Effluents 



laboratories, p. 92 



marine and estuarine, p. 37 



oil refinery, p. 46 



titanium, p. 76 

 Electric power industry 



industrial water, p. 188, 188 



water consumption, p. 188 

 Endosulfan 



toxicity, p. 37, 83 

 Endothall Na and K salts 



irrigation water, p. 159 

 Endrin 



toxicity, p. 37, 83 

 Entamoeba coli 



irrigation water, p. 161 

 Enteric cytopathic human orphan viruses 



see ECHO viruses 

 Epilimnion 



water temperature, p. 43 

 ESP see Exchangeable sodium percentage 

 Estuaries 



floating materials, p. 76 



pesticides, p. 82 



plant nutrients and nuisance organisms, p. 77-80 



sediments, p. 76 



water pollution sources, p. 67 

 Estuarine organisms see Marine and estuarine organisms 

 Euglena 



chemical composition, p. 55 

 European Inland Fisheries Advisory Commission 



sediments, p. 47 

 Eutrophication 



nutrients, p. 51 

 Evapotranspiration 



humid areas, p. 173 



plant growth, p. 148 



saline soils, p. 148 



soil water movement, p. 145, 148 

 Exchangeable sodium percentage soils, p. 164 

 Eye irritation 



swimming, p. 15 



Farm ponds 



farmstead water sources, p. 121 



water quality, p. 122 

 Farms 



domestic water, p. 1 19 

 Farmstead water sources 



farm ponds, p. 121 



groundwater, p. 122 



precipitation (atmospheric), p. 121 

 Farmstead water supplies 



bacteria, nonpathogenic, p. 123 



carbon chloroform extractable substances, p. 124 



chlorinated hydrocarbon pesticides, p. 125 



chlorination, p. 127 



coliforms, p. 125 



color, p. 116, 124 



copper, p. 123 



dairy sanitation requirements, p. 120, 121 



dissolved solids, p. 116, 124 



domestic water, p. 119 



hardness (water), p. 121, 122 



hydrogen ion concentration, p. 124 



iron, p. 123 



manganese, p. 123 



microorganisms, p. 116, 125 



odor, p. 124 



organic pesticides concentration, p. 116, 124 



Farmstead water supplies (Cont'd) 



psychrophilic bacteria, p. 123 



radioisotopes, p. 116, 125 



taste, p. 116, 124 



trace elements, p. 116, 125, 725 



turbidity, p. i7(5, 121 



water analysis, p. 126 



water pollution sources, p. 122 



water quality, p. 113 



water quality control, p. 114, 126 



water quality criteria, p. 116 



water sources, p. 121 



water treatment, p. 121, 122, 127 

 Farm wastes 



biochemical oxygen demand, p. 132 

 Fasciola hepatica 



irrigation water, p. 162 

 Fecal coliform monitoring criteria 



secondary contact recreation waters, p. 9, 10 



surface waters, p. 3, 9, 12 

 Fecal coliforms 



animal wastes, p. 12 



Phelps Index, p. 22 



primary contact recreation waters, p. 4, 12, 13 



public water supplies, p. 20, 21, 22 



secondary contact recreation waters, p. 8, 9, 10 



see also Coliforms 

 Fecal streptococci 



animal wastes, p. 12 

 Federal Radiation Council 



Radiation Protection Guides, p. 51 

 Federal Water Pollution Control Act 



Water Quality Act of 1965, p. vi, 6 

 Fenoc 



irrigation water, p. 159 

 Fenthion 



toxicity, p. 37 

 Fiber scouring — textiles 



water quality, p. 196 

 Field crops 



salt tolerance, p. 149, 150 

 Filtration 



water purification, p. 128 



water treatment, p. 18 

 Fish 



bioindicators, p. 115 



stock water, p. 131, 131 



see also Anadromous fish; Catadromous fish; Cold 

 water fish; Fresh water fish; Warm water fish 

 Fishing 



recreation, p. 8 

 Fish migration 



water temperature, p. 69 

 Fish reproduction 



dissolved oxygen, p. 43 

 Fish and wildlife see Wildlife 

 Flavor see Taste 

 Floating materials 



aquatic life, p. 48 



estuaries, p. 76 



exclusion from streams and lakes, p. 48 



sea water, p. 76 



spawning, p. 48 

 Floating plants 



navigational threat, p. 53 



nuisance growth, p. 52 



nutrients, p. 52 

 Flukes 



animal parasites, p. 141, 142 



221 



