28 Jun – 4 Jul 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

76.6Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-5.6 AQI compared with the previous week’s mean of 82.2.

Highest hourly estimate: 245 in Da Nang · 4 Jul, 20:00 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, 28 Jun	79.9Moderate	55–147	18.2	192 / 192
Thu, 29 Jun	76.7Moderate	52–211	16.6	192 / 192
Fri, 30 Jun	77.5Moderate	51–227	17.6	192 / 192
Sat, 1 Jul	75.4Moderate	32–211	15.5	192 / 192
Sun, 2 Jul	68.1Moderate	32–198	16.9	192 / 192
Mon, 3 Jul	76.3Moderate	33–204	19.3	192 / 192
Tue, 4 Jul	82.2Moderate	32–245	21.3	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	78	78	77	77	77	76	76	76	76	76	75	75	75	77	79	86	91	95	97	93	87	80	74	68
Thu	68	67	66	66	65	65	64	64	64	63	63	66	69	73	77	83	92	100	105	105	101	94	85	77
Fri	72	70	67	65	65	65	65	65	66	66	66	66	69	71	77	86	93	100	104	103	98	93	88	83
Sat	77	73	68	65	65	65	64	64	64	63	63	63	63	68	70	83	91	98	101	99	96	90	83	76
Sun	67	63	61	61	61	61	61	61	61	61	62	62	62	62	63	71	77	82	85	84	82	80	76	71
Mon	69	67	65	64	64	64	64	64	64	64	65	65	66	66	69	79	90	98	103	104	102	99	93	85
Tue	80	76	73	70	70	70	71	71	71	71	71	71	75	77	81	91	98	103	105	103	100	95	91	89

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
Da Nang	119.4Unhealthy for Sensitive Groups	245	22.9	168 / 168
Hanoi	108.9Unhealthy for Sensitive Groups	206	28.7	168 / 168
Ho Chi Minh City	81.3Moderate	126	24.2	168 / 168
Hue	69.3Moderate	147	17.1	168 / 168
Hai Phong	67.5Moderate	98	15.6	168 / 168
Nha Trang	66.1Moderate	127	14	168 / 168
Can Tho	56.3Moderate	77	12.7	168 / 168
Da Lat	43.8Good	58	8.2	168 / 168

City-hours by category

Good: 96

Moderate: 1073

Unhealthy for Sensitive Groups: 92

Unhealthy: 51

Very Unhealthy: 32

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	78	78	77	77	77	76	76	76	76	76	75	75	75	77	79	86	91	95	97	93	87	80	74	68
Thu	68	67	66	66	65	65	64	64	64	63	63	66	69	73	77	83	92	100	105	105	101	94	85	77
Fri	72	70	67	65	65	65	65	65	66	66	66	66	69	71	77	86	93	100	104	103	98	93	88	83
Sat	77	73	68	65	65	65	64	64	64	63	63	63	63	68	70	83	91	98	101	99	96	90	83	76
Sun	67	63	61	61	61	61	61	61	61	61	62	62	62	62	63	71	77	82	85	84	82	80	76	71
Mon	69	67	65	64	64	64	64	64	64	64	65	65	66	66	69	79	90	98	103	104	102	99	93	85
Tue	80	76	73	70	70	70	71	71	71	71	71	71	75	77	81	91	98	103	105	103	100	95	91	89

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	78	78	77	77	77	76	76	76	76	76	75	75	75	77	79	86	91	95	97	93	87	80	74	68
Thu	68	67	66	66	65	65	64	64	64	63	63	66	69	73	77	83	92	100	105	105	101	94	85	77
Fri	72	70	67	65	65	65	65	65	66	66	66	66	69	71	77	86	93	100	104	103	98	93	88	83
Sat	77	73	68	65	65	65	64	64	64	63	63	63	63	68	70	83	91	98	101	99	96	90	83	76
Sun	67	63	61	61	61	61	61	61	61	61	62	62	62	62	63	71	77	82	85	84	82	80	76	71
Mon	69	67	65	64	64	64	64	64	64	64	65	65	66	66	69	79	90	98	103	104	102	99	93	85
Tue	80	76	73	70	70	70	71	71	71	71	71	71	75	77	81	91	98	103	105	103	100	95	91	89

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	78	78	77	77	77	76	76	76	76	76	75	75	75	77	79	86	91	95	97	93	87	80	74	68
Thu	68	67	66	66	65	65	64	64	64	63	63	66	69	73	77	83	92	100	105	105	101	94	85	77
Fri	72	70	67	65	65	65	65	65	66	66	66	66	69	71	77	86	93	100	104	103	98	93	88	83
Sat	77	73	68	65	65	65	64	64	64	63	63	63	63	68	70	83	91	98	101	99	96	90	83	76
Sun	67	63	61	61	61	61	61	61	61	61	62	62	62	62	63	71	77	82	85	84	82	80	76	71
Mon	69	67	65	64	64	64	64	64	64	64	65	65	66	66	69	79	90	98	103	104	102	99	93	85
Tue	80	76	73	70	70	70	71	71	71	71	71	71	75	77	81	91	98	103	105	103	100	95	91	89