The Problems of Stream Pollution

Issue 8 and Volume 72.

The Problems of Stream Pollution To those cities which take their water supplies from rivers into, which is discharged the sewage of municipalities above them the problem of stream pollution is a vital one. One of the most important of these questions is to what extent, if any, natural purification enters into the matter. Do the streams sufficiently purify themselves in the flow downward to render the water safe for potable purpose and if so how far from the source of pollution does this action take place? Is this natural purification sufficiently potent to enable the city taking its supply from the river to do so safely without artificial purification through filtration, sterilization or both? These questions are being investigated in a series of experiments by the bureau of public health service of the United States Treasury department in the Illinois River, which takes the sewage of Chicago and several…

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