Cambridge City Council has been awarded grant funding from Defra to purchase new equipment to monitor air quality in and around and the Mill Road area. This data is also been used to understand the impact of the Mill Road bridge closure over the course of the summer of 2019.

This open data release is linked to the monitoring of traffic and pedestrian counts around Mill Road. The traffic data can be accessed here: https://data.cambridgeshireinsight.org.uk/dataset/mill-road-closure-traffic-sensor-data

The data is available from the 08/07/2019 to 27/10/2019.

****Please note- Data for sensors 189245 and 292245 was unable to be extracted for the most recently release. This is being investigated****

The data in this release is broken down by hourly increments. 

Please note that this is the raw data without any verification / correction factors applied.

The data extracts are broken down by pollutent:

• NO2- Nitrogen Dioxide
• PM2.5:Particulate Matter 2.5
• PM10: Particulate Matter 10

Field Descriptions:

Serial Number_Pollutant_PreScaled- un-calibrated (prior to ratification)

Serial Number_Pollutant_Scaled- calibrated  (This is the raw data without any verification / correction factors applied.)

Serial Number_Pollutant_Unit- unit measurement

Serial Number_Pollutant_Slope- slope of the line used in linear regression to calibrate the monitor (not used in pre-scaled results)

Serial Number_Pollutant_Offset- – data offset of the line used in the linear regression to calibrate the monitor (not used in pre-scaled results)