12 – 18 Oct 2022 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

81.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 25 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+19.4 AQI compared with the previous week’s mean of 62.5.

Highest hourly estimate: 158 in Hanoi · 13 Oct, 15:00 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, 12 Oct	72.6Moderate	25–133	22.2	192 / 192
Thu, 13 Oct	85.8Moderate	33–158	28.6	192 / 192
Fri, 14 Oct	85.4Moderate	40–154	23.1	192 / 192
Sat, 15 Oct	73Moderate	31–135	20.9	192 / 192
Sun, 16 Oct	80.3Moderate	38–138	25.2	192 / 192
Mon, 17 Oct	88.7Moderate	43–156	27.2	192 / 192
Tue, 18 Oct	87.5Moderate	41–126	27.9	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	69	70	71	71	71	72	72	72	72	72	73	73	73	73	74	74	74	75	74	74	74	75	76
Thu	77	77	79	80	81	82	83	84	85	86	87	87	88	88	88	88	88	89	89	89	90	92	92	93
Fri	94	95	95	95	94	92	91	89	87	85	84	82	81	80	80	80	80	80	80	81	81	82	82	81
Sat	80	79	76	75	74	74	73	73	72	72	72	72	72	72	72	72	72	72	72	72	71	71	71	72
Sun	72	72	73	73	73	74	74	75	75	76	76	77	77	78	79	82	84	87	90	90	91	92	94	95
Mon	95	95	95	95	94	93	91	89	88	87	86	86	85	84	83	84	86	87	87	87	88	88	88	88
Tue	87	87	87	88	88	88	88	88	88	87	87	87	87	87	87	88	88	88	88	88	88	87	87	87

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	113.4Unhealthy for Sensitive Groups	158	41.9	168 / 168
Hai Phong	112.1Unhealthy for Sensitive Groups	151	41.2	168 / 168
Da Nang	91.6Moderate	156	24.3	168 / 168
Hue	82.4Moderate	128	24.5	168 / 168
Ho Chi Minh City	81.8Moderate	98	25.5	168 / 168
Can Tho	71Moderate	85	19.8	168 / 168
Nha Trang	60.1Moderate	99	15	168 / 168
Da Lat	42.7Good	53	7.8	168 / 168

City-hours by category

Good: 172

Moderate: 874

Unhealthy for Sensitive Groups: 266

Unhealthy: 32

Very Unhealthy: 0

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	69	70	71	71	71	72	72	72	72	72	73	73	73	73	74	74	74	75	74	74	74	75	76
Thu	77	77	79	80	81	82	83	84	85	86	87	87	88	88	88	88	88	89	89	89	90	92	92	93
Fri	94	95	95	95	94	92	91	89	87	85	84	82	81	80	80	80	80	80	80	81	81	82	82	81
Sat	80	79	76	75	74	74	73	73	72	72	72	72	72	72	72	72	72	72	72	72	71	71	71	72
Sun	72	72	73	73	73	74	74	75	75	76	76	77	77	78	79	82	84	87	90	90	91	92	94	95
Mon	95	95	95	95	94	93	91	89	88	87	86	86	85	84	83	84	86	87	87	87	88	88	88	88
Tue	87	87	87	88	88	88	88	88	88	87	87	87	87	87	87	88	88	88	88	88	88	87	87	87

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	69	70	71	71	71	72	72	72	72	72	73	73	73	73	74	74	74	75	74	74	74	75	76
Thu	77	77	79	80	81	82	83	84	85	86	87	87	88	88	88	88	88	89	89	89	90	92	92	93
Fri	94	95	95	95	94	92	91	89	87	85	84	82	81	80	80	80	80	80	80	81	81	82	82	81
Sat	80	79	76	75	74	74	73	73	72	72	72	72	72	72	72	72	72	72	72	72	71	71	71	72
Sun	72	72	73	73	73	74	74	75	75	76	76	77	77	78	79	82	84	87	90	90	91	92	94	95
Mon	95	95	95	95	94	93	91	89	88	87	86	86	85	84	83	84	86	87	87	87	88	88	88	88
Tue	87	87	87	88	88	88	88	88	88	87	87	87	87	87	87	88	88	88	88	88	88	87	87	87

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	69	70	71	71	71	72	72	72	72	72	73	73	73	73	74	74	74	75	74	74	74	75	76
Thu	77	77	79	80	81	82	83	84	85	86	87	87	88	88	88	88	88	89	89	89	90	92	92	93
Fri	94	95	95	95	94	92	91	89	87	85	84	82	81	80	80	80	80	80	80	81	81	82	82	81
Sat	80	79	76	75	74	74	73	73	72	72	72	72	72	72	72	72	72	72	72	72	71	71	71	72
Sun	72	72	73	73	73	74	74	75	75	76	76	77	77	78	79	82	84	87	90	90	91	92	94	95
Mon	95	95	95	95	94	93	91	89	88	87	86	86	85	84	83	84	86	87	87	87	88	88	88	88
Tue	87	87	87	88	88	88	88	88	88	87	87	87	87	87	87	88	88	88	88	88	88	87	87	87