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Measurement of Air Pollution
Daily volumetric instruments for measuring smoke and sulphur dioxide in the air
and deposit gauges for monitoring local emissions were maintained in operation during
the year as indicated in tables 11, 12 and 13.
In July, the daily volumetric instruments at Acton Lane, W.3. and Friars Place
Lane, W.3. were taken out of commission. A fresh site at Northcote Avenue, Southall,
was brought into use in October.
The deposit gauges at Park Avenue and Hortus Road, Southall, were taken out of
commission in August.
The overall figures for the daily volumetric instruments show average reductions,
compared with last year, of 2% in the amount of smoke and 16% in the amount of
sulphur dioxide in the air.
The deposit gauge figures show an overall 45% reduction in solid deposit in the
air.
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