18 – 24 Sep 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

64.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.4 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-5.8 AQI compared with the previous week’s mean of 70.7.

Highest hourly estimate: 215 in Da Nang · 20 Sept, 18:00 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, 18 Sep	58.7Moderate	24–100	15.7	192 / 192
Thu, 19 Sep	59.9Moderate	21–102	15.1	192 / 192
Fri, 20 Sep	70Moderate	18–215	17.3	192 / 192
Sat, 21 Sep	60.5Moderate	18–127	14.9	192 / 192
Sun, 22 Sep	59.5Moderate	16–132	12.7	192 / 192
Mon, 23 Sep	63.4Moderate	21–162	19.7	192 / 192
Tue, 24 Sep	81.9Moderate	42–163	26.2	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	56	56	56	57	57	57	57	57	57	58	58	58	59	59	59	60	61	62	63	62	61	61	61	61
Thu	60	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	60	63	64	64	63	61	60	59
Fri	59	59	59	59	60	60	60	60	61	61	62	62	68	69	74	79	85	88	90	90	87	83	77	71
Sat	65	63	62	61	61	60	60	60	59	59	59	59	59	59	59	59	61	64	65	63	61	58	59	58
Sun	59	58	59	59	59	59	58	58	57	57	57	57	56	56	59	61	63	65	65	65	64	62	59	57
Mon	55	55	55	55	56	56	56	57	57	58	59	59	60	60	61	66	70	73	74	75	76	77	77	76
Tue	76	76	76	75	76	77	79	80	81	83	83	83	84	84	84	84	85	85	87	87	87	86	85	85

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	96.8Moderate	163	32.6	168 / 168
Hanoi	94.9Moderate	138	33	168 / 168
Da Nang	76.2Moderate	215	14.3	168 / 168
Ho Chi Minh City	64.8Moderate	100	18.7	168 / 168
Hue	57.2Moderate	67	13.7	168 / 168
Nha Trang	51.7Moderate	71	10.5	168 / 168
Can Tho	48.3Good	75	11.2	168 / 168
Da Lat	29Good	53	4.9	168 / 168

City-hours by category

Good: 329

Moderate: 894

Unhealthy for Sensitive Groups: 102

Unhealthy: 14

Very Unhealthy: 5

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	56	56	56	57	57	57	57	57	57	58	58	58	59	59	59	60	61	62	63	62	61	61	61	61
Thu	60	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	60	63	64	64	63	61	60	59
Fri	59	59	59	59	60	60	60	60	61	61	62	62	68	69	74	79	85	88	90	90	87	83	77	71
Sat	65	63	62	61	61	60	60	60	59	59	59	59	59	59	59	59	61	64	65	63	61	58	59	58
Sun	59	58	59	59	59	59	58	58	57	57	57	57	56	56	59	61	63	65	65	65	64	62	59	57
Mon	55	55	55	55	56	56	56	57	57	58	59	59	60	60	61	66	70	73	74	75	76	77	77	76
Tue	76	76	76	75	76	77	79	80	81	83	83	83	84	84	84	84	85	85	87	87	87	86	85	85

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	56	56	56	57	57	57	57	57	57	58	58	58	59	59	59	60	61	62	63	62	61	61	61	61
Thu	60	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	60	63	64	64	63	61	60	59
Fri	59	59	59	59	60	60	60	60	61	61	62	62	68	69	74	79	85	88	90	90	87	83	77	71
Sat	65	63	62	61	61	60	60	60	59	59	59	59	59	59	59	59	61	64	65	63	61	58	59	58
Sun	59	58	59	59	59	59	58	58	57	57	57	57	56	56	59	61	63	65	65	65	64	62	59	57
Mon	55	55	55	55	56	56	56	57	57	58	59	59	60	60	61	66	70	73	74	75	76	77	77	76
Tue	76	76	76	75	76	77	79	80	81	83	83	83	84	84	84	84	85	85	87	87	87	86	85	85

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	56	56	56	57	57	57	57	57	57	58	58	58	59	59	59	60	61	62	63	62	61	61	61	61
Thu	60	60	60	60	59	59	59	59	59	59	59	59	59	59	59	59	60	63	64	64	63	61	60	59
Fri	59	59	59	59	60	60	60	60	61	61	62	62	68	69	74	79	85	88	90	90	87	83	77	71
Sat	65	63	62	61	61	60	60	60	59	59	59	59	59	59	59	59	61	64	65	63	61	58	59	58
Sun	59	58	59	59	59	59	58	58	57	57	57	57	56	56	59	61	63	65	65	65	64	62	59	57
Mon	55	55	55	55	56	56	56	57	57	58	59	59	60	60	61	66	70	73	74	75	76	77	77	76
Tue	76	76	76	75	76	77	79	80	81	83	83	83	84	84	84	84	85	85	87	87	87	86	85	85