. The sanitation of cities. BIRMINGHAM, ENGLAND Outfall of treated sewage from treatment plant. The treated sewage from this plant is greater in volume than the ordinary flow in the river into which it is discharged and is much purer supply? If on the other hand, it is asked towhat extent sewage should be treated, the answerinvolves a reply to the question—Will the efflu-ent by any means find its way into the source of awater supply? Obviously, if a source of supply is free from alldanger of sewage pollution, it need not be treatedto remove the danger of causing diseases whichcommonly arise fr
. The sanitation of cities. BIRMINGHAM, ENGLAND Outfall of treated sewage from treatment plant. The treated sewage from this plant is greater in volume than the ordinary flow in the river into which it is discharged and is much purer supply? If on the other hand, it is asked towhat extent sewage should be treated, the answerinvolves a reply to the question—Will the efflu-ent by any means find its way into the source of awater supply? Obviously, if a source of supply is free from alldanger of sewage pollution, it need not be treatedto remove the danger of causing diseases whichcommonly arise from this pollution. 25. so c < J3— H-Z o <u < < <; cd O -3c Z o CQ c r3 26 Mater Supply anb IRcmoval of Sewatje There are other reasons, however, on accountof which treatment may still be required—suchas hardness, discoloration, etc. It is no less evi-
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