Ingesting water requirements

Yesterday’s This Day in Water Historical past had this quote from the AWWA’s Water High quality and Remedy (third ed., 1971) (most feedback eliminated):

“On October 21, 1914, pursuant to the advice of the Surgeon Common of the Public Well being Service, the Treasury Division adopted the primary requirements for ingesting water equipped to the general public by any widespread service engaged in interstate commerce. These requirements specified the utmost permissible limits of bacteriological impurity, which can be summarized as follows:

  1. The bacterial plate rely on commonplace agar incubated for 24 [hours] at 37 C was to not exceed 100/cc.
  2. No more than one of many 5 10-cc parts of every pattern examined was to indicate presence of B. coli.
  3. The really useful procedures had been these in Commonplace Strategies of Water Evaluation (APHA, 1912).

These requirements had been drafted by a fee of 15 appointed members. Among the many members of this fee had been Charles Gilman Hyde, Milton J. Rosenau, William T. Sedgwick, George C. Whipple and C.-E. A. Winslow, names well-known to those that have studied early developments in water remedy.

Although not part of the requirements, the accompanying first progress report may be very fascinating because it gives perception into the fee’s deliberations on different issues. There seems to have been appreciable dialogue on whether or not the requirements also needs to state that the water shall ‘be free from injurious results upon the human physique and free from offensiveness to the sense of sight, style, or scent’; whether or not the standard of water required needs to be obtainable by the widespread carriers with out prohibitive expense; and whether or not it will be essential to require greater than a ‘few and easy examinations to find out the standard of ingesting water.’”

US Public Well being Service Hygienic Laboratory, c. 1930

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