14 – 20 Aug 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

100.6Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 30.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+14.9 AQI compared with the previous week’s mean of 85.7.

Highest hourly estimate: 226 in Da Nang · 18 Aug, 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, 14 Aug	91.4Moderate	49–207	28	192 / 192
Thu, 15 Aug	100.4Unhealthy for Sensitive Groups	51–215	33.4	192 / 192
Fri, 16 Aug	104.8Unhealthy for Sensitive Groups	52–223	31.7	192 / 192
Sat, 17 Aug	104.6Unhealthy for Sensitive Groups	56–217	30.9	192 / 192
Sun, 18 Aug	105Unhealthy for Sensitive Groups	55–226	29.7	192 / 192
Mon, 19 Aug	100.6Unhealthy for Sensitive Groups	55–214	32.1	192 / 192
Tue, 20 Aug	97.1Moderate	56–209	27.4	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	76	75	75	75	75	75	76	77	78	78	79	81	85	89	93	99	110	118	124	124	121	114	104	97
Thu	93	91	90	90	90	91	91	92	92	92	92	92	94	96	99	103	108	113	119	122	122	119	114	109
Fri	103	101	98	96	93	93	93	93	93	94	94	94	96	98	100	107	117	124	128	128	126	122	116	109
Sat	103	100	98	95	94	93	92	92	91	91	91	92	94	98	102	111	118	124	127	127	126	124	118	110
Sun	104	102	100	98	96	95	96	96	95	95	95	94	97	98	102	107	113	120	124	126	125	121	115	108
Mon	101	98	96	94	92	92	92	93	93	94	94	94	94	96	99	103	110	114	116	116	114	109	107	104
Tue	101	98	94	91	91	90	89	89	89	89	89	89	89	93	93	99	107	113	117	115	109	105	100	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
Hanoi	162.4Unhealthy	214	62.8	168 / 168
Hai Phong	151.6Unhealthy	214	57.9	168 / 168
Da Nang	141.1Unhealthy for Sensitive Groups	226	30	168 / 168
Ho Chi Minh City	84Moderate	94	27.4	168 / 168
Hue	75.7Moderate	140	19.9	168 / 168
Nha Trang	73.8Moderate	128	18.7	168 / 168
Can Tho	59.1Moderate	70	14.1	168 / 168
Da Lat	56.9Moderate	63	13	168 / 168

City-hours by category

Good: 2

Moderate: 875

Unhealthy for Sensitive Groups: 192

Unhealthy: 204

Very Unhealthy: 71

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	76	75	75	75	75	75	76	77	78	78	79	81	85	89	93	99	110	118	124	124	121	114	104	97
Thu	93	91	90	90	90	91	91	92	92	92	92	92	94	96	99	103	108	113	119	122	122	119	114	109
Fri	103	101	98	96	93	93	93	93	93	94	94	94	96	98	100	107	117	124	128	128	126	122	116	109
Sat	103	100	98	95	94	93	92	92	91	91	91	92	94	98	102	111	118	124	127	127	126	124	118	110
Sun	104	102	100	98	96	95	96	96	95	95	95	94	97	98	102	107	113	120	124	126	125	121	115	108
Mon	101	98	96	94	92	92	92	93	93	94	94	94	94	96	99	103	110	114	116	116	114	109	107	104
Tue	101	98	94	91	91	90	89	89	89	89	89	89	89	93	93	99	107	113	117	115	109	105	100	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	76	75	75	75	75	75	76	77	78	78	79	81	85	89	93	99	110	118	124	124	121	114	104	97
Thu	93	91	90	90	90	91	91	92	92	92	92	92	94	96	99	103	108	113	119	122	122	119	114	109
Fri	103	101	98	96	93	93	93	93	93	94	94	94	96	98	100	107	117	124	128	128	126	122	116	109
Sat	103	100	98	95	94	93	92	92	91	91	91	92	94	98	102	111	118	124	127	127	126	124	118	110
Sun	104	102	100	98	96	95	96	96	95	95	95	94	97	98	102	107	113	120	124	126	125	121	115	108
Mon	101	98	96	94	92	92	92	93	93	94	94	94	94	96	99	103	110	114	116	116	114	109	107	104
Tue	101	98	94	91	91	90	89	89	89	89	89	89	89	93	93	99	107	113	117	115	109	105	100	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	76	75	75	75	75	75	76	77	78	78	79	81	85	89	93	99	110	118	124	124	121	114	104	97
Thu	93	91	90	90	90	91	91	92	92	92	92	92	94	96	99	103	108	113	119	122	122	119	114	109
Fri	103	101	98	96	93	93	93	93	93	94	94	94	96	98	100	107	117	124	128	128	126	122	116	109
Sat	103	100	98	95	94	93	92	92	91	91	91	92	94	98	102	111	118	124	127	127	126	124	118	110
Sun	104	102	100	98	96	95	96	96	95	95	95	94	97	98	102	107	113	120	124	126	125	121	115	108
Mon	101	98	96	94	92	92	92	93	93	94	94	94	94	96	99	103	110	114	116	116	114	109	107	104
Tue	101	98	94	91	91	90	89	89	89	89	89	89	89	93	93	99	107	113	117	115	109	105	100	95