§ Sir Brandon Rhys Williams
asked the Secretary of State for the Environment if he will require the water authorities to publish figures indicating the revenue cost and the full cost of effluent treatment per unit of volume 31W at each of their works serving areas with a population of 5,000 or more; and if he will publish a table collating such information as is available.
§ Mr. Waldegrave
Water authorities publish performance ratios in their annual reports, including operating expenditure on sewage treatment per head of population. There are many individual works and their costs vary widely according to the treatment required and other factors. Properly comparable figures are not generally available.