摘要：To know the water quality characteristics of Tehran subterranean canals, from 20 Feb. 1978 to 23 Sept. 1978, samples were taken from 23 of them by simple random sampling without replacement, and were analyzed according to the 14th edition of Standards Method for the Examination of Water and Waste Water 1975. Arithmetic average concentration of water analyses of 23 subterranean canals were drawn on a logarithmic chart. The results of the analyses of samples showed that the quality of water from those subterranean canals should be categorized in Sulfated Classic Group.
