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,I I, I , I Dependability of quality I Obtaining better quality water for domestic and stock purposes is the principal interest of those Morgan County residents looking for new supplies. For most of those within the proposed water district, quantity of supply has not been a problem. I The quality of water is normally expressed in terms of bacteriological, physical, chemical and radioactivity characteristics, The bacteriological quality of ground water in the aquiferp under study is not given considera- tion herein. With proper well construction and chlorination, the bacteriolo- gical quality poses little problem. Likewise, offensive physical charac- teristics are not expected such as color, odor or turbidity. No measure- ments of radioactivity have been made, but no experience of excessive radioactivity in the area is known. I I I I The chemical quality of the ground water is of interest, however. The chemical constituents found in ground water are the result of the dissolution of materials within the aquifer, plus addition of chemicals by man through farming or other activities. The U. S. Public Health Service and the Colorado Department of Health have established chemical standards for drinking water. Recommended maximum limits of particular chemical con- stituents set forth by the Colorado Department of Health for public water suppies are as follows: I I I Substance Concentration in mg/l* I I Alkyl Benzene Sulfonate (ABS) Arsenic (As)- - Chloride (Cl) - - - - Copper (Cu) - - - - - Carbon Chloroform Extract (CCE) Cyanide (CN)- - - - - - - Iron (Fe) - - - - Magnesium - - - - - }mnganese (Mn)- - - - - Nitrate (N03)- Phenols - - - - - - - Sulphate (S04)- - - - - - Total Dissolved Solids- Zinc (Zn) - - - - - - - 0.5 0.01 250 1.0 0.2 0.01 0.3 125 0.05 45 0.001 250 500 5 I I I I I *Milligrams per liter equals parts per million, as used elsewhere in this report. - 4 - M. W, BITTINGER AND ASSOCIATES, INC.