22 – 28 Feb 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

80.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 23 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-0.1 AQI compared with the previous week’s mean of 80.9.

Highest hourly estimate: 167 in Da Nang · 25 Feb, 12:00 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, 22 Feb	86.7Moderate	40–163	22	192 / 192
Thu, 23 Feb	72Moderate	34–116	19	192 / 192
Fri, 24 Feb	69.1Moderate	33–124	19.5	192 / 192
Sat, 25 Feb	84.6Moderate	42–167	26.3	192 / 192
Sun, 26 Feb	89.1Moderate	51–135	26.8	192 / 192
Mon, 27 Feb	84Moderate	39–150	24.6	192 / 192
Tue, 28 Feb	80.1Moderate	35–154	22.7	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	97	96	96	95	94	93	92	91	90	89	87	85	84	83	81	81	81	84	86	86	81	78	76	75
Thu	74	74	73	73	73	73	73	72	73	72	72	72	72	72	72	72	72	72	73	73	71	70	69	69
Fri	68	67	67	67	67	66	66	66	67	67	67	68	68	68	68	68	70	73	76	76	75	74	70	69
Sat	70	72	73	74	76	77	78	79	80	81	81	82	85	87	88	89	90	94	98	99	98	96	93	90
Sun	91	91	92	92	92	92	92	91	91	91	90	89	89	88	88	87	87	87	88	88	86	85	86	86
Mon	86	85	86	86	86	85	85	85	84	84	84	84	83	83	83	83	82	84	86	86	84	83	82	81
Tue	81	81	81	81	81	81	81	81	81	81	81	81	81	80	81	80	80	80	80	80	79	78	78	77

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	114.3Unhealthy for Sensitive Groups	163	39.8	168 / 168
Da Nang	93.1Moderate	167	26.8	168 / 168
Hai Phong	88.5Moderate	138	27	168 / 168
Ho Chi Minh City	84.6Moderate	140	25.2	168 / 168
Hue	77.6Moderate	110	22.2	168 / 168
Can Tho	75.9Moderate	110	21.1	168 / 168
Nha Trang	64.5Moderate	96	15.5	168 / 168
Da Lat	47.7Good	93	6.3	168 / 168

City-hours by category

Good: 110

Moderate: 1029

Unhealthy for Sensitive Groups: 164

Unhealthy: 41

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	97	96	96	95	94	93	92	91	90	89	87	85	84	83	81	81	81	84	86	86	81	78	76	75
Thu	74	74	73	73	73	73	73	72	73	72	72	72	72	72	72	72	72	72	73	73	71	70	69	69
Fri	68	67	67	67	67	66	66	66	67	67	67	68	68	68	68	68	70	73	76	76	75	74	70	69
Sat	70	72	73	74	76	77	78	79	80	81	81	82	85	87	88	89	90	94	98	99	98	96	93	90
Sun	91	91	92	92	92	92	92	91	91	91	90	89	89	88	88	87	87	87	88	88	86	85	86	86
Mon	86	85	86	86	86	85	85	85	84	84	84	84	83	83	83	83	82	84	86	86	84	83	82	81
Tue	81	81	81	81	81	81	81	81	81	81	81	81	81	80	81	80	80	80	80	80	79	78	78	77

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	97	96	96	95	94	93	92	91	90	89	87	85	84	83	81	81	81	84	86	86	81	78	76	75
Thu	74	74	73	73	73	73	73	72	73	72	72	72	72	72	72	72	72	72	73	73	71	70	69	69
Fri	68	67	67	67	67	66	66	66	67	67	67	68	68	68	68	68	70	73	76	76	75	74	70	69
Sat	70	72	73	74	76	77	78	79	80	81	81	82	85	87	88	89	90	94	98	99	98	96	93	90
Sun	91	91	92	92	92	92	92	91	91	91	90	89	89	88	88	87	87	87	88	88	86	85	86	86
Mon	86	85	86	86	86	85	85	85	84	84	84	84	83	83	83	83	82	84	86	86	84	83	82	81
Tue	81	81	81	81	81	81	81	81	81	81	81	81	81	80	81	80	80	80	80	80	79	78	78	77

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	97	96	96	95	94	93	92	91	90	89	87	85	84	83	81	81	81	84	86	86	81	78	76	75
Thu	74	74	73	73	73	73	73	72	73	72	72	72	72	72	72	72	72	72	73	73	71	70	69	69
Fri	68	67	67	67	67	66	66	66	67	67	67	68	68	68	68	68	70	73	76	76	75	74	70	69
Sat	70	72	73	74	76	77	78	79	80	81	81	82	85	87	88	89	90	94	98	99	98	96	93	90
Sun	91	91	92	92	92	92	92	91	91	91	90	89	89	88	88	87	87	87	88	88	86	85	86	86
Mon	86	85	86	86	86	85	85	85	84	84	84	84	83	83	83	83	82	84	86	86	84	83	82	81
Tue	81	81	81	81	81	81	81	81	81	81	81	81	81	80	81	80	80	80	80	80	79	78	78	77