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65
Atmospheric Pollution
Investigation into the atmospheric pollution in the City was continued
during the year at three sites, Mayfair, Pimlico and Charing Cross,
where deposit gauges, which measure the deposited pollution, and lead
peroxide cylinders, which measure the sulphur activity, are sited. The
following table gives the results of the monthly analyses, and shows
separately the amounts of insoluble and soluble constituents.
Monthly deposits of impurities—tons per square mile.
Month 1961 Mayfair. Pimlico. Charing Cross.
Insol. Sol. Total. Insol. Sol. Total. Insol. Sol. Total.
January 12.68 1187 24.55 25.77 11.44 37.21 4056 13.71 54.27
February 12.62 1026 2288 1846 866 27.12 2589 12.61 3850
March 9.95 9.89 19.84 No figures due to negligible rainfall
April 1340 6.24 1964 1953 8.36 27.89 20.74 1089 31.63
May 1398 12.72 26.70 14.93 12.42 27.35 13.44 979 2323
June 6.85 11.83 18.68 9.73 9.53 1926 9.53 8.72 18.25
July 8.69 18.69 27.38 11.58 11.14 22.72 11.11 15.50 26.61
August 6.64 5.08 11.72 9.73 7.25 16.98 10.22 5.71 15.93
September 8.08 8.59 16.67 10.57 9.97 20.54 12.11 10.49 22.60
October 11.35 15.17 26.52 10.97 15.40 2637 1859 18.72 3731
November 9.61 11.94 21.55 12.48 14.50 26.98 19.18 1424 33.42
December 12.38 18.00 30.38 16.91 24.93 41.84 20.18 25.09 45.27