19 – 25 Oct 2022 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 27.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+2 AQI compared with the previous week’s mean of 81.9.

Highest hourly estimate: 197 in Hai Phong · 23 Oct, 22:00 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, 19 Oct	79.7Moderate	51–118	20.3	192 / 192
Thu, 20 Oct	67.7Moderate	50–94	17.1	192 / 192
Fri, 21 Oct	69.1Moderate	42–106	22.3	192 / 192
Sat, 22 Oct	79.7Moderate	49–158	27.3	192 / 192
Sun, 23 Oct	94.7Moderate	39–197	38.6	192 / 192
Mon, 24 Oct	105Unhealthy for Sensitive Groups	38–196	37.9	192 / 192
Tue, 25 Oct	91.7Moderate	51–173	26.9	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	87	86	86	85	85	84	83	82	82	81	81	80	79	79	78	78	77	77	77	76	75	73	72	72
Thu	71	71	71	71	70	70	69	69	68	68	68	68	67	67	67	67	66	66	66	66	66	66	65	65
Fri	65	65	65	66	66	67	67	68	68	68	69	69	69	69	69	70	71	72	72	72	73	73	73	74
Sat	75	76	77	78	78	78	79	79	79	79	79	79	79	79	79	80	81	82	82	82	83	83	84	84
Sun	84	85	85	85	86	86	88	89	91	93	95	96	97	98	99	101	102	103	103	103	102	102	101	101
Mon	102	103	103	103	103	104	104	103	103	103	103	103	103	104	104	105	107	110	112	111	110	108	107	106
Tue	104	103	102	102	101	100	98	97	94	92	91	90	89	89	88	87	87	86	85	85	84	83	83	82

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	131.1Unhealthy for Sensitive Groups	197	57.6	168 / 168
Hanoi	120.3Unhealthy for Sensitive Groups	173	50.2	168 / 168
Ho Chi Minh City	86.1Moderate	125	28.3	168 / 168
Can Tho	77.3Moderate	105	23.8	168 / 168
Hue	71.8Moderate	111	17.8	168 / 168
Da Nang	70.6Moderate	119	15	168 / 168
Nha Trang	65.1Moderate	94	15.6	168 / 168
Da Lat	49.3Good	57	9.3	168 / 168

City-hours by category

Good: 85

Moderate: 963

Unhealthy for Sensitive Groups: 187

Unhealthy: 109

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	87	86	86	85	85	84	83	82	82	81	81	80	79	79	78	78	77	77	77	76	75	73	72	72
Thu	71	71	71	71	70	70	69	69	68	68	68	68	67	67	67	67	66	66	66	66	66	66	65	65
Fri	65	65	65	66	66	67	67	68	68	68	69	69	69	69	69	70	71	72	72	72	73	73	73	74
Sat	75	76	77	78	78	78	79	79	79	79	79	79	79	79	79	80	81	82	82	82	83	83	84	84
Sun	84	85	85	85	86	86	88	89	91	93	95	96	97	98	99	101	102	103	103	103	102	102	101	101
Mon	102	103	103	103	103	104	104	103	103	103	103	103	103	104	104	105	107	110	112	111	110	108	107	106
Tue	104	103	102	102	101	100	98	97	94	92	91	90	89	89	88	87	87	86	85	85	84	83	83	82

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	87	86	86	85	85	84	83	82	82	81	81	80	79	79	78	78	77	77	77	76	75	73	72	72
Thu	71	71	71	71	70	70	69	69	68	68	68	68	67	67	67	67	66	66	66	66	66	66	65	65
Fri	65	65	65	66	66	67	67	68	68	68	69	69	69	69	69	70	71	72	72	72	73	73	73	74
Sat	75	76	77	78	78	78	79	79	79	79	79	79	79	79	79	80	81	82	82	82	83	83	84	84
Sun	84	85	85	85	86	86	88	89	91	93	95	96	97	98	99	101	102	103	103	103	102	102	101	101
Mon	102	103	103	103	103	104	104	103	103	103	103	103	103	104	104	105	107	110	112	111	110	108	107	106
Tue	104	103	102	102	101	100	98	97	94	92	91	90	89	89	88	87	87	86	85	85	84	83	83	82

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	87	86	86	85	85	84	83	82	82	81	81	80	79	79	78	78	77	77	77	76	75	73	72	72
Thu	71	71	71	71	70	70	69	69	68	68	68	68	67	67	67	67	66	66	66	66	66	66	65	65
Fri	65	65	65	66	66	67	67	68	68	68	69	69	69	69	69	70	71	72	72	72	73	73	73	74
Sat	75	76	77	78	78	78	79	79	79	79	79	79	79	79	79	80	81	82	82	82	83	83	84	84
Sun	84	85	85	85	86	86	88	89	91	93	95	96	97	98	99	101	102	103	103	103	102	102	101	101
Mon	102	103	103	103	103	104	104	103	103	103	103	103	103	104	104	105	107	110	112	111	110	108	107	106
Tue	104	103	102	102	101	100	98	97	94	92	91	90	89	89	88	87	87	86	85	85	84	83	83	82