Cooling water (Cont'd) 



water consumption, p. 192, 193 



water properties, p. 759, 194 



water purification, p. 193 



water quality, p. 191, 194 



water softening, p. 193 



water treatment, p. 193 

 Copper 



farmstead water supplies, p. 123 



phytotoxicity, p. 153 



tainting substances, p. 77 



toxicity — fresh water, p. 60 



toxicity — sea water, p. 87 

 Copper compounds 



sulfate concentration — irrigation water, p. 158 

 Coumaphos 



toxicity, p. 37 

 Crop injury levels of herbicides 



irrigation water, p. 118 

 Crops 



irrigation effects, p. 144 



salt tolerance, p. 148, 150 

 Crude oil see Oil 

 Crustaceans 



pesticides, p. 82 

 Currents 



aquatic life, p. 35 



marine and estuarine organisms, p. 35, 68 

 Currituck Sound, N.C. 



silts, p. 96 

 Cyanides 



fresh water bioassay, p. 65 



toxicity — fresh water, p. 65 



toxicity — sea water, p. 88 

 Cyanophyta 



livestock poisoning, p. 137 

 Cyclops 



Nematodes, p. 142 



2,4-D 



irrigation water, p. 157, 159 

 Dairy products 



water quality for cooling, p. 120 

 Dairy sanitation requirements 



conforms, p. 125, 126 



farmstead water supplies, p. 116, 120, 121 



hydrogen ion concentration, p. 124 



Pasteurized Milk Ordinance, USPHS, p. 120 



water quality criteria, p. 120, 121 

 Dalapon 



irrigation water, p. 158 

 Daphnia magna 



pH, p. 41,61,62, 64 

 Daphnia pulex, 61, 62, 64 

 DDT 



irrigation water, p. 156 



residues and wildlife, p. 97 



toxicity, p. 37, 83 

 Deep wells 



irrigation wells, p. 113 

 Definitions see Glossary 

 Defoliants 



fresh water recommendation, p. 63 



median tolerance limit, p. 64 

 Degradables see Alkylbenzene 



sulfonates; Linear alkylate sulfonates 

 Demineralization 



boiler feed water, p. 193 



cooling water, p. 193 



water treatment, p. 206 



Detergents 



permissible levels, p. 37 



toxicity, p. 65, 88 

 Dichlobenil 



irrigation water, p. 159 

 Dieldrin 



toxicity, p. 37, 83 

 Dimethylamines 



irrigation water, p. 159 

 Diquat 



irrigation water, p. 158 

 Diseases see Animal diseases 

 Dissolved oxygen 



botulism, p. 93 



cold water fish, p. 33, 43, 44 



color, p. 48 



fish reproduction, p. 43 



fresh water, p. 33 



hypolimnion, p. 33, 44 



irrigation water, p. 118 



lakes, p. 44 



marine and estuarine organisms, p. 36, 70 



public water supplies, p. 23 



recommendations, p. 44 



reduction effects, p. 43 



requirements by category, p. 43 



salmonids, p. 44 



streams, p. 44 



tolerance variables, p. 44 



warm water fish, p. 33, 43, 44 



waterfowl, p. 93 



wildlife, p. 38 

 Dissolved solids 



Arkansas River Basin, p. 168 



bioassay, p. 40 



California river systems, p. 168 



Colorado River Basin, ■p. 168 



Columbia River Basin, p. 168 



concentrations, p. 39 



farmstead water supplies, p. 116, 124 



fresh water, p. 39, 40 



Gulf of Mexico Western Basins, p. 168 



Pecos River Basin, p. 168 



Platte River, p. 168 



Red River Basin, p. 168 



Rio Grande, p. 168 



stock water, ■p. 117 



toxicity synergism, p. 40 



Upper Missouri River Basin, p. 168 

 Diuron 



irrigation water, p. 158 

 DO see Dissolved oxygen 

 Domestic water 



farms, p. 119 



farmstead water supplies, p. 119 



water quality, p. 119 

 Dranunculus 



nematodes, p. 142 

 Drinking Water Standards— USPHS, p. 119, 163 



methylene blue active substances, p. 25 



public water supplies, p. 19, 20, 21, 22, 23 



radioisotopes, p. 50 



treatment facilities, p. 19 

 Dursban 



toxicity, p. 37 



ECHO viruses 



water pollution sources, p. 141 

 Ecosystems 



benthic flora, p. 54 



220 



