13 – 19 Aug 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

82.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 22.8 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-16.4 AQI compared with the previous week’s mean of 98.5.

Highest hourly estimate: 227 in Da Nang · 19 Aug, 19:00 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, 13 Aug	91Moderate	41–213	27.6	192 / 192
Thu, 14 Aug	96.3Moderate	41–203	28.3	192 / 192
Fri, 15 Aug	91.8Moderate	40–197	21.6	192 / 192
Sat, 16 Aug	69.4Moderate	36–131	16.7	192 / 192
Sun, 17 Aug	60.1Moderate	18–112	17	192 / 192
Mon, 18 Aug	78Moderate	18–222	22	192 / 192
Tue, 19 Aug	87.7Moderate	26–227	26.3	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	98	94	89	86	85	83	81	80	80	79	79	79	81	84	89	94	99	103	107	107	107	105	100	97
Thu	94	91	88	84	83	83	83	83	84	85	86	87	87	89	95	100	108	119	124	123	120	113	105	99
Fri	96	94	93	91	89	88	86	85	84	83	82	85	88	91	94	96	102	107	107	104	99	92	85	81
Sat	78	75	72	72	71	71	70	70	69	69	69	69	68	67	67	66	67	68	69	69	69	69	68	66
Sun	63	63	62	61	61	61	60	60	59	59	59	58	58	58	58	58	60	61	62	62	61	60	59	60
Mon	61	63	64	65	65	66	67	68	68	69	70	71	77	78	84	88	92	96	97	97	95	93	91	90
Tue	86	83	78	75	72	72	72	73	73	74	74	75	80	82	85	92	99	106	110	111	111	109	108	106

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	137Unhealthy for Sensitive Groups	203	54.9	168 / 168
Hai Phong	106.9Unhealthy for Sensitive Groups	201	36.5	168 / 168
Da Nang	102.4Unhealthy for Sensitive Groups	227	14	168 / 168
Ho Chi Minh City	88.6Moderate	114	30.1	168 / 168
Nha Trang	68.5Moderate	136	12.6	168 / 168
Hue	60.3Moderate	98	14.3	168 / 168
Can Tho	56Moderate	76	12.9	168 / 168
Da Lat	36.6Good	52	6.9	168 / 168

City-hours by category

Good: 271

Moderate: 712

Unhealthy for Sensitive Groups: 243

Unhealthy: 95

Very Unhealthy: 23

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	98	94	89	86	85	83	81	80	80	79	79	79	81	84	89	94	99	103	107	107	107	105	100	97
Thu	94	91	88	84	83	83	83	83	84	85	86	87	87	89	95	100	108	119	124	123	120	113	105	99
Fri	96	94	93	91	89	88	86	85	84	83	82	85	88	91	94	96	102	107	107	104	99	92	85	81
Sat	78	75	72	72	71	71	70	70	69	69	69	69	68	67	67	66	67	68	69	69	69	69	68	66
Sun	63	63	62	61	61	61	60	60	59	59	59	58	58	58	58	58	60	61	62	62	61	60	59	60
Mon	61	63	64	65	65	66	67	68	68	69	70	71	77	78	84	88	92	96	97	97	95	93	91	90
Tue	86	83	78	75	72	72	72	73	73	74	74	75	80	82	85	92	99	106	110	111	111	109	108	106

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	98	94	89	86	85	83	81	80	80	79	79	79	81	84	89	94	99	103	107	107	107	105	100	97
Thu	94	91	88	84	83	83	83	83	84	85	86	87	87	89	95	100	108	119	124	123	120	113	105	99
Fri	96	94	93	91	89	88	86	85	84	83	82	85	88	91	94	96	102	107	107	104	99	92	85	81
Sat	78	75	72	72	71	71	70	70	69	69	69	69	68	67	67	66	67	68	69	69	69	69	68	66
Sun	63	63	62	61	61	61	60	60	59	59	59	58	58	58	58	58	60	61	62	62	61	60	59	60
Mon	61	63	64	65	65	66	67	68	68	69	70	71	77	78	84	88	92	96	97	97	95	93	91	90
Tue	86	83	78	75	72	72	72	73	73	74	74	75	80	82	85	92	99	106	110	111	111	109	108	106

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	98	94	89	86	85	83	81	80	80	79	79	79	81	84	89	94	99	103	107	107	107	105	100	97
Thu	94	91	88	84	83	83	83	83	84	85	86	87	87	89	95	100	108	119	124	123	120	113	105	99
Fri	96	94	93	91	89	88	86	85	84	83	82	85	88	91	94	96	102	107	107	104	99	92	85	81
Sat	78	75	72	72	71	71	70	70	69	69	69	69	68	67	67	66	67	68	69	69	69	69	68	66
Sun	63	63	62	61	61	61	60	60	59	59	59	58	58	58	58	58	60	61	62	62	61	60	59	60
Mon	61	63	64	65	65	66	67	68	68	69	70	71	77	78	84	88	92	96	97	97	95	93	91	90
Tue	86	83	78	75	72	72	72	73	73	74	74	75	80	82	85	92	99	106	110	111	111	109	108	106