§ Mr. CrowtherTo ask the Secretary of State for the Environment if he will publish in theOfficial Report a schedule showing the changes between 1987 and 1988 in the quality of rivers in the Yorkshire region, including the lengths over which improvement or deterioration has taken place.
§ Mr. Howard[holding answer 24 April 1989]: I understand that the lengths of rivers and canals recorded in each water quality class by the Yorkshire water authority were as follows:
658W
Freshwater quality class Kilometres 1987 1988 1A Good quality 2,264 2,261 1B Good quality 2,198 2,141 2 Fair quality 779 839 3 Poor quality 629 646 4 Bad quality 165 148 Total 6,035 6,035 These figures are not directly comparable with those obtained from the 1985 river quality survey of England and Wales as they are based on more limited surveys carried out by the water authority.