22 – 28 Apr 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

96Weekly mean modelled AQI · Moderate

Mean PM2.5: 31.1 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+1.1 AQI compared with the previous week’s mean of 94.9.

Highest hourly estimate: 221 in Da Nang · 28 Apr, 17:00 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, 22 Apr	95.4Moderate	63–207	30.9	192 / 192
Thu, 23 Apr	97.1Moderate	67–211	29	192 / 192
Fri, 24 Apr	104.1Unhealthy for Sensitive Groups	67–183	37.4	192 / 192
Sat, 25 Apr	103.1Unhealthy for Sensitive Groups	64–190	36.7	192 / 192
Sun, 26 Apr	95Moderate	61–189	29.1	192 / 192
Mon, 27 Apr	85Moderate	59–155	23.6	192 / 192
Tue, 28 Apr	92.6Moderate	55–221	31	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	82	82	82	82	82	83	83	84	84	85	86	87	88	93	97	105	114	123	126	123	117	110	101	93
Thu	93	93	93	93	93	93	93	94	93	93	92	95	93	96	99	106	109	112	112	108	101	96	91	89
Fri	89	91	93	96	97	98	99	99	100	101	102	102	103	106	111	115	117	118	117	116	113	109	105	103
Sat	103	103	103	103	103	103	104	105	104	103	102	102	101	101	101	103	106	108	108	107	104	102	100	97
Sun	97	96	95	95	95	94	94	95	95	94	94	93	93	93	95	98	99	101	101	98	95	92	90	90
Mon	89	89	88	87	86	85	83	81	79	79	78	78	79	79	83	89	94	97	97	93	89	84	78	78
Tue	78	78	78	78	78	78	78	79	80	81	84	87	89	92	97	100	108	116	121	121	118	111	100	93

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	146.9Unhealthy for Sensitive Groups	207	63.5	168 / 168
Can Tho	118Unhealthy for Sensitive Groups	135	43.1	168 / 168
Hue	104.6Unhealthy for Sensitive Groups	188	32.7	168 / 168
Da Nang	102.3Unhealthy for Sensitive Groups	221	24.3	168 / 168
Hai Phong	83Moderate	145	24.9	168 / 168
Da Lat	77Moderate	100	22.6	168 / 168
Ho Chi Minh City	69.2Moderate	74	19.3	168 / 168
Nha Trang	67.3Moderate	78	18.3	168 / 168

City-hours by category

Good: 0

Moderate: 838

Unhealthy for Sensitive Groups: 377

Unhealthy: 116

Very Unhealthy: 13

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	82	82	82	82	82	83	83	84	84	85	86	87	88	93	97	105	114	123	126	123	117	110	101	93
Thu	93	93	93	93	93	93	93	94	93	93	92	95	93	96	99	106	109	112	112	108	101	96	91	89
Fri	89	91	93	96	97	98	99	99	100	101	102	102	103	106	111	115	117	118	117	116	113	109	105	103
Sat	103	103	103	103	103	103	104	105	104	103	102	102	101	101	101	103	106	108	108	107	104	102	100	97
Sun	97	96	95	95	95	94	94	95	95	94	94	93	93	93	95	98	99	101	101	98	95	92	90	90
Mon	89	89	88	87	86	85	83	81	79	79	78	78	79	79	83	89	94	97	97	93	89	84	78	78
Tue	78	78	78	78	78	78	78	79	80	81	84	87	89	92	97	100	108	116	121	121	118	111	100	93

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	82	82	82	82	82	83	83	84	84	85	86	87	88	93	97	105	114	123	126	123	117	110	101	93
Thu	93	93	93	93	93	93	93	94	93	93	92	95	93	96	99	106	109	112	112	108	101	96	91	89
Fri	89	91	93	96	97	98	99	99	100	101	102	102	103	106	111	115	117	118	117	116	113	109	105	103
Sat	103	103	103	103	103	103	104	105	104	103	102	102	101	101	101	103	106	108	108	107	104	102	100	97
Sun	97	96	95	95	95	94	94	95	95	94	94	93	93	93	95	98	99	101	101	98	95	92	90	90
Mon	89	89	88	87	86	85	83	81	79	79	78	78	79	79	83	89	94	97	97	93	89	84	78	78
Tue	78	78	78	78	78	78	78	79	80	81	84	87	89	92	97	100	108	116	121	121	118	111	100	93

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	82	82	82	82	82	83	83	84	84	85	86	87	88	93	97	105	114	123	126	123	117	110	101	93
Thu	93	93	93	93	93	93	93	94	93	93	92	95	93	96	99	106	109	112	112	108	101	96	91	89
Fri	89	91	93	96	97	98	99	99	100	101	102	102	103	106	111	115	117	118	117	116	113	109	105	103
Sat	103	103	103	103	103	103	104	105	104	103	102	102	101	101	101	103	106	108	108	107	104	102	100	97
Sun	97	96	95	95	95	94	94	95	95	94	94	93	93	93	95	98	99	101	101	98	95	92	90	90
Mon	89	89	88	87	86	85	83	81	79	79	78	78	79	79	83	89	94	97	97	93	89	84	78	78
Tue	78	78	78	78	78	78	78	79	80	81	84	87	89	92	97	100	108	116	121	121	118	111	100	93