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CLEAN AIR
The Smoke Control Officer reports:—
Last year I referred to the intense activity on Clean Air, and this has
continued during 1962.
The work can be divided into three main groups, i.e.
(a) Measurement of pollution.
(b) Control of Pollution—Smoke Control Areas, and
(c) Other activities, such as conferences and exhibitions.
(a) Measurement of Pollution
The department has continued measurement of pollution as part of
the National Survey by means of the two daily volumetric instruments,
one at Croft Lodge Close, Snakes Lane, Woodford Green, and the other
at Oakhall Court, Wanstead (within No. 3 Smoke Control Area). The
instrument at Croft Lodge Close is fitted with an eight port valve
which automatically changes every twenty-four hours, thus ensuring
complete records over week-ends and holiday periods. This device has
operated satisfactorily during the year, and it is hoped to provide a
similar valve for the instrument at Wanstead shortly.
Details of the average yearly figures for 1962 are given below, together
with the earlier years for comparison. The figures are expressed in
micrograms per cubic metre:—
Woodford (Croft Lodge Close)
Smoke Year 1955 1956 1957 1958 1959 1960 1961 1962
Average for year 190 180 170 190 130 113 98 126
Average for winter months 320 290 310 273 190 163 178 206
Average for summer months 60 70 50 65 43 63 44 45
Highest daily recording 1530 1120 2050 1080 1080 670 720 2392
Sulphur Dioxide
Year 1955 1956 1957 1958 1959 1960 1961 1962
Average for year 157 172 172 200 172 160 124 149
Average for winter months 229 257 266 245 283 222 195 221
Average for summer months 85 86 60 134 71 106 77 77
Highest daily recording 1086 1144 1973 1133 1856 984 652 2503
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