12 – 18 Jul 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

73.9Weekly 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.

-4.1 AQI compared with the previous week’s mean of 78.

Highest hourly estimate: 230 in Da Nang · 14 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, 12 Jul	78.3Moderate	42–225	18	192 / 192
Thu, 13 Jul	79.6Moderate	44–227	17.7	192 / 192
Fri, 14 Jul	80.8Moderate	41–230	19.5	192 / 192
Sat, 15 Jul	76.1Moderate	36–185	20.5	192 / 192
Sun, 16 Jul	74.7Moderate	29–169	22.2	192 / 192
Mon, 17 Jul	66.8Moderate	19–160	15.4	192 / 192
Tue, 18 Jul	60.9Moderate	15–184	13.7	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	72	70	69	69	68	66	66	66	66	66	70	72	72	76	81	87	92	101	104	103	97	89	81	77
Thu	74	72	71	69	67	67	67	67	67	67	67	71	72	74	79	86	95	104	109	108	102	94	85	77
Fri	74	72	70	69	67	66	66	66	66	66	66	66	71	74	78	88	95	101	107	110	109	105	99	90
Sat	81	78	76	75	74	72	71	71	71	70	70	70	69	73	75	79	81	83	86	87	85	82	77	73
Sun	71	72	73	73	74	74	75	75	76	77	77	77	76	76	75	74	75	76	77	74	74	74	74	73
Mon	73	73	72	71	71	70	69	68	67	67	67	67	66	66	66	66	66	66	66	65	64	62	61	59
Tue	58	57	56	56	56	55	55	55	55	55	55	56	56	58	63	67	69	72	73	72	71	68	65	61

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
Da Nang	112.1Unhealthy for Sensitive Groups	230	21	168 / 168
Hanoi	100.6Unhealthy for Sensitive Groups	194	31.4	168 / 168
Hai Phong	97.5Moderate	169	32.4	168 / 168
Ho Chi Minh City	74.4Moderate	95	20.5	168 / 168
Nha Trang	61.1Moderate	113	12	168 / 168
Hue	56.5Moderate	118	11.4	168 / 168
Can Tho	51.8Moderate	61	10.4	168 / 168
Da Lat	37.1Good	52	6.2	168 / 168

City-hours by category

Good: 251

Moderate: 875

Unhealthy for Sensitive Groups: 133

Unhealthy: 64

Very Unhealthy: 21

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	72	70	69	69	68	66	66	66	66	66	70	72	72	76	81	87	92	101	104	103	97	89	81	77
Thu	74	72	71	69	67	67	67	67	67	67	67	71	72	74	79	86	95	104	109	108	102	94	85	77
Fri	74	72	70	69	67	66	66	66	66	66	66	66	71	74	78	88	95	101	107	110	109	105	99	90
Sat	81	78	76	75	74	72	71	71	71	70	70	70	69	73	75	79	81	83	86	87	85	82	77	73
Sun	71	72	73	73	74	74	75	75	76	77	77	77	76	76	75	74	75	76	77	74	74	74	74	73
Mon	73	73	72	71	71	70	69	68	67	67	67	67	66	66	66	66	66	66	66	65	64	62	61	59
Tue	58	57	56	56	56	55	55	55	55	55	55	56	56	58	63	67	69	72	73	72	71	68	65	61

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	72	70	69	69	68	66	66	66	66	66	70	72	72	76	81	87	92	101	104	103	97	89	81	77
Thu	74	72	71	69	67	67	67	67	67	67	67	71	72	74	79	86	95	104	109	108	102	94	85	77
Fri	74	72	70	69	67	66	66	66	66	66	66	66	71	74	78	88	95	101	107	110	109	105	99	90
Sat	81	78	76	75	74	72	71	71	71	70	70	70	69	73	75	79	81	83	86	87	85	82	77	73
Sun	71	72	73	73	74	74	75	75	76	77	77	77	76	76	75	74	75	76	77	74	74	74	74	73
Mon	73	73	72	71	71	70	69	68	67	67	67	67	66	66	66	66	66	66	66	65	64	62	61	59
Tue	58	57	56	56	56	55	55	55	55	55	55	56	56	58	63	67	69	72	73	72	71	68	65	61

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	72	70	69	69	68	66	66	66	66	66	70	72	72	76	81	87	92	101	104	103	97	89	81	77
Thu	74	72	71	69	67	67	67	67	67	67	67	71	72	74	79	86	95	104	109	108	102	94	85	77
Fri	74	72	70	69	67	66	66	66	66	66	66	66	71	74	78	88	95	101	107	110	109	105	99	90
Sat	81	78	76	75	74	72	71	71	71	70	70	70	69	73	75	79	81	83	86	87	85	82	77	73
Sun	71	72	73	73	74	74	75	75	76	77	77	77	76	76	75	74	75	76	77	74	74	74	74	73
Mon	73	73	72	71	71	70	69	68	67	67	67	67	66	66	66	66	66	66	66	65	64	62	61	59
Tue	58	57	56	56	56	55	55	55	55	55	55	56	56	58	63	67	69	72	73	72	71	68	65	61