The report presents statistical data for the construction of sewage treatment plants and other sewerage projects as determined from construction contracts awarded during the year 1955 by the Nation's municipalities. Although the number and cost of the contract awards does not represent actual construction put-in-place, it does provide a comparison from year to year of progress made in providing treatment facilities necessary to lower the backlog of needed construction, to replace obsolete facilities, and to satisfy the requirements of increasing urban population. (Author)