Cost information for water supply and sewage disposal

This report presents the results of a study to produce cost functions suitable for preparing reliable estimates for national and regional planning purposes. It is hoped that many of the results will prove useful also for the selection of alternative processes, for testing engineers' estimates and in identifying research priorities.
The report is in four parts. Part I provides the background to the study, states the objectives, describes the general approach and discusses the applicability of the results. Part II offers a more detailed account of the model-building approach, and provides an introduction to the statistical techniques used in developing the cost functions. Part III contains the detailed set of results, together with typical performance relationships where these are necessary. Finally, those cost functions of most pertinence to national planning are summarized as a Users' Digest in Part IV.