The automatic monitoring stations provide hourly data on nitrogen dioxide (NO2) and particulate matter (PM10 and where available smaller PM2.5 particles) levels in the air. This short-term data is collected for the purpose of the Local Air Quality Management Area, not the Greater Manchester Clean Air Plan. By clicking on the monitoring stations below you can see provisional results from the previous 24 hours.
Daily air quality index
This displays the Daily Air Quality Index (DAQI) which is numbered 1-10 and divided into four bands, low (1) to very high (10), to indicate immediate short-term air pollution levels in a simple way, similar to the sun index or pollen index.
While these are not linked to legal limits it can help to show whether you are likely to be at risk from air pollution on that particular day. It also recommends what you can do and gives health advice to consider over the next few hours or days.
The DAQI doesn’t take into account the cumulative effect of long-term exposure to air pollution over months and years which may contribute to chronic health conditions – similar to smoking.
Air pollution is above legal annual average limits in some areas of our region. As a result, government has instructed Greater Manchester to produce and implement a Clean Air Plan to address the harmful effects of long-term exposure to NO2 pollution.
There is separate long-term monitoring of annual average levels of NO2 air pollution for the purposes of the Greater Manchester Clean Air Plan.
Information on the data measured at these Automatic Monitoring Stations for comparison with the legal air quality standards and objectives is included in the Greater Manchester Air Quality Annual Status Report.