16 – 22 Aug 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

82.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 22.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.7 AQI compared with the previous week’s mean of 81.2.

Highest hourly estimate: 234 in Da Nang · 17 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, 16 Aug	79.9Moderate	33–220	21.7	192 / 192
Thu, 17 Aug	89.2Moderate	38–234	25.8	192 / 192
Fri, 18 Aug	91Moderate	42–208	23.2	192 / 192
Sat, 19 Aug	87.8Moderate	42–219	23.5	192 / 192
Sun, 20 Aug	78.2Moderate	39–140	19	192 / 192
Mon, 21 Aug	74.8Moderate	40–177	20.7	192 / 192
Tue, 22 Aug	79.5Moderate	41–208	21.9	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	75	74	72	70	69	67	67	67	67	68	69	69	75	77	82	86	91	99	104	104	100	95	89	83
Thu	81	79	78	77	76	76	75	75	75	76	76	78	81	85	89	93	103	110	115	116	114	110	106	99
Fri	94	90	88	87	85	82	80	80	80	80	79	79	79	80	84	88	97	106	113	114	113	108	102	96
Sat	89	84	80	79	78	78	79	79	79	79	79	79	82	83	87	91	95	99	103	106	105	104	99	94
Sun	89	83	80	78	76	75	75	75	74	73	73	74	76	77	79	82	86	89	89	85	79	73	70	68
Mon	69	70	70	70	71	71	72	72	73	73	73	73	74	75	77	79	80	82	83	82	80	77	76	75
Tue	75	74	74	74	73	73	73	73	74	74	74	74	74	74	78	81	86	91	94	95	93	90	86	83

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	153.6Unhealthy	225	57.9	168 / 168
Da Nang	127.1Unhealthy for Sensitive Groups	234	26.9	168 / 168
Hai Phong	84.1Moderate	179	22.3	168 / 168
Ho Chi Minh City	75.1Moderate	90	22.7	168 / 168
Hue	67.9Moderate	140	16.9	168 / 168
Nha Trang	65.2Moderate	139	14.1	168 / 168
Can Tho	45.9Good	58	9.1	168 / 168
Da Lat	44.3Good	51	8.1	168 / 168

City-hours by category

Good: 264

Moderate: 760

Unhealthy for Sensitive Groups: 166

Unhealthy: 112

Very Unhealthy: 42

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	75	74	72	70	69	67	67	67	67	68	69	69	75	77	82	86	91	99	104	104	100	95	89	83
Thu	81	79	78	77	76	76	75	75	75	76	76	78	81	85	89	93	103	110	115	116	114	110	106	99
Fri	94	90	88	87	85	82	80	80	80	80	79	79	79	80	84	88	97	106	113	114	113	108	102	96
Sat	89	84	80	79	78	78	79	79	79	79	79	79	82	83	87	91	95	99	103	106	105	104	99	94
Sun	89	83	80	78	76	75	75	75	74	73	73	74	76	77	79	82	86	89	89	85	79	73	70	68
Mon	69	70	70	70	71	71	72	72	73	73	73	73	74	75	77	79	80	82	83	82	80	77	76	75
Tue	75	74	74	74	73	73	73	73	74	74	74	74	74	74	78	81	86	91	94	95	93	90	86	83

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	75	74	72	70	69	67	67	67	67	68	69	69	75	77	82	86	91	99	104	104	100	95	89	83
Thu	81	79	78	77	76	76	75	75	75	76	76	78	81	85	89	93	103	110	115	116	114	110	106	99
Fri	94	90	88	87	85	82	80	80	80	80	79	79	79	80	84	88	97	106	113	114	113	108	102	96
Sat	89	84	80	79	78	78	79	79	79	79	79	79	82	83	87	91	95	99	103	106	105	104	99	94
Sun	89	83	80	78	76	75	75	75	74	73	73	74	76	77	79	82	86	89	89	85	79	73	70	68
Mon	69	70	70	70	71	71	72	72	73	73	73	73	74	75	77	79	80	82	83	82	80	77	76	75
Tue	75	74	74	74	73	73	73	73	74	74	74	74	74	74	78	81	86	91	94	95	93	90	86	83

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	75	74	72	70	69	67	67	67	67	68	69	69	75	77	82	86	91	99	104	104	100	95	89	83
Thu	81	79	78	77	76	76	75	75	75	76	76	78	81	85	89	93	103	110	115	116	114	110	106	99
Fri	94	90	88	87	85	82	80	80	80	80	79	79	79	80	84	88	97	106	113	114	113	108	102	96
Sat	89	84	80	79	78	78	79	79	79	79	79	79	82	83	87	91	95	99	103	106	105	104	99	94
Sun	89	83	80	78	76	75	75	75	74	73	73	74	76	77	79	82	86	89	89	85	79	73	70	68
Mon	69	70	70	70	71	71	72	72	73	73	73	73	74	75	77	79	80	82	83	82	80	77	76	75
Tue	75	74	74	74	73	73	73	73	74	74	74	74	74	74	78	81	86	91	94	95	93	90	86	83