16 – 22 Jul 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 23.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-17.8 AQI compared with the previous week’s mean of 101.3.

Highest hourly estimate: 236 in Da Nang · 16 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, 16 Jul	101.4Unhealthy for Sensitive Groups	55–236	27.7	192 / 192
Thu, 17 Jul	100.3Unhealthy for Sensitive Groups	39–219	30.2	192 / 192
Fri, 18 Jul	95.2Moderate	37–206	30.4	192 / 192
Sat, 19 Jul	89.1Moderate	25–178	27.7	192 / 192
Sun, 20 Jul	77.4Moderate	26–159	21.2	192 / 192
Mon, 21 Jul	66.1Moderate	23–145	15.2	192 / 192
Tue, 22 Jul	55.3Moderate	20–116	12.1	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	105	100	96	93	93	93	92	92	92	92	92	92	98	99	102	107	111	115	118	119	115	110	105	103
Thu	102	100	98	95	94	93	91	89	89	89	89	89	89	93	96	100	109	118	123	122	120	115	107	100
Fri	98	95	92	89	86	84	84	84	84	84	84	85	85	90	93	98	105	112	116	116	114	108	104	98
Sat	94	90	88	88	87	87	87	87	87	87	86	86	86	85	85	85	88	95	99	100	97	93	89	85
Sun	84	83	82	82	81	81	80	79	78	78	77	76	76	76	76	76	75	75	75	75	74	73	73	72
Mon	71	70	69	69	68	67	67	67	65	64	64	64	64	64	65	67	69	70	69	67	65	62	60	59
Tue	58	57	56	56	55	54	54	53	52	52	52	51	51	51	52	53	56	59	61	61	61	59	58	56

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	142.9Unhealthy for Sensitive Groups	219	54.6	168 / 168
Hai Phong	121.8Unhealthy for Sensitive Groups	185	38.7	168 / 168
Ho Chi Minh City	93.6Moderate	124	30.5	168 / 168
Da Nang	93Moderate	236	13.5	168 / 168
Can Tho	70.7Moderate	85	19.3	168 / 168
Nha Trang	61.7Moderate	106	14.3	168 / 168
Hue	48.4Good	84	10.6	168 / 168
Da Lat	36.3Good	59	6.4	168 / 168

City-hours by category

Good: 235

Moderate: 719

Unhealthy for Sensitive Groups: 224

Unhealthy: 142

Very Unhealthy: 24

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	105	100	96	93	93	93	92	92	92	92	92	92	98	99	102	107	111	115	118	119	115	110	105	103
Thu	102	100	98	95	94	93	91	89	89	89	89	89	89	93	96	100	109	118	123	122	120	115	107	100
Fri	98	95	92	89	86	84	84	84	84	84	84	85	85	90	93	98	105	112	116	116	114	108	104	98
Sat	94	90	88	88	87	87	87	87	87	87	86	86	86	85	85	85	88	95	99	100	97	93	89	85
Sun	84	83	82	82	81	81	80	79	78	78	77	76	76	76	76	76	75	75	75	75	74	73	73	72
Mon	71	70	69	69	68	67	67	67	65	64	64	64	64	64	65	67	69	70	69	67	65	62	60	59
Tue	58	57	56	56	55	54	54	53	52	52	52	51	51	51	52	53	56	59	61	61	61	59	58	56

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	105	100	96	93	93	93	92	92	92	92	92	92	98	99	102	107	111	115	118	119	115	110	105	103
Thu	102	100	98	95	94	93	91	89	89	89	89	89	89	93	96	100	109	118	123	122	120	115	107	100
Fri	98	95	92	89	86	84	84	84	84	84	84	85	85	90	93	98	105	112	116	116	114	108	104	98
Sat	94	90	88	88	87	87	87	87	87	87	86	86	86	85	85	85	88	95	99	100	97	93	89	85
Sun	84	83	82	82	81	81	80	79	78	78	77	76	76	76	76	76	75	75	75	75	74	73	73	72
Mon	71	70	69	69	68	67	67	67	65	64	64	64	64	64	65	67	69	70	69	67	65	62	60	59
Tue	58	57	56	56	55	54	54	53	52	52	52	51	51	51	52	53	56	59	61	61	61	59	58	56

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	105	100	96	93	93	93	92	92	92	92	92	92	98	99	102	107	111	115	118	119	115	110	105	103
Thu	102	100	98	95	94	93	91	89	89	89	89	89	89	93	96	100	109	118	123	122	120	115	107	100
Fri	98	95	92	89	86	84	84	84	84	84	84	85	85	90	93	98	105	112	116	116	114	108	104	98
Sat	94	90	88	88	87	87	87	87	87	87	86	86	86	85	85	85	88	95	99	100	97	93	89	85
Sun	84	83	82	82	81	81	80	79	78	78	77	76	76	76	76	76	75	75	75	75	74	73	73	72
Mon	71	70	69	69	68	67	67	67	65	64	64	64	64	64	65	67	69	70	69	67	65	62	60	59
Tue	58	57	56	56	55	54	54	53	52	52	52	51	51	51	52	53	56	59	61	61	61	59	58	56