Prepared by Engineering Division Health Branch Department of Health Services and Hospital Insurance
Completed February 10, 1965
From the Preamble:
"On April 1st, 1961, the Pollution Control Board assumed jurisdiction over the watershed area of the Columbia River in Canada. This comprises the drainage basins of the Columbia itself, plus the various tributaries: Similkameeen, Okanagan, Kettle, Pend d'Oreille, Kooetenay, Moyie and Flathead...
To obtain a general picture of conditions a limited sampling program was introduced on the principal Kooteney-Columbia chain. The purpose of this report is to give the results of this survey together with any other relevant information. It is limited to the Kooteney Basin and the Columbia River proper with emphasis on the lower reaches of the Arrow Lakes to the international boundary."
See the Report [PDF]. Note: scanned copy of original document.