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upr000218-029
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    Mr. Wm. Reinhardt: W M . R. JUN 1 C Mr. E. E. Bennett ( Mr. R. L. Adamson It has been our practice for a number of years to submit to the local office of the State Board of Health a number of water samples each week selected from scattered locations throughout the city, for bacteriolog­ical analysis. These have uniformly come back 100$ with the exception of a rare instance now and then where con­tamination was traced to the faucet or spigot from which the sample was taken and which cleared up after the out­let was flamed. However the routine samples submitted the forepart of May showed unfavorable reaction on the North Side and the East Stewart district in four lo­cations indicating possible contamination of the water main. As soon as we were advised of thi3 result by the Board of Health we immediately obtained the chlorinating machine (temporarily out of service from the open spring) and commenced dosing chlorine into the Ogden Street transmission main from which the North Side receives its water supply and hence into the rest of the system. This operation was continued for four days and nights and tests were made at the extreme ends of the system with the residual indicator to determine that the chlorine was getting thru in the proper amounts. At the end of this time the line was thoroughly flushed and new samples resubmitted from the same locations and analysis developed the contamination had cleared up. We thoroughly discussed the matter with the Board of Health and the City Engineer in an effort to determine the cause as Dr. Carr stated we would be subject to law suits if people became ill and charged the cause to the water. He thought the cause might have been due to the close proximity of sewer mains and water mains in locations where they crossed over each other, but this does not appear to be likely as long as the water mains are under pressure, and if this were the cause it appears pro­bable that it would have shown up before now. In an effort to determine the cause Dr. Carr suggested that we obtain j f l W * — V — ^ s-/3 ,/rc w r m . j. may si 1950