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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