11 – 17 Sep 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

70.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 19.1 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+2.9 AQI compared with the previous week’s mean of 67.8.

Highest hourly estimate: 201 in Da Nang · 12 Sept, 17:00 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, 11 Sep	69.4Moderate	41–177	16.3	192 / 192
Thu, 12 Sep	72.2Moderate	38–201	18.7	192 / 192
Fri, 13 Sep	73.9Moderate	40–159	20.3	192 / 192
Sat, 14 Sep	75.4Moderate	23–161	25	192 / 192
Sun, 15 Sep	77.7Moderate	22–170	24	192 / 192
Mon, 16 Sep	68.3Moderate	21–168	16	192 / 192
Tue, 17 Sep	58.1Moderate	26–111	13.7	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	68	68	68	68	68	68	68	67	67	66	66	66	66	66	68	71	73	74	75	76	75	74	72	70
Thu	67	64	63	64	64	64	64	64	64	64	64	64	65	69	74	78	84	88	92	92	87	83	78	75
Fri	73	71	70	70	69	70	70	71	71	71	71	71	73	75	77	79	82	84	84	81	76	71	71	72
Sat	72	72	72	73	73	73	74	75	75	75	76	76	76	76	76	78	78	78	78	77	77	77	77	77
Sun	77	77	77	77	78	78	78	78	78	78	78	78	78	78	78	78	78	79	80	78	78	78	77	76
Mon	76	75	74	72	71	70	69	68	66	65	64	64	63	63	63	66	70	74	75	74	69	67	64	61
Tue	59	59	58	58	58	58	58	58	58	58	58	58	58	58	58	58	58	59	61	60	58	57	56	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	116.8Unhealthy for Sensitive Groups	170	43.6	168 / 168
Hai Phong	107.2Unhealthy for Sensitive Groups	168	36.9	168 / 168
Da Nang	75.6Moderate	201	14.2	168 / 168
Ho Chi Minh City	69.3Moderate	95	18.5	168 / 168
Hue	62.9Moderate	81	14.7	168 / 168
Nha Trang	58.3Moderate	75	12.1	168 / 168
Can Tho	40.1Good	52	7.3	168 / 168
Da Lat	35.4Good	52	6	168 / 168

City-hours by category

Good: 351

Moderate: 773

Unhealthy for Sensitive Groups: 122

Unhealthy: 96

Very Unhealthy: 2

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	68	68	68	68	68	68	68	67	67	66	66	66	66	66	68	71	73	74	75	76	75	74	72	70
Thu	67	64	63	64	64	64	64	64	64	64	64	64	65	69	74	78	84	88	92	92	87	83	78	75
Fri	73	71	70	70	69	70	70	71	71	71	71	71	73	75	77	79	82	84	84	81	76	71	71	72
Sat	72	72	72	73	73	73	74	75	75	75	76	76	76	76	76	78	78	78	78	77	77	77	77	77
Sun	77	77	77	77	78	78	78	78	78	78	78	78	78	78	78	78	78	79	80	78	78	78	77	76
Mon	76	75	74	72	71	70	69	68	66	65	64	64	63	63	63	66	70	74	75	74	69	67	64	61
Tue	59	59	58	58	58	58	58	58	58	58	58	58	58	58	58	58	58	59	61	60	58	57	56	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	68	68	68	68	68	68	68	67	67	66	66	66	66	66	68	71	73	74	75	76	75	74	72	70
Thu	67	64	63	64	64	64	64	64	64	64	64	64	65	69	74	78	84	88	92	92	87	83	78	75
Fri	73	71	70	70	69	70	70	71	71	71	71	71	73	75	77	79	82	84	84	81	76	71	71	72
Sat	72	72	72	73	73	73	74	75	75	75	76	76	76	76	76	78	78	78	78	77	77	77	77	77
Sun	77	77	77	77	78	78	78	78	78	78	78	78	78	78	78	78	78	79	80	78	78	78	77	76
Mon	76	75	74	72	71	70	69	68	66	65	64	64	63	63	63	66	70	74	75	74	69	67	64	61
Tue	59	59	58	58	58	58	58	58	58	58	58	58	58	58	58	58	58	59	61	60	58	57	56	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	68	68	68	68	68	68	68	67	67	66	66	66	66	66	68	71	73	74	75	76	75	74	72	70
Thu	67	64	63	64	64	64	64	64	64	64	64	64	65	69	74	78	84	88	92	92	87	83	78	75
Fri	73	71	70	70	69	70	70	71	71	71	71	71	73	75	77	79	82	84	84	81	76	71	71	72
Sat	72	72	72	73	73	73	74	75	75	75	76	76	76	76	76	78	78	78	78	77	77	77	77	77
Sun	77	77	77	77	78	78	78	78	78	78	78	78	78	78	78	78	78	79	80	78	78	78	77	76
Mon	76	75	74	72	71	70	69	68	66	65	64	64	63	63	63	66	70	74	75	74	69	67	64	61
Tue	59	59	58	58	58	58	58	58	58	58	58	58	58	58	58	58	58	59	61	60	58	57	56	56