Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School

Civil Engineering


Introduction: While it is universally recognized that there is a difference between good and bad drinking water, few realize how important a part water plays in producing or destroying health. Comparatively recent investigation has shown that water forms the most active agent in the production as well as the promotion and spread of disease. Water containing organic impurities will, when used, because various forms of disease, while if the water of a well which has received the excreta of a patient suffering from some infectious disease, be drunk, the drinker is almost sure to contract the disease. Pure water may be said not to exist, and the term is only a relative one, meaning water which contains so little more than the theoretical “H2O” that it may be considered as pure. Any matter, therefore, which may be discovered in water, outside of the elementary Oxygen and Hydrogen, may be designated as an impurity. The character of the impurities differs necessarily with the source of the water. In water, form mineral springs and deep bored wells the impurities are generally entirely mineral in nature. Such water may be said to be per iodide of mercury just commonly to be formed. The solution is then left for about 20 hours and 160 grammes of caustic potash added, after which it is rendered more sensitive by the addition of more mercuric chloride and diluted up to one liter. (See more in text)

Library of Congress Subject Headings

Water supply -- South Dakota -- Brookings



Number of Pages



South Dakota State College


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