23 – 29 Aug 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: 18.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-6.3 AQI compared with the previous week’s mean of 82.9.

Highest hourly estimate: 225 in Da Nang · 26 Aug, 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, 23 Aug	83.1Moderate	36–221	20.1	192 / 192
Thu, 24 Aug	75.2Moderate	32–200	17.8	192 / 192
Fri, 25 Aug	77.5Moderate	34–221	19.7	192 / 192
Sat, 26 Aug	86Moderate	40–225	22.5	192 / 192
Sun, 27 Aug	81.3Moderate	37–207	18.2	192 / 192
Mon, 28 Aug	69.5Moderate	34–196	16	192 / 192
Tue, 29 Aug	63.8Moderate	34–118	15.4	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	82	82	81	80	78	76	73	73	72	72	71	71	70	74	76	82	90	98	105	106	105	100	93	86
Thu	83	81	79	77	73	70	68	68	68	68	68	68	68	68	71	75	79	82	85	86	84	81	79	77
Fri	75	73	72	71	69	68	67	66	67	67	67	67	70	72	76	81	87	94	99	99	96	90	86	85
Sat	85	84	82	82	80	78	77	75	74	74	75	76	78	82	85	89	93	101	107	107	103	96	92	91
Sun	90	89	87	84	81	77	72	72	71	71	70	70	70	69	69	73	85	94	100	101	98	92	87	82
Mon	77	74	70	66	66	65	65	65	65	64	64	64	63	63	64	69	73	76	80	80	79	76	72	69
Tue	66	64	62	61	61	62	62	61	62	62	62	62	63	63	63	66	70	72	72	69	66	62	61	60

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	133.3Unhealthy for Sensitive Groups	225	25.2	168 / 168
Hanoi	124.5Unhealthy for Sensitive Groups	202	40.5	168 / 168
Hai Phong	78.6Moderate	151	20.7	168 / 168
Ho Chi Minh City	69.7Moderate	85	18.8	168 / 168
Hue	65.9Moderate	126	15.9	168 / 168
Nha Trang	58.7Moderate	94	12.5	168 / 168
Can Tho	42.6Good	54	7.5	168 / 168
Da Lat	39.9Good	47	7	168 / 168

City-hours by category

Good: 317

Moderate: 772

Unhealthy for Sensitive Groups: 161

Unhealthy: 68

Very Unhealthy: 26

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	82	82	81	80	78	76	73	73	72	72	71	71	70	74	76	82	90	98	105	106	105	100	93	86
Thu	83	81	79	77	73	70	68	68	68	68	68	68	68	68	71	75	79	82	85	86	84	81	79	77
Fri	75	73	72	71	69	68	67	66	67	67	67	67	70	72	76	81	87	94	99	99	96	90	86	85
Sat	85	84	82	82	80	78	77	75	74	74	75	76	78	82	85	89	93	101	107	107	103	96	92	91
Sun	90	89	87	84	81	77	72	72	71	71	70	70	70	69	69	73	85	94	100	101	98	92	87	82
Mon	77	74	70	66	66	65	65	65	65	64	64	64	63	63	64	69	73	76	80	80	79	76	72	69
Tue	66	64	62	61	61	62	62	61	62	62	62	62	63	63	63	66	70	72	72	69	66	62	61	60

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	82	82	81	80	78	76	73	73	72	72	71	71	70	74	76	82	90	98	105	106	105	100	93	86
Thu	83	81	79	77	73	70	68	68	68	68	68	68	68	68	71	75	79	82	85	86	84	81	79	77
Fri	75	73	72	71	69	68	67	66	67	67	67	67	70	72	76	81	87	94	99	99	96	90	86	85
Sat	85	84	82	82	80	78	77	75	74	74	75	76	78	82	85	89	93	101	107	107	103	96	92	91
Sun	90	89	87	84	81	77	72	72	71	71	70	70	70	69	69	73	85	94	100	101	98	92	87	82
Mon	77	74	70	66	66	65	65	65	65	64	64	64	63	63	64	69	73	76	80	80	79	76	72	69
Tue	66	64	62	61	61	62	62	61	62	62	62	62	63	63	63	66	70	72	72	69	66	62	61	60

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	82	82	81	80	78	76	73	73	72	72	71	71	70	74	76	82	90	98	105	106	105	100	93	86
Thu	83	81	79	77	73	70	68	68	68	68	68	68	68	68	71	75	79	82	85	86	84	81	79	77
Fri	75	73	72	71	69	68	67	66	67	67	67	67	70	72	76	81	87	94	99	99	96	90	86	85
Sat	85	84	82	82	80	78	77	75	74	74	75	76	78	82	85	89	93	101	107	107	103	96	92	91
Sun	90	89	87	84	81	77	72	72	71	71	70	70	70	69	69	73	85	94	100	101	98	92	87	82
Mon	77	74	70	66	66	65	65	65	65	64	64	64	63	63	64	69	73	76	80	80	79	76	72	69
Tue	66	64	62	61	61	62	62	61	62	62	62	62	63	63	63	66	70	72	72	69	66	62	61	60