29 Mar – 4 Apr 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

85.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 27.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-5 AQI compared with the previous week’s mean of 90.1.

Highest hourly estimate: 197 in Hanoi · 4 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, 29 Mar	73.1Moderate	54–145	24.9	192 / 192
Thu, 30 Mar	84.2Moderate	56–152	25.4	192 / 192
Fri, 31 Mar	87Moderate	56–180	35	192 / 192
Sat, 1 Apr	97.2Moderate	63–179	34.1	192 / 192
Sun, 2 Apr	89.8Moderate	61–173	26.4	192 / 192
Mon, 3 Apr	82.8Moderate	55–152	24.3	192 / 192
Tue, 4 Apr	81.4Moderate	53–197	25	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	70	70	70	70	70	70	70	70	70	71	71	71	72	73	73	74	74	75	76	76	78	79	80	81
Thu	82	83	83	84	84	84	84	85	84	85	85	85	85	85	85	85	85	85	85	85	84	84	83	83
Fri	82	83	82	82	82	83	83	83	83	84	85	86	86	87	88	89	90	90	91	92	93	94	95	95
Sat	96	96	97	96	97	97	98	98	98	98	98	98	98	98	98	98	98	98	98	97	97	96	96	96
Sun	96	96	95	94	94	93	92	91	91	91	91	90	90	89	88	88	87	87	87	87	86	85	85	84
Mon	84	84	83	83	83	83	83	83	83	82	82	82	82	81	81	81	81	86	89	89	84	80	79	79
Tue	79	79	79	79	79	79	79	79	79	79	79	79	79	79	79	80	81	88	92	91	88	86	82	81

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	143.5Unhealthy for Sensitive Groups	197	60.3	168 / 168
Hai Phong	111.7Unhealthy for Sensitive Groups	158	40.2	168 / 168
Hue	90.8Moderate	137	30.9	168 / 168
Da Nang	73.3Moderate	107	23.1	168 / 168
Da Lat	72.6Moderate	86	21	168 / 168
Ho Chi Minh City	63.7Moderate	73	16.4	168 / 168
Can Tho	62.7Moderate	71	15.9	168 / 168
Nha Trang	61.9Moderate	73	15.4	168 / 168

City-hours by category

Good: 0

Moderate: 1025

Unhealthy for Sensitive Groups: 211

Unhealthy: 108

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

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

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