Phrae PM2.5 Numbers 2020

[Yom]

February 19,  2021   -   10:00

Big difference to yesterday.

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[VocalNeal]

How is the composite AQI calculated?

[Yom]

Good question, VocalNeal.

I'm not happy with this table, but you might check it yourself:

https://fit.thequint.com/health-news/explaining-air-quality-index#read-more

 

Another good read:

https://www.researchgate.net/publication/338354259_An_air_quality_composite_index_based_on_pollutant_concentration_factor_analysis

 

Some screenshots?

 Chiang Mai

 Chiang Rai

 Phayao

 Lampang

 Phrae

https://aqicn.org/here

 

Worst air on Wednesday and Thursday this week in Chiang Mai.

Qualified information and numbers here:

 http://www.air4thai.com/webV2/region.php?region=2

 

You're welcome.

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[Yom]

February 20,  2021   -   8:00

 

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[VocalNeal]

It looks somewhat obtuse and something we have to believe because the boffins say so?

I_p =  [(I_hi-I_low)/(BP_hi-BP_low)] (C_p-BP_low)+I_low,

 

 

 

 

[Yom]

It's not a question of believe.

Everyone should be able to read a PM2.5 meter.

Here and now - it shows between 25 and 30 ug/m3.

I think there are no other air pollutants to consider, 

so the AQI might be between 78 and 89.

OK?

By the way, a village nearby:  AQI 81

Phrae city(20km)  AQI  152-165 

(https://aqicn.org/here)

Some models:

  

 

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[Yom]

Feb 20,  2021   -   numbers   17:00

Lampang/Mae Moh isn't too far from Phrae,

Phayao, Chiang Rai, so I think this table

might be interesting for all.

# 4 another lignite fired power plant,

may be without correct filters.

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Edited February 20, 2021 by Yom

[VocalNeal]

OK we are 30 today. 

[Yom]

February 21,  2021   -   11:00

 

Glad to read this. ChiangMai, Phrae,

Lampang worse.

PM2.5  ug/m3    AQI

CR               36 /     101     

CM              50 /     137              

Phayao M. 38 /     107 

Phrae          51 /     139

Lampang  121 /     181                   

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[Yom]

February 22,  2021   -   9:00

Upper north much better than the rest of Thailand

20 km north of Phrae  PM2.5  165 ug/m3 ~ AQI  215

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[Yom]

Feb 22   -   18:00

 

North of    PM2.5  65  ~  AQI 156 

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[Yom]

February 23,  2021  -   Bad air

almost everywhere in Thailand even at 11:00

https://aqicn.org/here

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[Yom]

Feb 23      

e.g. between ChiangMai and Nakhon Sawan

   **** Real-time Thailand city ranking*****

PM2.5 ug/m3 ~   AQI

Lampang 137 /   193

Phrae        129 /   189

CM              48 /   132

Phayao       34 /    97

CR               27 /    82

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Edited February 23, 2021 by Yom

[Yom]

Feb 23  -   Update          PM2.5  ~  AQI

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[Yom]

February 24,  2021   -   numbers 6:00

 

     PM2.5 ug/m3   ~   AQI

Lampang        152  /   202    

Phrae              137  /   193 

ChiangMai       74  /   161

ChiangRai        63  /   155 

Phayao             42  /   117

 

Some might remember this factsheet - epa.gov

left:   PM2.5-numbers                           right:   AQI

 2012_aqi_factsheet.pdf

P.S.  I know there are different models, I trust this one.

 

By the way, at 10:00 north of Phrae PM2.5  230ug/m3 ~ AQI  280,

while Nong Muang Khai shows an AQI of 315.  Mai pen rai, 280 or 315...

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Edited February 24, 2021 by Yom

[Yom]

Feb 24,  2021   -   numbers 18:00                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Pm2.5   ~    AQI

Lampang 172   /  222

Phayao 159   /  209

Phrae 129   /  189

CR 69   /  158

CM 49   /  134

 

https://www.iqair.com/thailand/phayao

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Edited February 24, 2021 by Yom

[Yom]

February 25,  2021   -   numbers 5:00

https://www.iqair.com/thailand/phayao

   

 

     

https://aqicn.org/here  

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Edited February 24, 2021 by Yom

[Yom]

Feb 25,  2021   -   22:00

            PM2.5 ug/m3    ~     AQI

Phrae          134   /    191

Lampang   114   /    181

Phayao       106  /    177

ChiangMai   48  /    132

ChiangRai    40  /    111

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[Yom]

February 26,  2021   -   10:00

 

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[Yom]

Feb 26   -   21:00

 

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[Yom]

Februar 27,  2021   -   9:00

 

 

https://aqicn.org/here

 

     PM2.5 ug/m3  ~  AQI

Lampang      177  /   227

Phrae            152  /   202

Chiang Mai  109  /   179

Phayao            92  /   170

Chiang Rai      72  /   160

 

 

 

Village, north of Phrae   

PM2.5   327ug/m3  ~  AQI  377

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[FlorC]

It sure took a turn for the worse !! This week and certainly today.

Wasn't it prohibited to burn from febr 1 ?

So huddle around the airpurifier all day ?

[Yom]

Feb 27,  2021   -   12:00 

Different PM2.5 readings.

 

http://www.air4thai.com/webV2/region.php?region=2

  ~  AQI 164

 

 

https://aqicn.org/city/thailand/phrae-meteorological-station

  max.  AQI 239

 

 

https://aqicn.org/station/สำนักงานสาธารณสุขจังหวัดแพร่

  max.  AQI 385

 

 

Village north of Phrae, 11:00

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[Yom]

Feb 27,  2021   -   18:00

 

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[FlorC]

Nothing yet Yom ?

 

[Yom]

February 28,  2021   -   8:000

Very bad, indeed. Other places even worse!

 

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[Yom]

Feb 28,  2021   -   17:00

'Better' at night.

 

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[Tarteso]

Today began Dry season. Time to burn Thailand in a non-stop mode, until the raining comes. 
 

Today in Mae Taeng;

My shield; Air purifier and air conditioner in non-stop mode. ????

 

Edited February 28, 2021 by Tarteso

[Yom]

March 1,  2021   -   9:00

 

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[Yom]

Mar 1,  2021   -   numbers 19:00

 

          PM2.5 ug/m3   ~    AQI 

CM              52   /    141

CR               81   /    164

Lampang  175  /     225

Phayao     180  /     230

Phrae        200  /     250

 

Bangkok      24  /     77

Is there some kind of Government Agency responsible for the wealth

of Thai People? - A good sign(?), the former French President Monsieur Sarkozy will go to prison.

 

Very often tired of ThaiVisa:

 

or

 

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Edited March 1, 2021 by Yom