HC Deb 24 July 1973 vol 860 c366W
Mr. Hardy

asked the Secretary of State for the Environment which Yorkshire rivers have been upgraded in their pollution classification; and how many miles of river have been so upgraded in the last three years.

Mr. Eldon Griffiths

Since wide variations can and do occur between conditions in one stretch and another of a river, the 1970 river pollution survey classified each stretch of these rivers—as distinct from the river as a whole—according to its condition.

The survey of January 1972 shows that since 1970, 45 miles of river in the area of the Yorkshire River Authority have improved in quality and 20 miles have deteriorated. These changes have occurred over short, non-tidal stretches on 33 rivers.

A further report updating the survey to January 1973 is expected to be published early next year.

Forward to