122	116	112	106	100
Thu	92	87	86	86	85	84	83	82	82	81	81	81	81	82	86	92	96	104	111	114	114	111	105	99
Fri	95	88	85	85	85	85	84	84	84	84	84	84	84	86	89	94	98	104	107	107	104	101	99	98
Sat	97	96	94	93	91	89	87	85	84	84	84	88	90	94	98	102	108	113	114	111	108	104	98	95
Sun	93	92	91	92	91	92	92	93	94	94	95	99	102	107	111	118	128	137	140	140	135	128	119	115
Mon	111	109	108	106	103	102	104	104	105	105	105	104	108	111	115	120	127	133	136	136	134	130	125	120
Tue	115	110	104	99	98	97	96	94	94	94	94	94	98	100	104	110	118	127	130	130	126	121	112	108