Over the past few months we've been running a pilot with air quality sensors placed inside BT InLink stands. These sensors capture and send data every minute. This data is a snapshot of the real time data.

• Nitrogen Dioxide - PPB
• Carbon Monoxide - PPM
• Relative Humidity
• Temperature

DEFRA data is normally in ug /m3, the formulae to go from PPB to ug. It is temperature dependant but a rough approximation of conversion is times the PPB by the factor below to get ug/m3 (see link below for more details).
*1.88 at 25 degrees C
*1.95 at 15 degrees C
*1.98 at 10 degrees C
*2.02 at 5 degrees C

Address	Postcode	Latitude	Longitude
Bridge Street (junction Norfolk Gardens)	BD1 1JY	53.7926	-1.7522
Manchester Road (junction Newall Street)	BD5 7QA	53.7817	-1.7589
Chester Street (junction Morley Street)	BD7 1BE	53.7909	-1.7591
Godwin Street (junction Westgate)	BD1 1QT	53.7947	-1.7562
St. Thomass Road (junction Westgate)	BD1 2RW	53.7970	-1.7612

CSV's hold current data for the last 30 days and this is updated daily to keep the last 30 days cycle and Zip files hold historic data for Air Quality Monitoring.
Update 10th Jan 2020 - The devices are being returned to the factory for an upgrade, as a result there may be gaps in available data for the next few weeks.

9 Resources ...  csv  link  html

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