Air Quality testing - Near Old Post Office

 We have just received the air pollution monitor (Flow 2 from Plume Labs) and ran a couple of testing events.

On Bridge Street and the corner of Long Row:

11th May at 6:30 pm (Wind speed N.E. 6 mph  18.5C)

Recorded NO2 level average over 10 minutes: 144 ppb (276 ugm-3) 

Conversion using this tool: http://www.apis.ac.uk/unit-conversion

pm2.5 average 3.6 ugm-3

pm10 average 14 ugm-3

Note:

WHO NO2 limit 10 ug/m-3 annually

EPA NO2 one hourly limit  100ppb for NO2


On Bridge Street and the corner of Long Row: 12th May Noon

N02 level (Wind speed 4 mph SW) 64 ppb  (122 ugm-3)

pm2.5 average 4.5 ugm-3

pm10 average 40 ugm-3

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