8 – 14 Feb 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

70.2Weekly mean modelled AQI · Moderate

Mean PM2.5: 19.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-22.7 AQI compared with the previous week’s mean of 92.9.

Highest hourly estimate: 193 in Hai Phong · 8 Feb, 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, 8 Feb	75.6Moderate	35–193	15.7	192 / 192
Thu, 9 Feb	59.5Moderate	31–82	15.2	192 / 192
Fri, 10 Feb	61.1Moderate	39–83	15.4	192 / 192
Sat, 11 Feb	63.7Moderate	41–82	17	192 / 192
Sun, 12 Feb	69Moderate	50–129	21.4	192 / 192
Mon, 13 Feb	78.3Moderate	54–112	26.6	192 / 192
Tue, 14 Feb	84.1Moderate	61–123	23.4	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	86	85	84	83	82	82	81	81	80	79	79	78	78	77	76	75	74	73	68	64	64	63	62	62
Thu	62	61	60	60	60	59	59	59	58	59	59	59	59	59	59	60	59	60	59	60	60	60	60	61
Fri	61	61	61	62	61	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	61	61	61	61
Sat	62	61	62	62	62	63	63	63	63	64	64	64	64	64	64	65	65	65	65	65	65	65	65	65
Sun	65	65	66	66	66	66	66	66	67	67	67	68	68	69	69	70	70	71	75	76	75	74	73	73
Mon	73	74	74	74	75	75	75	76	76	77	77	78	79	79	80	81	81	82	82	82	82	83	83	83
Tue	84	84	85	86	86	87	87	88	88	89	89	89	87	86	84	83	82	81	80	80	80	79	78	78

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	95.2Moderate	193	27.6	168 / 168
Hanoi	84.4Moderate	129	26.1	168 / 168
Hue	82.5Moderate	123	25.9	168 / 168
Da Nang	71.8Moderate	102	20.9	168 / 168
Ho Chi Minh City	61.5Moderate	67	15.2	168 / 168
Nha Trang	60.6Moderate	69	14.6	168 / 168
Can Tho	56.8Moderate	70	13.1	168 / 168
Da Lat	48.6Good	68	10.5	168 / 168

City-hours by category

Good: 99

Moderate: 1147

Unhealthy for Sensitive Groups: 81

Unhealthy: 17

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	86	85	84	83	82	82	81	81	80	79	79	78	78	77	76	75	74	73	68	64	64	63	62	62
Thu	62	61	60	60	60	59	59	59	58	59	59	59	59	59	59	60	59	60	59	60	60	60	60	61
Fri	61	61	61	62	61	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	61	61	61	61
Sat	62	61	62	62	62	63	63	63	63	64	64	64	64	64	64	65	65	65	65	65	65	65	65	65
Sun	65	65	66	66	66	66	66	66	67	67	67	68	68	69	69	70	70	71	75	76	75	74	73	73
Mon	73	74	74	74	75	75	75	76	76	77	77	78	79	79	80	81	81	82	82	82	82	83	83	83
Tue	84	84	85	86	86	87	87	88	88	89	89	89	87	86	84	83	82	81	80	80	80	79	78	78

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	86	85	84	83	82	82	81	81	80	79	79	78	78	77	76	75	74	73	68	64	64	63	62	62
Thu	62	61	60	60	60	59	59	59	58	59	59	59	59	59	59	60	59	60	59	60	60	60	60	61
Fri	61	61	61	62	61	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	61	61	61	61
Sat	62	61	62	62	62	63	63	63	63	64	64	64	64	64	64	65	65	65	65	65	65	65	65	65
Sun	65	65	66	66	66	66	66	66	67	67	67	68	68	69	69	70	70	71	75	76	75	74	73	73
Mon	73	74	74	74	75	75	75	76	76	77	77	78	79	79	80	81	81	82	82	82	82	83	83	83
Tue	84	84	85	86	86	87	87	88	88	89	89	89	87	86	84	83	82	81	80	80	80	79	78	78

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	86	85	84	83	82	82	81	81	80	79	79	78	78	77	76	75	74	73	68	64	64	63	62	62
Thu	62	61	60	60	60	59	59	59	58	59	59	59	59	59	59	60	59	60	59	60	60	60	60	61
Fri	61	61	61	62	61	62	62	62	62	62	61	61	61	61	61	61	61	61	61	61	61	61	61	61
Sat	62	61	62	62	62	63	63	63	63	64	64	64	64	64	64	65	65	65	65	65	65	65	65	65
Sun	65	65	66	66	66	66	66	66	67	67	67	68	68	69	69	70	70	71	75	76	75	74	73	73
Mon	73	74	74	74	75	75	75	76	76	77	77	78	79	79	80	81	81	82	82	82	82	83	83	83
Tue	84	84	85	86	86	87	87	88	88	89	89	89	87	86	84	83	82	81	80	80	80	79	78	78