§ Mr. Juddasked the Secretary of State for the Environment what action he is taking to ensure that smoke levels do not in future rise above 40 micro-grammes per cubic metre of air in any local authority area in England and Wales; whether he will list all those local authorities in whose area it has risen above 100 microgrammes, and on how many occasions in each of the past three years; and whether he will make a statement.
§ Mr. Eldon GriffithsIt would not be practicable, except at a disproportionately high cost, to establish on how many occasions each gauge operated by the 450 authorities which report their smoke levels has shown a reading in excess of 100 microgrammes per cubic metre during each of the past three years.