17 – 23 Aug 2022 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

45.5Weekly mean modelled AQI · Good

Mean PM2.5: 9.5 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

-1.3 AQI compared with the previous week’s mean of 46.8.

Highest hourly estimate: 143 in Bangkok · 23 Aug, 20:00 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, 17 Aug	41.5Good	15–57	7.6	192 / 192
Thu, 18 Aug	42.1Good	16–107	9.2	192 / 192
Fri, 19 Aug	50.5Moderate	17–123	11	192 / 192
Sat, 20 Aug	47.1Good	21–70	9.8	192 / 192
Sun, 21 Aug	48.1Good	22–61	10.2	192 / 192
Mon, 22 Aug	43.9Good	22–60	7.6	192 / 192
Tue, 23 Aug	45.5Good	24–143	10.8	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	42	42	42	42	42	42	42	42	42	42	42	42	42	42	41	41	42	41	41	41	41	40	40	40
Thu	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	44	45	45	46	47	49
Fri	50	51	52	52	52	51	49	48	49	49	50	50	51	51	51	51	51	51	51	51	51	51	51	50
Sat	50	49	49	49	48	48	48	48	47	46	46	46	46	46	46	46	46	46	47	47	47	47	47	47
Sun	47	47	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	49	49	48	49
Mon	48	48	48	47	47	46	46	46	45	45	45	44	44	43	43	43	42	42	41	40	40	40	40	40
Tue	40	40	40	40	40	41	41	42	43	43	43	43	44	44	44	45	45	50	54	55	57	56	54	50

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	60.1Moderate	143	14.1	168 / 168
Nakhon Ratchasima	59.8Moderate	123	13.1	168 / 168
Chiang Mai	54.4Moderate	63	11.9	168 / 168
Khon Kaen	53.9Moderate	60	11.4	168 / 168
Phuket	43.2Good	52	7.9	168 / 168
Chiang Rai	36.1Good	50	6.8	168 / 168
Hat Yai	34.9Good	50	6.3	168 / 168
Pattaya	21.8Good	31	4.1	168 / 168

City-hours by category

Good: 748

Moderate: 583

Unhealthy for Sensitive Groups: 13

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	42	42	42	42	42	42	42	42	42	42	42	42	42	42	41	41	42	41	41	41	41	40	40	40
Thu	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	44	45	45	46	47	49
Fri	50	51	52	52	52	51	49	48	49	49	50	50	51	51	51	51	51	51	51	51	51	51	51	50
Sat	50	49	49	49	48	48	48	48	47	46	46	46	46	46	46	46	46	46	47	47	47	47	47	47
Sun	47	47	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	49	49	48	49
Mon	48	48	48	47	47	46	46	46	45	45	45	44	44	43	43	43	42	42	41	40	40	40	40	40
Tue	40	40	40	40	40	41	41	42	43	43	43	43	44	44	44	45	45	50	54	55	57	56	54	50

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	42	42	42	42	42	42	42	42	42	42	42	42	42	42	41	41	42	41	41	41	41	40	40	40
Thu	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	44	45	45	46	47	49
Fri	50	51	52	52	52	51	49	48	49	49	50	50	51	51	51	51	51	51	51	51	51	51	51	50
Sat	50	49	49	49	48	48	48	48	47	46	46	46	46	46	46	46	46	46	47	47	47	47	47	47
Sun	47	47	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	49	49	48	49
Mon	48	48	48	47	47	46	46	46	45	45	45	44	44	43	43	43	42	42	41	40	40	40	40	40
Tue	40	40	40	40	40	41	41	42	43	43	43	43	44	44	44	45	45	50	54	55	57	56	54	50

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	42	42	42	42	42	42	42	42	42	42	42	42	42	42	41	41	42	41	41	41	41	40	40	40
Thu	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	41	44	45	45	46	47	49
Fri	50	51	52	52	52	51	49	48	49	49	50	50	51	51	51	51	51	51	51	51	51	51	51	50
Sat	50	49	49	49	48	48	48	48	47	46	46	46	46	46	46	46	46	46	47	47	47	47	47	47
Sun	47	47	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	48	49	49	48	49
Mon	48	48	48	47	47	46	46	46	45	45	45	44	44	43	43	43	42	42	41	40	40	40	40	40
Tue	40	40	40	40	40	41	41	42	43	43	43	43	44	44	44	45	45	50	54	55	57	56	54	50