§ Mr. SheermanTo ask the Secretary of State for the Environment whether he will list in rank order the water companies with the highest level of purity and lowest level of contamination of the drinking water they supply.
§ Mr. BaldryBecause of the number and diversity of the parameters used in regulating the quality of drinking water, and also because some companies supply water from a number of different sources, it would not be possible to rank companies in the way suggested.