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

Vietnam weekly air quality

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

87.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 29 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+0.8 AQI compared with the previous week’s mean of 86.5.

Highest hourly estimate: 191 in Hai Phong · 12 Mar, 16:00 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 Mar	69.8Moderate	41–119	19	192 / 192
Thu, 9 Mar	77.2Moderate	40–152	23.5	192 / 192
Fri, 10 Mar	87.6Moderate	45–154	29.7	192 / 192
Sat, 11 Mar	89.3Moderate	64–166	30.8	192 / 192
Sun, 12 Mar	94Moderate	57–191	34.8	192 / 192
Mon, 13 Mar	92.8Moderate	51–184	30.7	192 / 192
Tue, 14 Mar	99.9Moderate	52–181	34.4	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	69	69	69	69	68	68	68	68	67	67	67	67	67	67	67	67	70	74	78	78	77	75	71	69
Thu	69	69	69	70	71	72	72	73	74	74	75	76	77	78	78	79	80	85	88	89	88	86	83	80
Fri	79	79	79	80	80	81	81	82	82	83	83	84	84	84	85	86	93	99	104	105	104	100	95	92
Sat	91	91	91	91	91	90	90	90	90	89	89	89	88	88	88	89	89	89	89	89	89	89	89	89
Sun	89	90	90	90	91	91	92	92	93	94	95	95	96	96	96	96	96	96	98	98	96	96	96	95
Mon	95	94	94	94	93	93	92	92	91	90	90	90	89	89	88	88	89	92	96	98	98	97	98	99
Tue	98	98	97	97	97	97	98	98	98	99	99	99	99	100	100	100	103	107	109	109	105	100	97	95

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	146.1Unhealthy for Sensitive Groups	191	66.5	168 / 168
Hanoi	131Unhealthy for Sensitive Groups	181	54.1	168 / 168
Ho Chi Minh City	82.3Moderate	154	22.9	168 / 168
Hue	74.8Moderate	91	22.3	168 / 168
Da Nang	73.6Moderate	121	20.8	168 / 168
Can Tho	68.7Moderate	101	17	168 / 168
Nha Trang	64.8Moderate	75	16.9	168 / 168
Da Lat	56.6Moderate	77	11.3	168 / 168

City-hours by category

Good: 42

Moderate: 991

Unhealthy for Sensitive Groups: 176

Unhealthy: 135

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	69	69	69	69	68	68	68	68	67	67	67	67	67	67	67	67	70	74	78	78	77	75	71	69
Thu	69	69	69	70	71	72	72	73	74	74	75	76	77	78	78	79	80	85	88	89	88	86	83	80
Fri	79	79	79	80	80	81	81	82	82	83	83	84	84	84	85	86	93	99	104	105	104	100	95	92
Sat	91	91	91	91	91	90	90	90	90	89	89	89	88	88	88	89	89	89	89	89	89	89	89	89
Sun	89	90	90	90	91	91	92	92	93	94	95	95	96	96	96	96	96	96	98	98	96	96	96	95
Mon	95	94	94	94	93	93	92	92	91	90	90	90	89	89	88	88	89	92	96	98	98	97	98	99
Tue	98	98	97	97	97	97	98	98	98	99	99	99	99	100	100	100	103	107	109	109	105	100	97	95

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	69	69	69	69	68	68	68	68	67	67	67	67	67	67	67	67	70	74	78	78	77	75	71	69
Thu	69	69	69	70	71	72	72	73	74	74	75	76	77	78	78	79	80	85	88	89	88	86	83	80
Fri	79	79	79	80	80	81	81	82	82	83	83	84	84	84	85	86	93	99	104	105	104	100	95	92
Sat	91	91	91	91	91	90	90	90	90	89	89	89	88	88	88	89	89	89	89	89	89	89	89	89
Sun	89	90	90	90	91	91	92	92	93	94	95	95	96	96	96	96	96	96	98	98	96	96	96	95
Mon	95	94	94	94	93	93	92	92	91	90	90	90	89	89	88	88	89	92	96	98	98	97	98	99
Tue	98	98	97	97	97	97	98	98	98	99	99	99	99	100	100	100	103	107	109	109	105	100	97	95

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	69	69	69	69	68	68	68	68	67	67	67	67	67	67	67	67	70	74	78	78	77	75	71	69
Thu	69	69	69	70	71	72	72	73	74	74	75	76	77	78	78	79	80	85	88	89	88	86	83	80
Fri	79	79	79	80	80	81	81	82	82	83	83	84	84	84	85	86	93	99	104	105	104	100	95	92
Sat	91	91	91	91	91	90	90	90	90	89	89	89	88	88	88	89	89	89	89	89	89	89	89	89
Sun	89	90	90	90	91	91	92	92	93	94	95	95	96	96	96	96	96	96	98	98	96	96	96	95
Mon	95	94	94	94	93	93	92	92	91	90	90	90	89	89	88	88	89	92	96	98	98	97	98	99
Tue	98	98	97	97	97	97	98	98	98	99	99	99	99	100	100	100	103	107	109	109	105	100	97	95