24 – 30 Apr 2024 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

88.1Weekly mean modelled AQI · Moderate

Mean PM2.5: 23.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

+14.7 AQI compared with the previous week’s mean of 73.4.

Highest hourly estimate: 253 in Hanoi · 30 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, 24 Apr	78.2Moderate	35–201	22	192 / 192
Thu, 25 Apr	75.9Moderate	35–189	18.8	192 / 192
Fri, 26 Apr	89.7Moderate	39–227	24.5	192 / 192
Sat, 27 Apr	94.1Moderate	43–227	24.9	192 / 192
Sun, 28 Apr	88.6Moderate	39–242	21.2	192 / 192
Mon, 29 Apr	91Moderate	42–245	27.6	192 / 192
Tue, 30 Apr	99.4Moderate	52–253	26	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	65	66	66	67	67	68	68	69	70	71	72	73	73	79	85	90	97	101	101	98	93	86	78	75
Thu	74	74	73	72	72	71	70	70	69	68	67	67	67	69	74	79	84	92	96	95	91	85	77	68
Fri	68	68	69	69	70	70	71	72	73	74	80	82	85	93	101	107	116	122	124	122	119	111	100	88
Sat	81	80	80	80	80	80	80	80	79	79	81	82	84	88	98	108	116	123	125	124	120	113	105	95
Sun	86	82	82	82	81	81	81	81	80	80	79	78	76	80	88	98	105	111	112	110	105	98	90	83
Mon	76	75	75	75	76	76	75	75	77	78	80	83	83	89	95	103	112	119	122	120	116	110	102	91
Tue	85	85	85	85	85	84	84	84	84	83	84	85	87	94	104	114	124	131	134	133	129	121	110	94

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	161.3Unhealthy	253	57.5	168 / 168
Da Nang	124.9Unhealthy for Sensitive Groups	227	28.2	168 / 168
Hai Phong	109.8Unhealthy for Sensitive Groups	222	31.1	168 / 168
Hue	108.2Unhealthy for Sensitive Groups	189	31.8	168 / 168
Ho Chi Minh City	53.5Moderate	62	11	168 / 168
Can Tho	50.6Moderate	57	9.8	168 / 168
Da Lat	49.4Good	59	9.4	168 / 168
Nha Trang	47.4Good	65	9.7	168 / 168

City-hours by category

Good: 299

Moderate: 668

Unhealthy for Sensitive Groups: 175

Unhealthy: 125

Very Unhealthy: 77

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	65	66	66	67	67	68	68	69	70	71	72	73	73	79	85	90	97	101	101	98	93	86	78	75
Thu	74	74	73	72	72	71	70	70	69	68	67	67	67	69	74	79	84	92	96	95	91	85	77	68
Fri	68	68	69	69	70	70	71	72	73	74	80	82	85	93	101	107	116	122	124	122	119	111	100	88
Sat	81	80	80	80	80	80	80	80	79	79	81	82	84	88	98	108	116	123	125	124	120	113	105	95
Sun	86	82	82	82	81	81	81	81	80	80	79	78	76	80	88	98	105	111	112	110	105	98	90	83
Mon	76	75	75	75	76	76	75	75	77	78	80	83	83	89	95	103	112	119	122	120	116	110	102	91
Tue	85	85	85	85	85	84	84	84	84	83	84	85	87	94	104	114	124	131	134	133	129	121	110	94

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	65	66	66	67	67	68	68	69	70	71	72	73	73	79	85	90	97	101	101	98	93	86	78	75
Thu	74	74	73	72	72	71	70	70	69	68	67	67	67	69	74	79	84	92	96	95	91	85	77	68
Fri	68	68	69	69	70	70	71	72	73	74	80	82	85	93	101	107	116	122	124	122	119	111	100	88
Sat	81	80	80	80	80	80	80	80	79	79	81	82	84	88	98	108	116	123	125	124	120	113	105	95
Sun	86	82	82	82	81	81	81	81	80	80	79	78	76	80	88	98	105	111	112	110	105	98	90	83
Mon	76	75	75	75	76	76	75	75	77	78	80	83	83	89	95	103	112	119	122	120	116	110	102	91
Tue	85	85	85	85	85	84	84	84	84	83	84	85	87	94	104	114	124	131	134	133	129	121	110	94

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	65	66	66	67	67	68	68	69	70	71	72	73	73	79	85	90	97	101	101	98	93	86	78	75
Thu	74	74	73	72	72	71	70	70	69	68	67	67	67	69	74	79	84	92	96	95	91	85	77	68
Fri	68	68	69	69	70	70	71	72	73	74	80	82	85	93	101	107	116	122	124	122	119	111	100	88
Sat	81	80	80	80	80	80	80	80	79	79	81	82	84	88	98	108	116	123	125	124	120	113	105	95
Sun	86	82	82	82	81	81	81	81	80	80	79	78	76	80	88	98	105	111	112	110	105	98	90	83
Mon	76	75	75	75	76	76	75	75	77	78	80	83	83	89	95	103	112	119	122	120	116	110	102	91
Tue	85	85	85	85	85	84	84	84	84	83	84	85	87	94	104	114	124	131	134	133	129	121	110	94