19 – 25 Jul 2023 · Vietnam · Wednesday to Tuesday, UTC+7

Vietnam weekly air quality

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

67.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 17.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Vietnam’s official index.

-6.4 AQI compared with the previous week’s mean of 73.9.

Highest hourly estimate: 211 in Da Nang · 20 Jul, 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, 19 Jul	58.6Moderate	20–113	16.4	192 / 192
Thu, 20 Jul	70.5Moderate	29–211	17.7	192 / 192
Fri, 21 Jul	76.4Moderate	40–167	22.1	192 / 192
Sat, 22 Jul	76.5Moderate	35–158	21	192 / 192
Sun, 23 Jul	64.4Moderate	31–150	14.5	192 / 192
Mon, 24 Jul	62.3Moderate	34–125	14.6	192 / 192
Tue, 25 Jul	63.6Moderate	28–170	14.2	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	57	55	56	55	55	55	56	56	56	56	57	57	57	58	58	62	64	65	65	64	62	60	60	60
Thu	61	61	62	62	62	62	62	62	62	61	61	61	65	69	73	76	78	81	86	88	89	87	83	78
Fri	72	68	67	68	69	69	70	70	71	71	71	71	73	77	80	84	89	91	92	90	87	82	77	76
Sat	76	76	76	76	76	76	76	77	78	78	78	78	78	78	78	78	77	77	77	77	76	75	74	74
Sun	73	72	71	70	69	68	67	65	64	64	64	63	63	62	62	61	61	61	62	63	62	60	59	59
Mon	59	59	59	59	59	59	59	59	59	59	59	59	59	62	65	67	71	74	73	70	65	62	60	60
Tue	59	59	59	59	59	59	59	59	59	59	59	60	63	67	70	72	75	76	76	73	67	61	58	58

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	104.2Unhealthy for Sensitive Groups	158	36.2	168 / 168
Da Nang	81.5Moderate	211	15	168 / 168
Hai Phong	80.3Moderate	123	24.7	168 / 168
Hue	66.9Moderate	117	15.7	168 / 168
Nha Trang	63.2Moderate	97	14.7	168 / 168
Ho Chi Minh City	63Moderate	69	16.4	168 / 168
Can Tho	41.7Good	51	7.7	168 / 168
Da Lat	38.8Good	59	7.4	168 / 168

City-hours by category

Good: 283

Moderate: 926

Unhealthy for Sensitive Groups: 102

Unhealthy: 29

Very Unhealthy: 4

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	57	55	56	55	55	55	56	56	56	56	57	57	57	58	58	62	64	65	65	64	62	60	60	60
Thu	61	61	62	62	62	62	62	62	62	61	61	61	65	69	73	76	78	81	86	88	89	87	83	78
Fri	72	68	67	68	69	69	70	70	71	71	71	71	73	77	80	84	89	91	92	90	87	82	77	76
Sat	76	76	76	76	76	76	76	77	78	78	78	78	78	78	78	78	77	77	77	77	76	75	74	74
Sun	73	72	71	70	69	68	67	65	64	64	64	63	63	62	62	61	61	61	62	63	62	60	59	59
Mon	59	59	59	59	59	59	59	59	59	59	59	59	59	62	65	67	71	74	73	70	65	62	60	60
Tue	59	59	59	59	59	59	59	59	59	59	59	60	63	67	70	72	75	76	76	73	67	61	58	58

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	57	55	56	55	55	55	56	56	56	56	57	57	57	58	58	62	64	65	65	64	62	60	60	60
Thu	61	61	62	62	62	62	62	62	62	61	61	61	65	69	73	76	78	81	86	88	89	87	83	78
Fri	72	68	67	68	69	69	70	70	71	71	71	71	73	77	80	84	89	91	92	90	87	82	77	76
Sat	76	76	76	76	76	76	76	77	78	78	78	78	78	78	78	78	77	77	77	77	76	75	74	74
Sun	73	72	71	70	69	68	67	65	64	64	64	63	63	62	62	61	61	61	62	63	62	60	59	59
Mon	59	59	59	59	59	59	59	59	59	59	59	59	59	62	65	67	71	74	73	70	65	62	60	60
Tue	59	59	59	59	59	59	59	59	59	59	59	60	63	67	70	72	75	76	76	73	67	61	58	58

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	57	55	56	55	55	55	56	56	56	56	57	57	57	58	58	62	64	65	65	64	62	60	60	60
Thu	61	61	62	62	62	62	62	62	62	61	61	61	65	69	73	76	78	81	86	88	89	87	83	78
Fri	72	68	67	68	69	69	70	70	71	71	71	71	73	77	80	84	89	91	92	90	87	82	77	76
Sat	76	76	76	76	76	76	76	77	78	78	78	78	78	78	78	78	77	77	77	77	76	75	74	74
Sun	73	72	71	70	69	68	67	65	64	64	64	63	63	62	62	61	61	61	62	63	62	60	59	59
Mon	59	59	59	59	59	59	59	59	59	59	59	59	59	62	65	67	71	74	73	70	65	62	60	60
Tue	59	59	59	59	59	59	59	59	59	59	59	60	63	67	70	72	75	76	76	73	67	61	58	58