United States Geological Survey records of suspended and dissolved matter in surface‐waters

Although the widest‐known and most conspicuous task of the United States Geological Survey with reference to surface‐waters has been the measurement of discharge, attention has always been given to the suspended and dissolved matter carried in them. From 1902 to 1909 the Survey published about 20 reports on the quality of surface‐waters. These reports dealt largely with stream‐pollution and its prevention, subjects that have not been included in the work of the Geological Survey since the Public Health Service began investigations of them in 1913.