26 Oct – 1 Nov 2022 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

79.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-4.6 AQI compared with the previous week’s mean of 83.9.

Highest hourly estimate: 169 in Hanoi · 26 Oct, 00:00 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, 26 Oct	73.4Moderate	21–169	19.6	192 / 192
Thu, 27 Oct	66.6Moderate	21–111	18.6	192 / 192
Fri, 28 Oct	73.3Moderate	32–148	26.5	192 / 192
Sat, 29 Oct	89.8Moderate	31–160	30	192 / 192
Sun, 30 Oct	91.9Moderate	32–167	29.9	192 / 192
Mon, 31 Oct	80.2Moderate	44–145	21.3	192 / 192
Tue, 1 Nov	79.7Moderate	57–136	26.6	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	81	81	79	78	77	77	76	75	75	74	74	73	73	73	72	72	71	71	70	69	69	68	68	67
Thu	67	67	67	67	67	67	67	66	66	66	66	66	66	66	66	67	67	67	67	68	67	67	67	67
Fri	67	67	68	68	69	69	70	71	71	72	72	73	73	74	74	75	75	76	77	78	79	80	81	83
Sat	84	85	86	87	88	89	90	91	91	91	91	92	92	92	92	91	91	91	92	93	90	90	89	89
Sun	89	89	89	90	90	91	91	91	91	90	90	90	90	90	93	94	96	97	97	96	94	94	94	94
Mon	92	90	89	87	85	84	82	81	80	80	79	79	79	78	78	77	77	77	77	76	75	74	74	73
Tue	73	74	74	75	76	77	78	80	80	80	80	80	80	80	81	81	81	82	83	83	84	84	84	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
Hanoi	120.2Unhealthy for Sensitive Groups	169	43.3	168 / 168
Ho Chi Minh City	99.8Moderate	141	35.2	168 / 168
Hai Phong	91.6Moderate	138	29.3	168 / 168
Da Nang	77.5Moderate	110	23.4	168 / 168
Can Tho	77.4Moderate	94	24.3	168 / 168
Hue	70.6Moderate	107	20.5	168 / 168
Nha Trang	57.8Moderate	81	14.1	168 / 168
Da Lat	39.3Good	59	7.1	168 / 168

City-hours by category

Good: 154

Moderate: 959

Unhealthy for Sensitive Groups: 173

Unhealthy: 58

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	81	81	79	78	77	77	76	75	75	74	74	73	73	73	72	72	71	71	70	69	69	68	68	67
Thu	67	67	67	67	67	67	67	66	66	66	66	66	66	66	66	67	67	67	67	68	67	67	67	67
Fri	67	67	68	68	69	69	70	71	71	72	72	73	73	74	74	75	75	76	77	78	79	80	81	83
Sat	84	85	86	87	88	89	90	91	91	91	91	92	92	92	92	91	91	91	92	93	90	90	89	89
Sun	89	89	89	90	90	91	91	91	91	90	90	90	90	90	93	94	96	97	97	96	94	94	94	94
Mon	92	90	89	87	85	84	82	81	80	80	79	79	79	78	78	77	77	77	77	76	75	74	74	73
Tue	73	74	74	75	76	77	78	80	80	80	80	80	80	80	81	81	81	82	83	83	84	84	84	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	81	81	79	78	77	77	76	75	75	74	74	73	73	73	72	72	71	71	70	69	69	68	68	67
Thu	67	67	67	67	67	67	67	66	66	66	66	66	66	66	66	67	67	67	67	68	67	67	67	67
Fri	67	67	68	68	69	69	70	71	71	72	72	73	73	74	74	75	75	76	77	78	79	80	81	83
Sat	84	85	86	87	88	89	90	91	91	91	91	92	92	92	92	91	91	91	92	93	90	90	89	89
Sun	89	89	89	90	90	91	91	91	91	90	90	90	90	90	93	94	96	97	97	96	94	94	94	94
Mon	92	90	89	87	85	84	82	81	80	80	79	79	79	78	78	77	77	77	77	76	75	74	74	73
Tue	73	74	74	75	76	77	78	80	80	80	80	80	80	80	81	81	81	82	83	83	84	84	84	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	81	81	79	78	77	77	76	75	75	74	74	73	73	73	72	72	71	71	70	69	69	68	68	67
Thu	67	67	67	67	67	67	67	66	66	66	66	66	66	66	66	67	67	67	67	68	67	67	67	67
Fri	67	67	68	68	69	69	70	71	71	72	72	73	73	74	74	75	75	76	77	78	79	80	81	83
Sat	84	85	86	87	88	89	90	91	91	91	91	92	92	92	92	91	91	91	92	93	90	90	89	89
Sun	89	89	89	90	90	91	91	91	91	90	90	90	90	90	93	94	96	97	97	96	94	94	94	94
Mon	92	90	89	87	85	84	82	81	80	80	79	79	79	78	78	77	77	77	77	76	75	74	74	73
Tue	73	74	74	75	76	77	78	80	80	80	80	80	80	80	81	81	81	82	83	83	84	84	84	85