2 – 8 Oct 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

78.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 21.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+0.7 AQI compared with the previous week’s mean of 77.4.

Highest hourly estimate: 189 in Hanoi · 5 Oct, 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, 2 Oct	66.3Moderate	49–135	16.5	192 / 192
Thu, 3 Oct	64.8Moderate	39–108	15.9	192 / 192
Fri, 4 Oct	76.5Moderate	23–163	23.8	192 / 192
Sat, 5 Oct	94.7Moderate	29–189	28.3	192 / 192
Sun, 6 Oct	94.1Moderate	26–177	25.5	192 / 192
Mon, 7 Oct	79.8Moderate	26–149	21.7	192 / 192
Tue, 8 Oct	70.5Moderate	21–124	21.5	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	67	66	65	64	65	64	65	64	64	64	64	64	64	65	67	68	70	70	69	67	66	64
Thu	64	64	64	63	63	63	63	63	62	62	62	62	63	63	64	64	66	70	72	71	69	68	66	65
Fri	65	64	64	64	64	64	64	64	65	65	67	68	70	72	74	81	92	101	107	105	99	91	85	83
Sat	82	82	84	85	86	86	87	87	87	88	88	88	88	89	90	98	110	120	123	119	111	103	98	97
Sun	95	92	91	91	91	91	91	91	91	90	90	90	89	89	93	98	103	106	106	103	100	97	93	89
Mon	88	86	84	83	81	80	78	76	75	75	75	75	75	75	76	77	80	89	92	90	83	76	74	73
Tue	73	72	72	71	71	71	70	70	70	69	69	69	69	69	69	69	70	72	73	73	72	71	70	70

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	106Unhealthy for Sensitive Groups	189	39.6	168 / 168
Hai Phong	95.1Moderate	181	28	168 / 168
Ho Chi Minh City	93.2Moderate	157	31.1	168 / 168
Da Nang	88Moderate	135	18	168 / 168
Can Tho	75.8Moderate	126	22.6	168 / 168
Hue	70.5Moderate	120	17.7	168 / 168
Nha Trang	57Moderate	118	11.3	168 / 168
Da Lat	39.1Good	65	6.6	168 / 168

City-hours by category

Good: 202

Moderate: 863

Unhealthy for Sensitive Groups: 217

Unhealthy: 62

Very Unhealthy: 0

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	67	66	65	64	65	64	65	64	64	64	64	64	64	65	67	68	70	70	69	67	66	64
Thu	64	64	64	63	63	63	63	63	62	62	62	62	63	63	64	64	66	70	72	71	69	68	66	65
Fri	65	64	64	64	64	64	64	64	65	65	67	68	70	72	74	81	92	101	107	105	99	91	85	83
Sat	82	82	84	85	86	86	87	87	87	88	88	88	88	89	90	98	110	120	123	119	111	103	98	97
Sun	95	92	91	91	91	91	91	91	91	90	90	90	89	89	93	98	103	106	106	103	100	97	93	89
Mon	88	86	84	83	81	80	78	76	75	75	75	75	75	75	76	77	80	89	92	90	83	76	74	73
Tue	73	72	72	71	71	71	70	70	70	69	69	69	69	69	69	69	70	72	73	73	72	71	70	70

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	67	66	65	64	65	64	65	64	64	64	64	64	64	65	67	68	70	70	69	67	66	64
Thu	64	64	64	63	63	63	63	63	62	62	62	62	63	63	64	64	66	70	72	71	69	68	66	65
Fri	65	64	64	64	64	64	64	64	65	65	67	68	70	72	74	81	92	101	107	105	99	91	85	83
Sat	82	82	84	85	86	86	87	87	87	88	88	88	88	89	90	98	110	120	123	119	111	103	98	97
Sun	95	92	91	91	91	91	91	91	91	90	90	90	89	89	93	98	103	106	106	103	100	97	93	89
Mon	88	86	84	83	81	80	78	76	75	75	75	75	75	75	76	77	80	89	92	90	83	76	74	73
Tue	73	72	72	71	71	71	70	70	70	69	69	69	69	69	69	69	70	72	73	73	72	71	70	70

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	67	66	65	64	65	64	65	64	64	64	64	64	64	65	67	68	70	70	69	67	66	64
Thu	64	64	64	63	63	63	63	63	62	62	62	62	63	63	64	64	66	70	72	71	69	68	66	65
Fri	65	64	64	64	64	64	64	64	65	65	67	68	70	72	74	81	92	101	107	105	99	91	85	83
Sat	82	82	84	85	86	86	87	87	87	88	88	88	88	89	90	98	110	120	123	119	111	103	98	97
Sun	95	92	91	91	91	91	91	91	91	90	90	90	89	89	93	98	103	106	106	103	100	97	93	89
Mon	88	86	84	83	81	80	78	76	75	75	75	75	75	75	76	77	80	89	92	90	83	76	74	73
Tue	73	72	72	71	71	71	70	70	70	69	69	69	69	69	69	69	70	72	73	73	72	71	70	70