The Sewage Question in California Report of the State Engineer Wm Ham Hall

Cover The Sewage Question in California Report of the State Engineer Wm Ham Hall
The Sewage Question in California Report of the State Engineer Wm Ham Hall
California Dept of Engineering
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Chemical changes take place too "sometimes decomposition, sometimes putrefaction, sometimes simple "elective combinations. If sewage contain the germs of disease, "whatever they may be, no agency at present known, except a suffi- ^ciently high temperature, will efficiently destroy them. Excessive "dilution simply diminishes the chances of danger from any particular "tumblerfull. " Without attempting to be at all thorough, for the subject grows upon one's hands the further it is examined, I have... endeavored to show in this part of my report, by citing the opinions and conclusions of those who have looked into the subject in a thorough manner : That house and town sewage is a noxious matter capable of imparting or causing the most deadly diseases when taken into the system in very moderate quantities even ; That deposited in a river, estuary, or other body of water (except the sea, perhaps), it is not deprived of its noxious qualities it is not destroyed, but dihitcd; That streams so polluted do not "purify themselves, " that the sewage is not "carried away" even, but that the solid 27 matters of the sewage settle to the bottom and there poison the soil of the channel bed and banks, and that much animal organic matter (supposed to be the germs of disease, or asso- ciated with such germs, or capable of evolving them, or of producing conditions under which disease is evolved, it matters not which), is held in solution in the water and is only very slowly destroyed ; And, hence, that any pollution of a stream by sewage matter is a material pollution ; That public opinion is being formed to these conclusions in older countries, but that the question is lulled to rest there and hushed up, and the reform in sewage disposal is only gradually progressing, because of the great outlay in works of sewerage already constructed having river outfalls, the consequent great expense to change the systems, and the immense moneyed interests in other ways arrayed from selfish motives against the reform; And, finally, that any authority undertaking to dispose of sewage by depositing it in a stream, even one whose waters are but occasionally used and by a small number of people only, are assuming a responsibility or committing an act for which they may, in the near future, and certainly will, before many years go by, in some form, be held accountable, at least, as having erred.

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