§ Mr. Hardyasked the Secretary of State for the Environment if he will list those rivers which will remain grossly polluted in five years' time and the number of miles of these rivers which he expects to remain in this lowest category of wholesomeness at that time.
§ Mr. Eldon GriffithsVolume 2 of the River Pollution Survey, which is to be published by the end of the year, will list the rivers which are likely to remain grossly polluted in 1980, when the planned remedial works are expected to be completed. Estimates of the overall effects of the planned expenditure on improvement are in the appendix to circular 64/72 which I am sending the hon. Member. The mileage of grossly polluted non-tidal stretches of river is
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§ Mr. SpeedThe details in respect of trunk road schemes costing over £25,000 either in preparation or in the firm programme are as follows:
expected to be reduced by 80 per cent., from 952 miles in 1970 to 199 miles in 1980 when less than 1 per cent. of the total mileage would be grossly polluted. The grossly polluted tidal stretches of river would be cut by about 72 per cent., from 209 to 59 miles, leaving just over 3 per cent. grossly polluted.