§ Mrs. Kellett-Bowmanasked the Secretary of State for the Environment by how many and by what proportion the number of authorities discharging untreated sewage into water courses or estuaries has diminished since June, 1970; and how this compares with the previous two years.
§ Mr. Graham PageThe report on the River Pollution Survey, 1970, contains information about numbers of discharges (rather than of local authorities). Arrangements are being made to bring this information up to date as at the beginning of 1972 and I will publish the results. No comparable information is available for 1968.
§ Mrs. Kellett-Bowmanasked the Secre-of State for the Environment to what extent atmospheric pollution at ground level has decreased during the past 10 years and the past two years, respectively.
§ Mr. Eldon GriffithsThe average ground-level concentration of smoke in United Kingdom during 1970–71 was 19.7 per cent. lower than that for 1968–69 and 58.4 per cent. lower than for 1960–61. The equivalent figures for sulphur dioxide are 10.8 per cent. and 26.7 per cent.