Recherche dans la collection - Plan showing pollution of lake shore and results of analyses. Toronto Water Works. Prepared by Chipman & power Engineers. J.G. Sing. Isham Randolph...Willis Chipman. [cartographic material]

A chart shows total bacteria counts and the occurance of positive "B" coli in the area of Lake Ontario near the city of Toronto. The various watersheds and the areas they occupy are also indicated. By 1891 the 5-inch steel intake pipe which supplied Toronto with water had developed a leak and a typoid epidemic developed. The same thing happened in 1895. Various inquiries and commissions were set up to investigate the problem of supplying Toronto with ample and pure drinking water. There was a suggestion to pipe in water from Lake Simcor. The other alternative was to sink a very long intake pipe or build a long intake tunnel from Lake Ontario to the City of Toronto Water Works facilities. The problem was still evident in 1911 and 1912. It was during these years that J.G. Sing (a signator of this map) was appointed Chairman of a commission of four engineers which was to investigate and report on the Toronto Water Works.
410/Ontario, Lake; 440/Toronto

The microfiche version is NMC4514