9 – 15 Nov 2022 · Thailand · Wednesday to Tuesday, UTC+7

Thailand weekly air quality

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

86.5Weekly mean modelled AQI · Moderate

Mean PM2.5: 26.1 µg/m³. Both means cover the selected cities hour by hour. They are not a national average or Thailand’s official index.

+2.2 AQI compared with the previous week’s mean of 84.3.

Highest hourly estimate: 299 in Bangkok · 12 Nov, 19:00 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, 9 Nov	88Moderate	31–261	26.6	192 / 192
Thu, 10 Nov	83Moderate	45–204	26.2	192 / 192
Fri, 11 Nov	93.6Moderate	47–252	29.8	192 / 192
Sat, 12 Nov	95.7Moderate	46–299	29.7	192 / 192
Sun, 13 Nov	95.4Moderate	51–281	28.9	192 / 192
Mon, 14 Nov	76.9Moderate	39–187	19.2	192 / 192
Tue, 15 Nov	72.4Moderate	27–268	22.2	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	86	86	86	86	86	86	86	85	84	84	83	82	81	81	83	88	94	100	102	102	97	95	91	83
Thu	81	82	82	81	82	82	82	82	82	82	82	81	81	81	81	82	87	90	90	85	81	83	85	88
Fri	90	92	93	94	92	89	85	85	86	86	86	86	87	87	87	93	104	112	114	112	107	100	94	87
Sat	86	85	84	83	82	81	80	79	79	79	80	85	88	92	98	108	118	124	126	123	116	111	108	103
Sun	97	95	92	88	87	87	87	86	86	86	86	86	87	90	93	105	116	109	108	105	101	110	106	100
Mon	90	84	81	81	81	80	80	79	79	78	78	77	76	76	75	75	75	75	74	72	71	71	70	70
Tue	69	68	67	66	66	67	67	68	68	68	68	68	68	72	73	73	77	80	82	82	83	82	80	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
Bangkok	191Unhealthy	299	84	168 / 168
Pattaya	110.4Unhealthy for Sensitive Groups	229	27.1	168 / 168
Chiang Mai	100Moderate	161	31.4	168 / 168
Chiang Rai	65.8Moderate	70	17	168 / 168
Nakhon Ratchasima	64.1Moderate	85	15.7	168 / 168
Khon Kaen	62.3Moderate	86	14.4	168 / 168
Phuket	51.5Moderate	108	10.2	168 / 168
Hat Yai	46.5Good	57	8.8	168 / 168

City-hours by category

Good: 189

Moderate: 860

Unhealthy for Sensitive Groups: 98

Unhealthy: 134

Very Unhealthy: 63

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	86	86	86	86	86	86	86	85	84	84	83	82	81	81	83	88	94	100	102	102	97	95	91	83
Thu	81	82	82	81	82	82	82	82	82	82	82	81	81	81	81	82	87	90	90	85	81	83	85	88
Fri	90	92	93	94	92	89	85	85	86	86	86	86	87	87	87	93	104	112	114	112	107	100	94	87
Sat	86	85	84	83	82	81	80	79	79	79	80	85	88	92	98	108	118	124	126	123	116	111	108	103
Sun	97	95	92	88	87	87	87	86	86	86	86	86	87	90	93	105	116	109	108	105	101	110	106	100
Mon	90	84	81	81	81	80	80	79	79	78	78	77	76	76	75	75	75	75	74	72	71	71	70	70
Tue	69	68	67	66	66	67	67	68	68	68	68	68	68	72	73	73	77	80	82	82	83	82	80	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	86	86	86	86	86	86	86	85	84	84	83	82	81	81	83	88	94	100	102	102	97	95	91	83
Thu	81	82	82	81	82	82	82	82	82	82	82	81	81	81	81	82	87	90	90	85	81	83	85	88
Fri	90	92	93	94	92	89	85	85	86	86	86	86	87	87	87	93	104	112	114	112	107	100	94	87
Sat	86	85	84	83	82	81	80	79	79	79	80	85	88	92	98	108	118	124	126	123	116	111	108	103
Sun	97	95	92	88	87	87	87	86	86	86	86	86	87	90	93	105	116	109	108	105	101	110	106	100
Mon	90	84	81	81	81	80	80	79	79	78	78	77	76	76	75	75	75	75	74	72	71	71	70	70
Tue	69	68	67	66	66	67	67	68	68	68	68	68	68	72	73	73	77	80	82	82	83	82	80	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	86	86	86	86	86	86	86	85	84	84	83	82	81	81	83	88	94	100	102	102	97	95	91	83
Thu	81	82	82	81	82	82	82	82	82	82	82	81	81	81	81	82	87	90	90	85	81	83	85	88
Fri	90	92	93	94	92	89	85	85	86	86	86	86	87	87	87	93	104	112	114	112	107	100	94	87
Sat	86	85	84	83	82	81	80	79	79	79	80	85	88	92	98	108	118	124	126	123	116	111	108	103
Sun	97	95	92	88	87	87	87	86	86	86	86	86	87	90	93	105	116	109	108	105	101	110	106	100
Mon	90	84	81	81	81	80	80	79	79	78	78	77	76	76	75	75	75	75	74	72	71	71	70	70
Tue	69	68	67	66	66	67	67	68	68	68	68	68	68	72	73	73	77	80	82	82	83	82	80	78