| Coventry Centre -
Ozone Levels The graph below
shows the ozone level over the last week gathered by the DETR's automatic air pollution
monitoring station for Coventry based at Bablake
School.
The data is updated every hour and it is
given in the same units and time average periods that are used to define the National
Air Quality Standards.
Ozone is measured in Parts Per Billion
(ppb).
The standard set by the Government's
National Air Quality Standards (1997) is 50ppb as a running
8-hour average.
EU Directives on Air Quality set further
'marker levels':
|
MODERATE |
50 - 89 ppb
(hourly average) |
|
HIGH |
90 - 179 ppb
(hourly average) |
|
VERY HIGH |
180+ ppb (hourly
average) |
|
