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

Vietnam weekly air quality

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

104.1Weekly mean modelled AQI · Unhealthy for Sensitive Groups

Mean PM2.5: 30.9 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+8.6 AQI compared with the previous week’s mean of 95.5.

Highest hourly estimate: 266 in Da Nang · 7 May, 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, 7 May	101.5Unhealthy for Sensitive Groups	55–266	30.6	192 / 192
Thu, 8 May	115.9Unhealthy for Sensitive Groups	59–229	32.1	192 / 192
Fri, 9 May	108.5Unhealthy for Sensitive Groups	66–263	29.5	192 / 192
Sat, 10 May	94.3Moderate	53–208	29.5	192 / 192
Sun, 11 May	105.6Unhealthy for Sensitive Groups	53–194	34.8	192 / 192
Mon, 12 May	106.2Unhealthy for Sensitive Groups	54–202	32.3	192 / 192
Tue, 13 May	96.9Moderate	48–192	27.5	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	84	84	85	85	85	84	84	84	85	85	89	93	97	99	102	108	121	130	135	135	131	125	118	110
Thu	106	104	102	101	100	100	98	97	97	98	99	103	106	112	121	136	147	152	153	150	143	131	118	107
Fri	101	97	96	94	93	93	92	92	91	91	94	97	99	102	112	125	138	146	148	143	133	120	108	100
Sat	96	90	89	89	88	88	87	87	86	86	86	86	87	88	94	98	107	113	114	110	106	101	96	93
Sun	91	92	94	96	98	100	100	101	101	101	100	100	100	103	108	113	117	122	124	122	118	115	111	107
Mon	103	100	100	101	102	102	103	102	102	102	101	101	102	103	105	108	114	121	123	122	117	112	105	99
Tue	96	94	91	89	88	88	87	87	86	86	87	89	92	95	98	104	113	118	118	114	109	103	98	96

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
Can Tho	140Unhealthy for Sensitive Groups	170	55.9	168 / 168
Da Nang	135.5Unhealthy for Sensitive Groups	266	26.4	168 / 168
Hanoi	128.3Unhealthy for Sensitive Groups	220	41.5	168 / 168
Ho Chi Minh City	110.1Unhealthy for Sensitive Groups	159	40	168 / 168
Nha Trang	90.9Moderate	176	24	168 / 168
Hue	83.9Moderate	165	23.1	168 / 168
Hai Phong	83.4Moderate	149	21.7	168 / 168
Da Lat	61Moderate	74	14.6	168 / 168

City-hours by category

Good: 7

Moderate: 717

Unhealthy for Sensitive Groups: 404

Unhealthy: 176

Very Unhealthy: 40

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	84	84	85	85	85	84	84	84	85	85	89	93	97	99	102	108	121	130	135	135	131	125	118	110
Thu	106	104	102	101	100	100	98	97	97	98	99	103	106	112	121	136	147	152	153	150	143	131	118	107
Fri	101	97	96	94	93	93	92	92	91	91	94	97	99	102	112	125	138	146	148	143	133	120	108	100
Sat	96	90	89	89	88	88	87	87	86	86	86	86	87	88	94	98	107	113	114	110	106	101	96	93
Sun	91	92	94	96	98	100	100	101	101	101	100	100	100	103	108	113	117	122	124	122	118	115	111	107
Mon	103	100	100	101	102	102	103	102	102	102	101	101	102	103	105	108	114	121	123	122	117	112	105	99
Tue	96	94	91	89	88	88	87	87	86	86	87	89	92	95	98	104	113	118	118	114	109	103	98	96

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	84	84	85	85	85	84	84	84	85	85	89	93	97	99	102	108	121	130	135	135	131	125	118	110
Thu	106	104	102	101	100	100	98	97	97	98	99	103	106	112	121	136	147	152	153	150	143	131	118	107
Fri	101	97	96	94	93	93	92	92	91	91	94	97	99	102	112	125	138	146	148	143	133	120	108	100
Sat	96	90	89	89	88	88	87	87	86	86	86	86	87	88	94	98	107	113	114	110	106	101	96	93
Sun	91	92	94	96	98	100	100	101	101	101	100	100	100	103	108	113	117	122	124	122	118	115	111	107
Mon	103	100	100	101	102	102	103	102	102	102	101	101	102	103	105	108	114	121	123	122	117	112	105	99
Tue	96	94	91	89	88	88	87	87	86	86	87	89	92	95	98	104	113	118	118	114	109	103	98	96

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	84	84	85	85	85	84	84	84	85	85	89	93	97	99	102	108	121	130	135	135	131	125	118	110
Thu	106	104	102	101	100	100	98	97	97	98	99	103	106	112	121	136	147	152	153	150	143	131	118	107
Fri	101	97	96	94	93	93	92	92	91	91	94	97	99	102	112	125	138	146	148	143	133	120	108	100
Sat	96	90	89	89	88	88	87	87	86	86	86	86	87	88	94	98	107	113	114	110	106	101	96	93
Sun	91	92	94	96	98	100	100	101	101	101	100	100	100	103	108	113	117	122	124	122	118	115	111	107
Mon	103	100	100	101	102	102	103	102	102	102	101	101	102	103	105	108	114	121	123	122	117	112	105	99
Tue	96	94	91	89	88	88	87	87	86	86	87	89	92	95	98	104	113	118	118	114	109	103	98	96