§ Mr. Ellis Smithasked the Parliamentary Secretary for Science if he will publish in the Official Report in tabular form the amount of air pollution in the two years prior to the coming into operation of the Clean Air Act, and in the
TABLE 1 ANNUAL AVERAGE CONCENTRATIONS OF SMOKE AND SULPHUR DIOXIDE AS MEASURED BY THE VOLUMETRIC METHOD EXPRESSED IN MICROGRAMMES PER CUBIC METRE — Year ending 31st March 1956 1957 1961 1962 Smoke Sulphur Dioxide Smoke Sulphur Dioxide Smoke Sulphur Dioxide Smoke Sulphur Dioxide SALFORD: Regent Road 520 486 480 400 504 415 507 459 Notes: 1. Measurements of smoke and sulphur dioxide by the volumetric method were started for the first time in Irlam, Stoke-on-Trent and Trafford Park after the Clean Air Act came into force. 2. No measurements of smoke and sulphur dioxide are made at Ambergate, Peak Forest or Whatst andwell. 3. The figures show the level of pollution at the site concerned, and are not necessarily representative of conditions over the town generally.
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TABLE 2 ANNUAL AVERAGE OF UNDISSOLVED MATTER COLLECTED BY THE BRITISH STANDARD DEPOSIT GAUGE EXPRESSED IN MILLIGRAMMES PER SQUARE METRE PER DAY — Year ending 31st March 1956 1957 1961 1962 STOKE-ON-TRENT: Sewage Works, Leek Road … … … 154 — 105 115 Brownhills High School, Tunstall … … 141 — 133 — Westcliffe Hospital, Tunstall … … — 109 95 78 Cobridge Park, Burslem … … … — 178 150 144 Thistley Hough High School, Stoke … — 68 60 — Notes: 1. There are no sites in Irlam, Salford or Trafford Park at which deposit gauge measurements have been made for complete years both before and after the Clean Air Act during the years concerned in the Question. 2. No deposit gauge measurements are made at Ambergate, Peak Forest or Whatstandwell. 3. The figures show the level of pollution at the sites concerned, and are not necessarily representative of conditions over the town generally. latest two years in Stoke-on-Trent, Sal-ford, Trafford Park, Irlam, Whatstandwell, Ambergate, and Peak Forest, respectively.
§ Mr. Denzil FreethThe following tables give this information in repect of those named sites where measurements have been made for a complete year, both during the two year period ending 31st March, 1957 (i.e. that preceding the Clean Air Act 1956) and during the two year period ending 31st March, 1962 (i.e. the most recent for which the data are available).
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§ Mr. Ellis Smithasked the Parliamentary Secretary for Science if he will have special observations and measurements taken by day and night of air pollution in Trafford Park, Ambergate, Peak Forest and Chatterley.
§ Mr. Denzil FreethNo. Measurements are made by the Warren Spring Laboratory of the Department of Scientific and Industrial Research for research purposes and normally by local authorities for local control purposes and for the national survey of air pollution. They are not usually made separately by day and by night. Daily measurements of smoke and sulphur dioxide and monthly measurements of grit and dust fall are being made by local authorities in the Trafford Park area. No measurements are at present being made at Ambergate, Peak Forest or Chatterley. I am not aware of special circumstances requiring extension of existing arrangements.
§ Mr. Ellis Smithasked the Parliamentary Secretary for Science if he will take measurements of air pollution by day and night in areas within North Staffordshire, where old firing methods for all purposes in manufacturing are still used.
§ Mr. Denzil FreethNo. Separate measurements are not usually made by day and by night. Daily measurements of smoke and sulphur dioxide are at present being made by the local authorities, as part of the national survey of air pollution, in the following places in North Staffordshire—Leek, Biddulph, Newcastle-under-Lyme, Stoke-on-Trent and Stafford. I am not aware of any circumstances requiring extension of these arrangements but I would, of course, be glad to consider the need for taking measurements at any specific locations the hon. Member may care to bring to my notice.