26 Jul – 1 Aug 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

70.7Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+3.2 AQI compared with the previous week’s mean of 67.5.

Highest hourly estimate: 233 in Hanoi · 29 Jul, 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, 26 Jul	61Moderate	21–160	14.6	192 / 192
Thu, 27 Jul	70.3Moderate	24–204	18.6	192 / 192
Fri, 28 Jul	74.7Moderate	17–200	18.6	192 / 192
Sat, 29 Jul	81.7Moderate	20–233	23.3	192 / 192
Sun, 30 Jul	75.5Moderate	16–170	18	192 / 192
Mon, 31 Jul	66.4Moderate	17–181	15.4	192 / 192
Tue, 1 Aug	65.5Moderate	22–137	19.1	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	58	58	58	57	57	57	57	56	57	57	57	57	57	57	58	60	65	70	73	74	72	69	65	61
Thu	60	60	60	60	60	61	61	61	61	62	62	62	62	62	65	71	80	86	91	94	93	90	86	80
Fri	76	74	71	67	66	66	66	66	65	65	65	65	65	65	67	74	82	89	94	96	95	91	85	79
Sat	72	68	66	67	67	67	68	68	69	70	71	72	73	78	81	92	100	108	111	109	104	99	94	87
Sun	84	81	77	74	74	74	73	73	73	72	71	71	70	70	69	72	76	79	80	81	81	81	80	78
Mon	76	72	69	65	63	63	63	62	62	61	61	60	60	60	60	64	68	71	73	74	74	73	72	71
Tue	69	67	65	64	62	62	62	63	63	64	64	65	65	66	66	66	67	67	67	68	68	68	69	69

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	127.4Unhealthy for Sensitive Groups	233	46.4	168 / 168
Da Nang	100.4Unhealthy for Sensitive Groups	206	17.5	168 / 168
Hai Phong	92Moderate	200	28.7	168 / 168
Ho Chi Minh City	63.8Moderate	77	16.7	168 / 168
Hue	58.2Moderate	113	12.5	168 / 168
Nha Trang	53.7Moderate	66	11	168 / 168
Can Tho	46Good	55	8.8	168 / 168
Da Lat	24.2Good	37	4.3	168 / 168

City-hours by category

Good: 294

Moderate: 823

Unhealthy for Sensitive Groups: 134

Unhealthy: 79

Very Unhealthy: 14

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	58	58	58	57	57	57	57	56	57	57	57	57	57	57	58	60	65	70	73	74	72	69	65	61
Thu	60	60	60	60	60	61	61	61	61	62	62	62	62	62	65	71	80	86	91	94	93	90	86	80
Fri	76	74	71	67	66	66	66	66	65	65	65	65	65	65	67	74	82	89	94	96	95	91	85	79
Sat	72	68	66	67	67	67	68	68	69	70	71	72	73	78	81	92	100	108	111	109	104	99	94	87
Sun	84	81	77	74	74	74	73	73	73	72	71	71	70	70	69	72	76	79	80	81	81	81	80	78
Mon	76	72	69	65	63	63	63	62	62	61	61	60	60	60	60	64	68	71	73	74	74	73	72	71
Tue	69	67	65	64	62	62	62	63	63	64	64	65	65	66	66	66	67	67	67	68	68	68	69	69

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	58	58	58	57	57	57	57	56	57	57	57	57	57	57	58	60	65	70	73	74	72	69	65	61
Thu	60	60	60	60	60	61	61	61	61	62	62	62	62	62	65	71	80	86	91	94	93	90	86	80
Fri	76	74	71	67	66	66	66	66	65	65	65	65	65	65	67	74	82	89	94	96	95	91	85	79
Sat	72	68	66	67	67	67	68	68	69	70	71	72	73	78	81	92	100	108	111	109	104	99	94	87
Sun	84	81	77	74	74	74	73	73	73	72	71	71	70	70	69	72	76	79	80	81	81	81	80	78
Mon	76	72	69	65	63	63	63	62	62	61	61	60	60	60	60	64	68	71	73	74	74	73	72	71
Tue	69	67	65	64	62	62	62	63	63	64	64	65	65	66	66	66	67	67	67	68	68	68	69	69

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	58	58	58	57	57	57	57	56	57	57	57	57	57	57	58	60	65	70	73	74	72	69	65	61
Thu	60	60	60	60	60	61	61	61	61	62	62	62	62	62	65	71	80	86	91	94	93	90	86	80
Fri	76	74	71	67	66	66	66	66	65	65	65	65	65	65	67	74	82	89	94	96	95	91	85	79
Sat	72	68	66	67	67	67	68	68	69	70	71	72	73	78	81	92	100	108	111	109	104	99	94	87
Sun	84	81	77	74	74	74	73	73	73	72	71	71	70	70	69	72	76	79	80	81	81	81	80	78
Mon	76	72	69	65	63	63	63	62	62	61	61	60	60	60	60	64	68	71	73	74	74	73	72	71
Tue	69	67	65	64	62	62	62	63	63	64	64	65	65	66	66	66	67	67	67	68	68	68	69	69