6 – 12 Sep 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

83.8Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+16.8 AQI compared with the previous week’s mean of 67.

Highest hourly estimate: 229 in Da Nang · 8 Sept, 18:00 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, 6 Sep	75.5Moderate	22–202	25.4	192 / 192
Thu, 7 Sep	92.9Moderate	37–208	27	192 / 192
Fri, 8 Sep	93.2Moderate	40–229	26	192 / 192
Sat, 9 Sep	90Moderate	40–215	26.1	192 / 192
Sun, 10 Sep	82.9Moderate	27–202	24.6	192 / 192
Mon, 11 Sep	76.3Moderate	22–163	20.6	192 / 192
Tue, 12 Sep	75.8Moderate	26–148	21.8	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	67	67	66	67	67	68	69	70	72	72	73	74	74	74	74	77	81	84	86	86	87	87	86	85
Thu	84	83	84	84	85	86	86	86	86	86	86	87	87	91	95	99	104	107	108	108	106	104	100	97
Fri	95	94	93	92	91	90	89	87	85	84	84	85	87	89	92	94	97	103	106	106	104	101	97	95
Sat	94	91	90	89	87	84	82	82	82	82	82	82	84	87	90	93	96	101	103	101	98	95	94	93
Sun	91	89	87	84	82	79	79	78	78	77	77	77	76	76	79	83	86	88	90	89	89	88	86	85
Mon	84	81	79	76	75	74	74	73	73	73	73	73	73	73	72	72	76	79	81	81	81	81	80	78
Tue	74	72	71	71	71	72	72	72	72	72	72	73	73	73	73	74	78	82	84	85	85	85	83	82

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	151.5Unhealthy	202	60.4	168 / 168
Da Nang	125.5Unhealthy for Sensitive Groups	229	27.1	168 / 168
Hanoi	117Unhealthy for Sensitive Groups	159	42.3	168 / 168
Hue	70Moderate	102	19.1	168 / 168
Ho Chi Minh City	66.8Moderate	75	18.9	168 / 168
Nha Trang	56.6Moderate	92	12.3	168 / 168
Can Tho	45.4Good	55	8.9	168 / 168
Da Lat	37.7Good	55	7.1	168 / 168

City-hours by category

Good: 274

Moderate: 700

Unhealthy for Sensitive Groups: 165

Unhealthy: 180

Very Unhealthy: 25

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	67	67	66	67	67	68	69	70	72	72	73	74	74	74	74	77	81	84	86	86	87	87	86	85
Thu	84	83	84	84	85	86	86	86	86	86	86	87	87	91	95	99	104	107	108	108	106	104	100	97
Fri	95	94	93	92	91	90	89	87	85	84	84	85	87	89	92	94	97	103	106	106	104	101	97	95
Sat	94	91	90	89	87	84	82	82	82	82	82	82	84	87	90	93	96	101	103	101	98	95	94	93
Sun	91	89	87	84	82	79	79	78	78	77	77	77	76	76	79	83	86	88	90	89	89	88	86	85
Mon	84	81	79	76	75	74	74	73	73	73	73	73	73	73	72	72	76	79	81	81	81	81	80	78
Tue	74	72	71	71	71	72	72	72	72	72	72	73	73	73	73	74	78	82	84	85	85	85	83	82

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	67	67	66	67	67	68	69	70	72	72	73	74	74	74	74	77	81	84	86	86	87	87	86	85
Thu	84	83	84	84	85	86	86	86	86	86	86	87	87	91	95	99	104	107	108	108	106	104	100	97
Fri	95	94	93	92	91	90	89	87	85	84	84	85	87	89	92	94	97	103	106	106	104	101	97	95
Sat	94	91	90	89	87	84	82	82	82	82	82	82	84	87	90	93	96	101	103	101	98	95	94	93
Sun	91	89	87	84	82	79	79	78	78	77	77	77	76	76	79	83	86	88	90	89	89	88	86	85
Mon	84	81	79	76	75	74	74	73	73	73	73	73	73	73	72	72	76	79	81	81	81	81	80	78
Tue	74	72	71	71	71	72	72	72	72	72	72	73	73	73	73	74	78	82	84	85	85	85	83	82

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	67	67	66	67	67	68	69	70	72	72	73	74	74	74	74	77	81	84	86	86	87	87	86	85
Thu	84	83	84	84	85	86	86	86	86	86	86	87	87	91	95	99	104	107	108	108	106	104	100	97
Fri	95	94	93	92	91	90	89	87	85	84	84	85	87	89	92	94	97	103	106	106	104	101	97	95
Sat	94	91	90	89	87	84	82	82	82	82	82	82	84	87	90	93	96	101	103	101	98	95	94	93
Sun	91	89	87	84	82	79	79	78	78	77	77	77	76	76	79	83	86	88	90	89	89	88	86	85
Mon	84	81	79	76	75	74	74	73	73	73	73	73	73	73	72	72	76	79	81	81	81	81	80	78
Tue	74	72	71	71	71	72	72	72	72	72	72	73	73	73	73	74	78	82	84	85	85	85	83	82