2 – 8 Nov 2022 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

84.3Weekly mean modelled AQI · Moderate

Mean PM2.5: 25.2 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+5.6 AQI compared with the previous week’s mean of 78.7.

Highest hourly estimate: 294 in Bangkok · 8 Nov, 14:00 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, 2 Nov	86.2Moderate	57–272	23.8	192 / 192
Thu, 3 Nov	87Moderate	51–237	24.6	192 / 192
Fri, 4 Nov	82.2Moderate	36–244	23.7	192 / 192
Sat, 5 Nov	79.4Moderate	30–246	22.5	192 / 192
Sun, 6 Nov	79Moderate	26–262	21.7	192 / 192
Mon, 7 Nov	85.5Moderate	24–287	27	192 / 192
Tue, 8 Nov	90.6Moderate	27–294	33.2	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	76	76	76	76	77	77	77	78	78	79	79	79	80	83	86	93	101	107	109	106	101	96	91	89
Thu	86	84	80	78	79	79	79	79	79	80	80	80	80	82	86	91	100	106	108	105	100	94	90	86
Fri	82	80	80	79	79	79	79	79	78	77	77	77	77	76	77	86	91	96	97	94	89	85	82	77
Sat	76	76	76	77	77	77	77	77	76	76	76	76	76	76	76	79	86	91	92	90	85	83	81	75
Sun	74	74	73	73	72	72	72	72	72	72	75	77	76	77	82	86	92	96	96	93	87	82	77	74
Mon	74	75	75	75	75	76	76	77	77	78	78	78	79	82	84	90	100	107	111	109	103	97	91	88
Tue	83	81	81	81	80	80	80	80	81	84	92	93	91	93	102	100	104	106	105	102	96	102	93	86

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	188.4Unhealthy	294	71.8	168 / 168
Chiang Mai	103.2Unhealthy for Sensitive Groups	188	31.1	168 / 168
Khon Kaen	76.7Moderate	85	23.7	168 / 168
Nakhon Ratchasima	74.8Moderate	86	22.6	168 / 168
Pattaya	73Moderate	184	17.9	168 / 168
Chiang Rai	66.3Moderate	70	17.9	168 / 168
Hat Yai	47.8Good	65	9	168 / 168
Phuket	44Good	72	7.6	168 / 168

City-hours by category

Good: 203

Moderate: 911

Unhealthy for Sensitive Groups: 59

Unhealthy: 110

Very Unhealthy: 61

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	76	76	76	76	77	77	77	78	78	79	79	79	80	83	86	93	101	107	109	106	101	96	91	89
Thu	86	84	80	78	79	79	79	79	79	80	80	80	80	82	86	91	100	106	108	105	100	94	90	86
Fri	82	80	80	79	79	79	79	79	78	77	77	77	77	76	77	86	91	96	97	94	89	85	82	77
Sat	76	76	76	77	77	77	77	77	76	76	76	76	76	76	76	79	86	91	92	90	85	83	81	75
Sun	74	74	73	73	72	72	72	72	72	72	75	77	76	77	82	86	92	96	96	93	87	82	77	74
Mon	74	75	75	75	75	76	76	77	77	78	78	78	79	82	84	90	100	107	111	109	103	97	91	88
Tue	83	81	81	81	80	80	80	80	81	84	92	93	91	93	102	100	104	106	105	102	96	102	93	86

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	76	76	76	76	77	77	77	78	78	79	79	79	80	83	86	93	101	107	109	106	101	96	91	89
Thu	86	84	80	78	79	79	79	79	79	80	80	80	80	82	86	91	100	106	108	105	100	94	90	86
Fri	82	80	80	79	79	79	79	79	78	77	77	77	77	76	77	86	91	96	97	94	89	85	82	77
Sat	76	76	76	77	77	77	77	77	76	76	76	76	76	76	76	79	86	91	92	90	85	83	81	75
Sun	74	74	73	73	72	72	72	72	72	72	75	77	76	77	82	86	92	96	96	93	87	82	77	74
Mon	74	75	75	75	75	76	76	77	77	78	78	78	79	82	84	90	100	107	111	109	103	97	91	88
Tue	83	81	81	81	80	80	80	80	81	84	92	93	91	93	102	100	104	106	105	102	96	102	93	86

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	76	76	76	76	77	77	77	78	78	79	79	79	80	83	86	93	101	107	109	106	101	96	91	89
Thu	86	84	80	78	79	79	79	79	79	80	80	80	80	82	86	91	100	106	108	105	100	94	90	86
Fri	82	80	80	79	79	79	79	79	78	77	77	77	77	76	77	86	91	96	97	94	89	85	82	77
Sat	76	76	76	77	77	77	77	77	76	76	76	76	76	76	76	79	86	91	92	90	85	83	81	75
Sun	74	74	73	73	72	72	72	72	72	72	75	77	76	77	82	86	92	96	96	93	87	82	77	74
Mon	74	75	75	75	75	76	76	77	77	78	78	78	79	82	84	90	100	107	111	109	103	97	91	88
Tue	83	81	81	81	80	80	80	80	81	84	92	93	91	93	102	100	104	106	105	102	96	102	93	86