6 – 12 Mar 2024 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

79.9Weekly mean modelled AQI · Moderate

Mean PM2.5: 24.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+13.2 AQI compared with the previous week’s mean of 66.7.

Highest hourly estimate: 201 in Khon Kaen · 7 Mar, 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, 6 Mar	75.7Moderate	61–140	21.6	192 / 192
Thu, 7 Mar	84Moderate	60–201	27.2	192 / 192
Fri, 8 Mar	85.2Moderate	53–130	26.6	192 / 192
Sat, 9 Mar	82.1Moderate	53–113	22.1	192 / 192
Sun, 10 Mar	74.4Moderate	52–110	24.7	192 / 192
Mon, 11 Mar	80.2Moderate	63–116	23.7	192 / 192
Tue, 12 Mar	78Moderate	61–99	23.7	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	71	72	72	72	73	73	73	73	73	74	74	74	74	73	74	76	81	85	88	86	82	78	75	74
Thu	74	74	74	74	74	74	74	74	75	75	76	77	77	78	81	88	99	107	111	108	102	97	90	86
Fri	85	86	86	86	87	87	87	87	87	87	86	86	86	85	85	84	84	83	84	85	84	83	83	83
Sat	84	84	84	84	84	85	85	84	84	84	84	83	83	83	82	82	82	81	81	80	79	78	77	76
Sun	75	74	73	73	72	72	72	72	72	72	72	73	73	73	74	74	75	77	78	77	77	78	79	79
Mon	80	81	81	81	82	82	82	81	81	81	81	81	80	80	79	79	79	80	81	80	79	78	78	78
Tue	78	78	77	77	77	77	77	77	77	78	78	78	78	79	79	79	79	79	79	79	79	79	79	78

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
Khon Kaen	101.6Unhealthy for Sensitive Groups	201	33.6	168 / 168
Chiang Rai	89.9Moderate	130	29.9	168 / 168
Chiang Mai	86.3Moderate	146	26.3	168 / 168
Nakhon Ratchasima	83.9Moderate	97	27.4	168 / 168
Bangkok	76.4Moderate	149	22.3	168 / 168
Phuket	69.8Moderate	88	19.5	168 / 168
Pattaya	68.4Moderate	80	18.8	168 / 168
Hat Yai	63.2Moderate	77	16	168 / 168

City-hours by category

Good: 0

Moderate: 1179

Unhealthy for Sensitive Groups: 158

Unhealthy: 6

Very Unhealthy: 1

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	71	72	72	72	73	73	73	73	73	74	74	74	74	73	74	76	81	85	88	86	82	78	75	74
Thu	74	74	74	74	74	74	74	74	75	75	76	77	77	78	81	88	99	107	111	108	102	97	90	86
Fri	85	86	86	86	87	87	87	87	87	87	86	86	86	85	85	84	84	83	84	85	84	83	83	83
Sat	84	84	84	84	84	85	85	84	84	84	84	83	83	83	82	82	82	81	81	80	79	78	77	76
Sun	75	74	73	73	72	72	72	72	72	72	72	73	73	73	74	74	75	77	78	77	77	78	79	79
Mon	80	81	81	81	82	82	82	81	81	81	81	81	80	80	79	79	79	80	81	80	79	78	78	78
Tue	78	78	77	77	77	77	77	77	77	78	78	78	78	79	79	79	79	79	79	79	79	79	79	78

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	71	72	72	72	73	73	73	73	73	74	74	74	74	73	74	76	81	85	88	86	82	78	75	74
Thu	74	74	74	74	74	74	74	74	75	75	76	77	77	78	81	88	99	107	111	108	102	97	90	86
Fri	85	86	86	86	87	87	87	87	87	87	86	86	86	85	85	84	84	83	84	85	84	83	83	83
Sat	84	84	84	84	84	85	85	84	84	84	84	83	83	83	82	82	82	81	81	80	79	78	77	76
Sun	75	74	73	73	72	72	72	72	72	72	72	73	73	73	74	74	75	77	78	77	77	78	79	79
Mon	80	81	81	81	82	82	82	81	81	81	81	81	80	80	79	79	79	80	81	80	79	78	78	78
Tue	78	78	77	77	77	77	77	77	77	78	78	78	78	79	79	79	79	79	79	79	79	79	79	78

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	71	72	72	72	73	73	73	73	73	74	74	74	74	73	74	76	81	85	88	86	82	78	75	74
Thu	74	74	74	74	74	74	74	74	75	75	76	77	77	78	81	88	99	107	111	108	102	97	90	86
Fri	85	86	86	86	87	87	87	87	87	87	86	86	86	85	85	84	84	83	84	85	84	83	83	83
Sat	84	84	84	84	84	85	85	84	84	84	84	83	83	83	82	82	82	81	81	80	79	78	77	76
Sun	75	74	73	73	72	72	72	72	72	72	72	73	73	73	74	74	75	77	78	77	77	78	79	79
Mon	80	81	81	81	82	82	82	81	81	81	81	81	80	80	79	79	79	80	81	80	79	78	78	78
Tue	78	78	77	77	77	77	77	77	77	78	78	78	78	79	79	79	79	79	79	79	79	79	79	78