The graphs are based on:the 99.18 percentile of the daily mean SO2 concentrations (in μg/m3), corresponding to the
4th highest as defined by the daily limit value (left); and the 99.73 percentile of the SO2 hourly concentrations, corresponding
to the 25th highest as defined by the hourly limit value (right), for the various types of stations.
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Decrease your toilet’s water-use by dropping a hippo or other displacement device into the cistern. If you’re planning on buying a new toilet, consider a water efficient one with a dual flush.
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