1 – 7 Apr 2026 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

119.3Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 40.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+30.4 AQI compared with the previous week’s mean of 88.9.

Highest hourly estimate: 280 in Da Nang · 5 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, 1 Apr	111.8Unhealthy for Sensitive Groups	70–228	36.3	192 / 192
Thu, 2 Apr	112.2Unhealthy for Sensitive Groups	64–204	38.4	192 / 192
Fri, 3 Apr	106.4Unhealthy for Sensitive Groups	58–212	32.8	192 / 192
Sat, 4 Apr	114.2Unhealthy for Sensitive Groups	59–268	41.6	192 / 192
Sun, 5 Apr	129.2Unhealthy for Sensitive Groups	58–280	43.9	192 / 192
Mon, 6 Apr	128.2Unhealthy for Sensitive Groups	52–270	45.7	192 / 192
Tue, 7 Apr	133.2Unhealthy for Sensitive Groups	54–273	47.8	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	104	101	102	102	103	104	104	105	106	106	107	108	108	112	116	120	126	131	131	127	122	118	112	108
Thu	105	106	107	108	109	110	110	111	111	111	111	110	110	110	111	117	124	127	127	123	116	111	106	105
Fri	105	104	103	102	101	99	98	97	96	95	94	94	93	94	98	109	119	131	137	135	129	120	109	96
Sat	92	92	92	93	93	94	95	95	98	100	104	108	112	115	118	124	136	145	148	148	143	138	132	127
Sun	124	123	120	117	116	117	117	117	117	116	119	121	122	125	128	137	147	154	159	155	148	141	133	129
Mon	123	119	115	115	115	115	114	113	113	113	113	114	118	120	123	130	144	155	162	161	157	151	142	132
Tue	123	116	115	115	115	115	115	115	115	115	115	119	122	124	128	138	153	168	175	175	170	161	150	141

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	176.4Unhealthy	261	91.1	168 / 168
Da Nang	158Unhealthy	280	39.6	168 / 168
Hue	154.1Unhealthy	219	50.8	168 / 168
Can Tho	122.2Unhealthy for Sensitive Groups	155	44.8	168 / 168
Hai Phong	118.6Unhealthy for Sensitive Groups	207	40.8	168 / 168
Nha Trang	78.1Moderate	143	20.4	168 / 168
Ho Chi Minh City	76.4Moderate	138	23	168 / 168
Da Lat	70.6Moderate	117	16.9	168 / 168

City-hours by category

Good: 0

Moderate: 554

Unhealthy for Sensitive Groups: 453

Unhealthy: 226

Very Unhealthy: 111

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	104	101	102	102	103	104	104	105	106	106	107	108	108	112	116	120	126	131	131	127	122	118	112	108
Thu	105	106	107	108	109	110	110	111	111	111	111	110	110	110	111	117	124	127	127	123	116	111	106	105
Fri	105	104	103	102	101	99	98	97	96	95	94	94	93	94	98	109	119	131	137	135	129	120	109	96
Sat	92	92	92	93	93	94	95	95	98	100	104	108	112	115	118	124	136	145	148	148	143	138	132	127
Sun	124	123	120	117	116	117	117	117	117	116	119	121	122	125	128	137	147	154	159	155	148	141	133	129
Mon	123	119	115	115	115	115	114	113	113	113	113	114	118	120	123	130	144	155	162	161	157	151	142	132
Tue	123	116	115	115	115	115	115	115	115	115	115	119	122	124	128	138	153	168	175	175	170	161	150	141

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	104	101	102	102	103	104	104	105	106	106	107	108	108	112	116	120	126	131	131	127	122	118	112	108
Thu	105	106	107	108	109	110	110	111	111	111	111	110	110	110	111	117	124	127	127	123	116	111	106	105
Fri	105	104	103	102	101	99	98	97	96	95	94	94	93	94	98	109	119	131	137	135	129	120	109	96
Sat	92	92	92	93	93	94	95	95	98	100	104	108	112	115	118	124	136	145	148	148	143	138	132	127
Sun	124	123	120	117	116	117	117	117	117	116	119	121	122	125	128	137	147	154	159	155	148	141	133	129
Mon	123	119	115	115	115	115	114	113	113	113	113	114	118	120	123	130	144	155	162	161	157	151	142	132
Tue	123	116	115	115	115	115	115	115	115	115	115	119	122	124	128	138	153	168	175	175	170	161	150	141

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	104	101	102	102	103	104	104	105	106	106	107	108	108	112	116	120	126	131	131	127	122	118	112	108
Thu	105	106	107	108	109	110	110	111	111	111	111	110	110	110	111	117	124	127	127	123	116	111	106	105
Fri	105	104	103	102	101	99	98	97	96	95	94	94	93	94	98	109	119	131	137	135	129	120	109	96
Sat	92	92	92	93	93	94	95	95	98	100	104	108	112	115	118	124	136	145	148	148	143	138	132	127
Sun	124	123	120	117	116	117	117	117	117	116	119	121	122	125	128	137	147	154	159	155	148	141	133	129
Mon	123	119	115	115	115	115	114	113	113	113	113	114	118	120	123	130	144	155	162	161	157	151	142	132
Tue	123	116	115	115	115	115	115	115	115	115	115	119	122	124	128	138	153	168	175	175	170	161	150	141