21 – 27 Aug 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83Weekly mean modelled AQI · Moderate

Mean PM2.5: 22.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-17.6 AQI compared with the previous week’s mean of 100.6.

Highest hourly estimate: 212 in Da Nang · 26 Aug, 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, 21 Aug	89.9Moderate	55–205	23.2	192 / 192
Thu, 22 Aug	83.7Moderate	56–191	21	192 / 192
Fri, 23 Aug	79.3Moderate	57–200	24	192 / 192
Sat, 24 Aug	87.1Moderate	57–188	25.3	192 / 192
Sun, 25 Aug	83.7Moderate	52–180	22.7	192 / 192
Mon, 26 Aug	81.6Moderate	32–212	19.8	192 / 192
Tue, 27 Aug	76Moderate	27–209	20	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	90	86	85	84	83	82	82	81	80	79	79	78	78	82	83	92	100	108	113	113	109	102	95	89
Thu	86	83	81	79	79	79	79	79	79	79	79	79	78	79	84	87	91	95	98	97	93	88	82	76
Fri	73	73	73	73	73	73	73	73	73	73	73	73	74	75	80	84	87	91	93	93	91	88	87	85
Sat	84	82	80	80	80	80	81	81	82	81	81	82	82	82	87	92	97	102	105	104	101	95	87	83
Sun	82	82	82	81	81	81	81	80	80	80	80	80	80	83	86	88	89	93	96	95	90	83	79	77
Mon	77	76	76	76	76	76	75	75	75	75	74	76	77	80	84	87	89	96	100	100	96	89	81	73
Tue	70	69	69	69	68	68	68	68	67	67	67	67	69	73	76	79	86	94	98	97	94	89	80	74

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	130Unhealthy for Sensitive Groups	209	45.7	168 / 168
Da Nang	118.6Unhealthy for Sensitive Groups	212	25.7	168 / 168
Ho Chi Minh City	84.7Moderate	114	26.6	168 / 168
Hai Phong	80.6Moderate	165	22.5	168 / 168
Hue	75.4Moderate	134	19	168 / 168
Nha Trang	64.9Moderate	104	15.1	168 / 168
Can Tho	57Moderate	66	12.6	168 / 168
Da Lat	53Moderate	64	11.3	168 / 168

City-hours by category

Good: 62

Moderate: 983

Unhealthy for Sensitive Groups: 229

Unhealthy: 59

Very Unhealthy: 11

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	90	86	85	84	83	82	82	81	80	79	79	78	78	82	83	92	100	108	113	113	109	102	95	89
Thu	86	83	81	79	79	79	79	79	79	79	79	79	78	79	84	87	91	95	98	97	93	88	82	76
Fri	73	73	73	73	73	73	73	73	73	73	73	73	74	75	80	84	87	91	93	93	91	88	87	85
Sat	84	82	80	80	80	80	81	81	82	81	81	82	82	82	87	92	97	102	105	104	101	95	87	83
Sun	82	82	82	81	81	81	81	80	80	80	80	80	80	83	86	88	89	93	96	95	90	83	79	77
Mon	77	76	76	76	76	76	75	75	75	75	74	76	77	80	84	87	89	96	100	100	96	89	81	73
Tue	70	69	69	69	68	68	68	68	67	67	67	67	69	73	76	79	86	94	98	97	94	89	80	74

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	90	86	85	84	83	82	82	81	80	79	79	78	78	82	83	92	100	108	113	113	109	102	95	89
Thu	86	83	81	79	79	79	79	79	79	79	79	79	78	79	84	87	91	95	98	97	93	88	82	76
Fri	73	73	73	73	73	73	73	73	73	73	73	73	74	75	80	84	87	91	93	93	91	88	87	85
Sat	84	82	80	80	80	80	81	81	82	81	81	82	82	82	87	92	97	102	105	104	101	95	87	83
Sun	82	82	82	81	81	81	81	80	80	80	80	80	80	83	86	88	89	93	96	95	90	83	79	77
Mon	77	76	76	76	76	76	75	75	75	75	74	76	77	80	84	87	89	96	100	100	96	89	81	73
Tue	70	69	69	69	68	68	68	68	67	67	67	67	69	73	76	79	86	94	98	97	94	89	80	74

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	90	86	85	84	83	82	82	81	80	79	79	78	78	82	83	92	100	108	113	113	109	102	95	89
Thu	86	83	81	79	79	79	79	79	79	79	79	79	78	79	84	87	91	95	98	97	93	88	82	76
Fri	73	73	73	73	73	73	73	73	73	73	73	73	74	75	80	84	87	91	93	93	91	88	87	85
Sat	84	82	80	80	80	80	81	81	82	81	81	82	82	82	87	92	97	102	105	104	101	95	87	83
Sun	82	82	82	81	81	81	81	80	80	80	80	80	80	83	86	88	89	93	96	95	90	83	79	77
Mon	77	76	76	76	76	76	75	75	75	75	74	76	77	80	84	87	89	96	100	100	96	89	81	73
Tue	70	69	69	69	68	68	68	68	67	67	67	67	69	73	76	79	86	94	98	97	94	89	80	74