5 – 11 Jul 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

78Weekly mean modelled AQI · Moderate

Mean PM2.5: 18.3 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.4 AQI compared with the previous week’s mean of 76.6.

Highest hourly estimate: 219 in Da Nang · 5 Jul, 00:00 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, 5 Jul	90.5Moderate	43–219	23.4	192 / 192
Thu, 6 Jul	78.9Moderate	54–179	18.3	192 / 192
Fri, 7 Jul	77.5Moderate	47–168	19.3	192 / 192
Sat, 8 Jul	72Moderate	32–178	14.6	192 / 192
Sun, 9 Jul	68.4Moderate	30–177	16.1	192 / 192
Mon, 10 Jul	77.8Moderate	33–208	18.7	192 / 192
Tue, 11 Jul	80.9Moderate	51–211	17.6	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	89	88	88	86	84	81	78	78	78	78	79	79	81	83	88	96	104	111	114	113	111	105	96	87
Thu	80	77	77	76	75	74	73	72	72	72	72	71	71	74	78	84	91	97	98	96	90	82	74	68
Fri	67	68	68	68	68	68	69	69	69	69	69	70	70	71	78	84	93	99	102	100	95	89	82	76
Sat	72	69	68	68	67	67	66	66	64	64	63	62	62	64	70	76	86	92	94	92	87	79	70	61
Sun	59	59	59	59	59	58	58	58	58	58	58	58	58	60	68	77	86	92	95	93	88	82	73	67
Mon	65	63	63	64	65	65	66	66	67	68	68	69	72	74	79	86	96	103	106	105	101	94	84	79
Tue	77	76	75	74	72	70	69	67	66	66	66	68	71	75	80	88	98	106	110	109	104	95	84	75

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	118.7Unhealthy for Sensitive Groups	219	21.1	168 / 168
Hanoi	109.4Unhealthy for Sensitive Groups	212	28.2	168 / 168
Hue	80.3Moderate	144	18	168 / 168
Ho Chi Minh City	79.2Moderate	109	24.3	168 / 168
Can Tho	71.7Moderate	101	19.9	168 / 168
Hai Phong	61.4Moderate	84	14.6	168 / 168
Nha Trang	57.4Moderate	117	11.8	168 / 168
Da Lat	45.8Good	57	8.7	168 / 168

City-hours by category

Good: 134

Moderate: 987

Unhealthy for Sensitive Groups: 137

Unhealthy: 66

Very Unhealthy: 20

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	89	88	88	86	84	81	78	78	78	78	79	79	81	83	88	96	104	111	114	113	111	105	96	87
Thu	80	77	77	76	75	74	73	72	72	72	72	71	71	74	78	84	91	97	98	96	90	82	74	68
Fri	67	68	68	68	68	68	69	69	69	69	69	70	70	71	78	84	93	99	102	100	95	89	82	76
Sat	72	69	68	68	67	67	66	66	64	64	63	62	62	64	70	76	86	92	94	92	87	79	70	61
Sun	59	59	59	59	59	58	58	58	58	58	58	58	58	60	68	77	86	92	95	93	88	82	73	67
Mon	65	63	63	64	65	65	66	66	67	68	68	69	72	74	79	86	96	103	106	105	101	94	84	79
Tue	77	76	75	74	72	70	69	67	66	66	66	68	71	75	80	88	98	106	110	109	104	95	84	75

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	89	88	88	86	84	81	78	78	78	78	79	79	81	83	88	96	104	111	114	113	111	105	96	87
Thu	80	77	77	76	75	74	73	72	72	72	72	71	71	74	78	84	91	97	98	96	90	82	74	68
Fri	67	68	68	68	68	68	69	69	69	69	69	70	70	71	78	84	93	99	102	100	95	89	82	76
Sat	72	69	68	68	67	67	66	66	64	64	63	62	62	64	70	76	86	92	94	92	87	79	70	61
Sun	59	59	59	59	59	58	58	58	58	58	58	58	58	60	68	77	86	92	95	93	88	82	73	67
Mon	65	63	63	64	65	65	66	66	67	68	68	69	72	74	79	86	96	103	106	105	101	94	84	79
Tue	77	76	75	74	72	70	69	67	66	66	66	68	71	75	80	88	98	106	110	109	104	95	84	75

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	89	88	88	86	84	81	78	78	78	78	79	79	81	83	88	96	104	111	114	113	111	105	96	87
Thu	80	77	77	76	75	74	73	72	72	72	72	71	71	74	78	84	91	97	98	96	90	82	74	68
Fri	67	68	68	68	68	68	69	69	69	69	69	70	70	71	78	84	93	99	102	100	95	89	82	76
Sat	72	69	68	68	67	67	66	66	64	64	63	62	62	64	70	76	86	92	94	92	87	79	70	61
Sun	59	59	59	59	59	58	58	58	58	58	58	58	58	60	68	77	86	92	95	93	88	82	73	67
Mon	65	63	63	64	65	65	66	66	67	68	68	69	72	74	79	86	96	103	106	105	101	94	84	79
Tue	77	76	75	74	72	70	69	67	66	66	66	68	71	75	80	88	98	106	110	109	104	95	84	75