10 – 16 Aug 2022 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

46.8Weekly mean modelled AQI · Good

Mean PM2.5: 9.6 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

Highest hourly estimate: 132 in Bangkok · 14 Aug, 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, 10 Aug	46Good	17–63	8.5	192 / 192
Thu, 11 Aug	42.3Good	17–65	8.7	192 / 192
Fri, 12 Aug	44.4Good	17–56	8.4	192 / 192
Sat, 13 Aug	46.3Good	24–60	9.6	192 / 192
Sun, 14 Aug	51.9Moderate	23–132	11.9	192 / 192
Mon, 15 Aug	52.2Moderate	22–76	11.6	192 / 192
Tue, 16 Aug	44.8Good	16–75	8.2	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	46	46	46	46	47	47	47	47	48	48	48	48	48	47	47	46	46	45	45	45	44	44	43	43
Thu	43	42	42	42	41	41	41	41	41	41	40	40	41	41	42	42	43	44	44	44	45	46	46	46
Fri	45	45	45	46	46	46	45	45	45	45	45	45	44	44	44	44	44	44	43	43	43	43	43	44
Sat	44	44	45	45	46	46	46	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47
Sun	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	55	59	61	61	58	56	53	53
Mon	52	52	53	52	53	53	53	53	54	54	54	54	53	53	52	52	52	51	51	51	50	51	51	50
Tue	50	50	49	49	48	47	47	46	45	45	44	44	43	43	43	43	43	42	43	43	43	43	42	42

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
Bangkok	60.4Moderate	132	13.3	168 / 168
Nakhon Ratchasima	56.8Moderate	76	12.5	168 / 168
Chiang Mai	55Moderate	63	11.9	168 / 168
Khon Kaen	51.4Moderate	70	11.2	168 / 168
Hat Yai	46.9Good	60	9	168 / 168
Phuket	46.1Good	53	8.3	168 / 168
Chiang Rai	36.1Good	49	6.4	168 / 168
Pattaya	22.1Good	29	3.7	168 / 168

City-hours by category

Good: 673

Moderate: 667

Unhealthy for Sensitive Groups: 4

Unhealthy: 0

Very Unhealthy: 0

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 Pollution Control Department · Air4Thai. 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	46	46	46	46	47	47	47	47	48	48	48	48	48	47	47	46	46	45	45	45	44	44	43	43
Thu	43	42	42	42	41	41	41	41	41	41	40	40	41	41	42	42	43	44	44	44	45	46	46	46
Fri	45	45	45	46	46	46	45	45	45	45	45	45	44	44	44	44	44	44	43	43	43	43	43	44
Sat	44	44	45	45	46	46	46	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47
Sun	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	55	59	61	61	58	56	53	53
Mon	52	52	53	52	53	53	53	53	54	54	54	54	53	53	52	52	52	51	51	51	50	51	51	50
Tue	50	50	49	49	48	47	47	46	45	45	44	44	43	43	43	43	43	42	43	43	43	43	42	42

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	46	46	46	46	47	47	47	47	48	48	48	48	48	47	47	46	46	45	45	45	44	44	43	43
Thu	43	42	42	42	41	41	41	41	41	41	40	40	41	41	42	42	43	44	44	44	45	46	46	46
Fri	45	45	45	46	46	46	45	45	45	45	45	45	44	44	44	44	44	44	43	43	43	43	43	44
Sat	44	44	45	45	46	46	46	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47
Sun	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	55	59	61	61	58	56	53	53
Mon	52	52	53	52	53	53	53	53	54	54	54	54	53	53	52	52	52	51	51	51	50	51	51	50
Tue	50	50	49	49	48	47	47	46	45	45	44	44	43	43	43	43	43	42	43	43	43	43	42	42

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	46	46	46	46	47	47	47	47	48	48	48	48	48	47	47	46	46	45	45	45	44	44	43	43
Thu	43	42	42	42	41	41	41	41	41	41	40	40	41	41	42	42	43	44	44	44	45	46	46	46
Fri	45	45	45	46	46	46	45	45	45	45	45	45	44	44	44	44	44	44	43	43	43	43	43	44
Sat	44	44	45	45	46	46	46	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47	47
Sun	48	48	48	48	49	49	49	49	49	50	50	50	51	51	51	52	55	59	61	61	58	56	53	53
Mon	52	52	53	52	53	53	53	53	54	54	54	54	53	53	52	52	52	51	51	51	50	51	51	50
Tue	50	50	49	49	48	47	47	46	45	45	44	44	43	43	43	43	43	42	43	43	43	43	42	42