Data Selector

The Data Selector Tool allows you to access measurement data and simple statistics for the six sensors across South Tyneside.

Monitoring data and exceedance statistics:

Sensor data can be downloaded from the data selector tool by firstly selecting:

 - Measurement Parameters Group (Automatic Monitoring Data)

 - Mesaurement type (Measured data and simple statistics or Annual Exceedances & Statistics)

Then by selecting:

 - Pollutants

 - Measurement period

 - Measurement sites

Exceedance statistics

Exceedance statistics provide information about concentrations above a specific threshold value. The exact concentration and the metric used varies by pollutant and purpose. A selection of commonly used examples are :

 - UK Air Quality Objectives

 - EU Limit and Target Values 

 - Critical Loads

 - The health-effects based system of four bands and a 1-10 index

 - Indicators of Sustainable development - the average number of days per site on which pollution levels were above National Air Quality Standards

Data Verification and Ratification

Data Verification and Checking is carried out on an ongoing basis and is nominally a process to 'clean-up' the initial provisional data. Any corrections to the data made during the process are automatically uploaded (still as Provisional at this stage). There are also manual checks carried out by air quality monitoring experts on a daily basis. Data Ratification is a detailed manual check of the data set carried out on a quarterly basis for the South Tyneside sensor network by the full QA/QC process. 

Data ratification requires a longer-term view and the judgement of experienced air quality scientists who will have to consider the validity of data in the light of many factors. The ratifier reviews all calibration data, information from the analyser services and repairs and any other information available for the site or sensor over the whole ratification period. 

All data remain provisional and subject to further QA/QC checks until they have been fully ratified. Ratified data may differ from raw and provisional data. 

In addition, the results from the QA/QC co-location are incorporated to take account of any problems detected during the QA/QC process. Which ensures that ratified data are traceable to Uk national and international gas calibration standards. The co-location of the South Tyneside sensors are carried out annually. The verification and ratification process ensures the best possible accuracy of air quality daa for public information, and for scientific research purposes.