PM10 options are not shown when viewing on the web page

[Rob_Peterson]

All of a sudden my 4 sensors are not showing PM10 options - just the air quality standards around PM2.5 - has there been a software change to remove tis.

[Kieran (Kieran Berryman)]

Hi Rob,

The PM10 layers are still available. You can find µg/m3 values and the PM10 AQI in the “obsolete” sections of the data layer drop down if you scroll to the
bottom.

[Rob_Peterson]

Thanks for the quick response - I must have missed the communication about them being obsolete and the rationale behind that

[Kieran (Kieran Berryman)]

Hi @Rob_Peterson

They were moved to the newly created Obsolete categories in the map update that released last week. The “obsolete” status is based the the AQ-SPEC evaluations found here: air quality sensor summary reports

[Lance (Lance Arthur Wallace)]

Besides the AQ-SPEC results, there have been a large number of chamber studies finding that many of the low-cost monitors have trouble with measuring PM10. That was the reason that the ALT-CF3 algorithm was applied only to PM2.5. (aka “pm2.5” alt in the API database)

[Rob_Peterson]

Thanks, unfortunately, the PM10 is what I purchased the monitors for - a local authority has been relying on PM10 to measure air quality and I wanted to validate if they were measuring appropriately.