9 – 15 Apr 2025 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

108.6Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 38.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+3.6 AQI compared with the previous week’s mean of 105.

Highest hourly estimate: 283 in Da Nang · 12 Apr, 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, 9 Apr	100.1Unhealthy for Sensitive Groups	63–180	29.2	192 / 192
Thu, 10 Apr	101.8Unhealthy for Sensitive Groups	63–223	41.6	192 / 192
Fri, 11 Apr	125.9Unhealthy for Sensitive Groups	70–226	42.5	192 / 192
Sat, 12 Apr	118.8Unhealthy for Sensitive Groups	62–283	34.7	192 / 192
Sun, 13 Apr	98.1Moderate	62–186	31.8	192 / 192
Mon, 14 Apr	102.5Unhealthy for Sensitive Groups	54–166	38.6	192 / 192
Tue, 15 Apr	113.2Unhealthy for Sensitive Groups	54–217	51	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	101	100	100	99	99	99	98	98	97	97	96	95	94	96	99	105	110	113	113	110	106	99	92	90
Thu	90	90	90	90	90	90	91	91	91	91	92	95	98	99	106	111	114	118	121	121	120	118	115	114
Fri	115	116	117	117	118	118	119	119	120	121	121	121	121	120	125	129	138	146	150	148	143	135	127	118
Sat	115	113	113	112	111	110	108	107	105	104	106	110	112	114	120	130	140	145	146	142	136	128	117	111
Sun	107	103	103	103	103	102	101	101	100	99	98	97	96	95	94	94	93	93	94	95	96	97	97	96
Mon	95	95	95	96	97	98	99	99	101	101	101	102	102	102	104	106	108	112	113	112	109	106	105	104
Tue	104	104	105	105	105	106	107	108	109	110	111	112	114	115	117	119	120	123	124	123	121	120	119	118

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	155.7Unhealthy	217	70.9	168 / 168
Da Nang	134.4Unhealthy for Sensitive Groups	283	38.9	168 / 168
Can Tho	126.5Unhealthy for Sensitive Groups	156	46.4	168 / 168
Hai Phong	123.2Unhealthy for Sensitive Groups	185	50.1	168 / 168
Hue	114.5Unhealthy for Sensitive Groups	206	41.5	168 / 168
Ho Chi Minh City	75.3Moderate	105	22.4	168 / 168
Nha Trang	74.7Moderate	100	20.9	168 / 168
Da Lat	64.9Moderate	73	16.9	168 / 168

City-hours by category

Good: 0

Moderate: 775

Unhealthy for Sensitive Groups: 294

Unhealthy: 230

Very Unhealthy: 45

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	101	100	100	99	99	99	98	98	97	97	96	95	94	96	99	105	110	113	113	110	106	99	92	90
Thu	90	90	90	90	90	90	91	91	91	91	92	95	98	99	106	111	114	118	121	121	120	118	115	114
Fri	115	116	117	117	118	118	119	119	120	121	121	121	121	120	125	129	138	146	150	148	143	135	127	118
Sat	115	113	113	112	111	110	108	107	105	104	106	110	112	114	120	130	140	145	146	142	136	128	117	111
Sun	107	103	103	103	103	102	101	101	100	99	98	97	96	95	94	94	93	93	94	95	96	97	97	96
Mon	95	95	95	96	97	98	99	99	101	101	101	102	102	102	104	106	108	112	113	112	109	106	105	104
Tue	104	104	105	105	105	106	107	108	109	110	111	112	114	115	117	119	120	123	124	123	121	120	119	118

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	101	100	100	99	99	99	98	98	97	97	96	95	94	96	99	105	110	113	113	110	106	99	92	90
Thu	90	90	90	90	90	90	91	91	91	91	92	95	98	99	106	111	114	118	121	121	120	118	115	114
Fri	115	116	117	117	118	118	119	119	120	121	121	121	121	120	125	129	138	146	150	148	143	135	127	118
Sat	115	113	113	112	111	110	108	107	105	104	106	110	112	114	120	130	140	145	146	142	136	128	117	111
Sun	107	103	103	103	103	102	101	101	100	99	98	97	96	95	94	94	93	93	94	95	96	97	97	96
Mon	95	95	95	96	97	98	99	99	101	101	101	102	102	102	104	106	108	112	113	112	109	106	105	104
Tue	104	104	105	105	105	106	107	108	109	110	111	112	114	115	117	119	120	123	124	123	121	120	119	118

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	101	100	100	99	99	99	98	98	97	97	96	95	94	96	99	105	110	113	113	110	106	99	92	90
Thu	90	90	90	90	90	90	91	91	91	91	92	95	98	99	106	111	114	118	121	121	120	118	115	114
Fri	115	116	117	117	118	118	119	119	120	121	121	121	121	120	125	129	138	146	150	148	143	135	127	118
Sat	115	113	113	112	111	110	108	107	105	104	106	110	112	114	120	130	140	145	146	142	136	128	117	111
Sun	107	103	103	103	103	102	101	101	100	99	98	97	96	95	94	94	93	93	94	95	96	97	97	96
Mon	95	95	95	96	97	98	99	99	101	101	101	102	102	102	104	106	108	112	113	112	109	106	105	104
Tue	104	104	105	105	105	106	107	108	109	110	111	112	114	115	117	119	120	123	124	123	121	120	119	118