5 – 11 Apr 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

89.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 30.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+4.2 AQI compared with the previous week’s mean of 85.1.

Highest hourly estimate: 201 in Hanoi · 5 Apr, 19:00 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, 5 Apr	86.8Moderate	55–201	29	192 / 192
Thu, 6 Apr	86.7Moderate	52–155	23.9	192 / 192
Fri, 7 Apr	75.7Moderate	52–116	22.3	192 / 192
Sat, 8 Apr	79.2Moderate	41–169	25.8	192 / 192
Sun, 9 Apr	86.2Moderate	49–172	34.1	192 / 192
Mon, 10 Apr	104Unhealthy for Sensitive Groups	66–175	43.2	192 / 192
Tue, 11 Apr	106.7Unhealthy for Sensitive Groups	70–174	36	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	81	82	82	82	82	82	82	83	83	84	85	86	86	87	88	96	101	101	97	91	89	89
Thu	90	90	90	90	90	90	90	90	90	90	89	88	88	87	86	85	84	85	86	84	82	79	79	79
Fri	78	78	78	77	77	77	77	76	76	76	76	76	76	75	75	75	74	74	74	74	74	74	74	75
Sat	76	77	78	79	80	80	80	80	80	79	79	78	78	78	79	79	79	80	80	80	80	81	81	81
Sun	81	81	81	82	82	82	82	83	83	84	84	85	85	86	87	88	89	89	91	92	92	93	94	95
Mon	95	97	97	98	99	99	100	101	102	103	104	104	105	106	106	107	108	108	109	110	109	109	110	110
Tue	110	109	110	109	109	109	109	108	108	108	108	108	108	108	107	107	106	105	104	103	103	102	102	102

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	150.3Unhealthy	201	66	168 / 168
Hai Phong	128.3Unhealthy for Sensitive Groups	165	48.7	168 / 168
Hue	87.6Moderate	123	28.8	168 / 168
Da Nang	85.6Moderate	145	26	168 / 168
Ho Chi Minh City	69.7Moderate	102	21	168 / 168
Can Tho	69Moderate	95	21	168 / 168
Da Lat	64.3Moderate	96	18.4	168 / 168
Nha Trang	59.6Moderate	80	14.9	168 / 168

City-hours by category

Good: 38

Moderate: 940

Unhealthy for Sensitive Groups: 197

Unhealthy: 168

Very Unhealthy: 1

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	81	82	82	82	82	82	82	83	83	84	85	86	86	87	88	96	101	101	97	91	89	89
Thu	90	90	90	90	90	90	90	90	90	90	89	88	88	87	86	85	84	85	86	84	82	79	79	79
Fri	78	78	78	77	77	77	77	76	76	76	76	76	76	75	75	75	74	74	74	74	74	74	74	75
Sat	76	77	78	79	80	80	80	80	80	79	79	78	78	78	79	79	79	80	80	80	80	81	81	81
Sun	81	81	81	82	82	82	82	83	83	84	84	85	85	86	87	88	89	89	91	92	92	93	94	95
Mon	95	97	97	98	99	99	100	101	102	103	104	104	105	106	106	107	108	108	109	110	109	109	110	110
Tue	110	109	110	109	109	109	109	108	108	108	108	108	108	108	107	107	106	105	104	103	103	102	102	102

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	81	82	82	82	82	82	82	83	83	84	85	86	86	87	88	96	101	101	97	91	89	89
Thu	90	90	90	90	90	90	90	90	90	90	89	88	88	87	86	85	84	85	86	84	82	79	79	79
Fri	78	78	78	77	77	77	77	76	76	76	76	76	76	75	75	75	74	74	74	74	74	74	74	75
Sat	76	77	78	79	80	80	80	80	80	79	79	78	78	78	79	79	79	80	80	80	80	81	81	81
Sun	81	81	81	82	82	82	82	83	83	84	84	85	85	86	87	88	89	89	91	92	92	93	94	95
Mon	95	97	97	98	99	99	100	101	102	103	104	104	105	106	106	107	108	108	109	110	109	109	110	110
Tue	110	109	110	109	109	109	109	108	108	108	108	108	108	108	107	107	106	105	104	103	103	102	102	102

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	81	82	82	82	82	82	82	83	83	84	85	86	86	87	88	96	101	101	97	91	89	89
Thu	90	90	90	90	90	90	90	90	90	90	89	88	88	87	86	85	84	85	86	84	82	79	79	79
Fri	78	78	78	77	77	77	77	76	76	76	76	76	76	75	75	75	74	74	74	74	74	74	74	75
Sat	76	77	78	79	80	80	80	80	80	79	79	78	78	78	79	79	79	80	80	80	80	81	81	81
Sun	81	81	81	82	82	82	82	83	83	84	84	85	85	86	87	88	89	89	91	92	92	93	94	95
Mon	95	97	97	98	99	99	100	101	102	103	104	104	105	106	106	107	108	108	109	110	109	109	110	110
Tue	110	109	110	109	109	109	109	108	108	108	108	108	108	108	107	107	106	105	104	103	103	102	102	102