Irrigation water (Cont'd) 



sewage bacteria, p. 162 



Silvex, p. ]59 



sodium adsorption ratio, p. 1 15 



suspended load, p. 118, 163, 166, 171 



2,4,5-T, p. 157 



trace elements, p. 117 



trace element tolerances, p. 152 



tuberculosis bacilli, p. 162 



viruses, p. 162 



water management (applied), p. 113, 176, 177 



water pollution, p. 163 



water quality control, p. 145, 176 



water quality criteria, p. 115, 145, 146 



water temperature, p. 118, 157 



water treatment, p. 176 



xylene, p. 158 

 Irrigation water quality 



humid areas, p. 172 



humid climates, p. 171 



salinity, p. 170 



total dissolved solids, p. 170 

 Irrigation wells 



deep wells, p. 113 



Jackson turbidity units, p. 46 

 turbidity, p. 21 



Kraft and sulfite wastes see Pulp wastes 



Lacrimal fluid see Tears 

 Laboratories 



effluents, p. 92 



waste water (pollution), p. 91 

 Lakes 



algae chemical composition, p. 55 



dissolved oxygen, p. 44 



floating materials exclusion, p. 48 



iron, manganese and phosphorus levels, p. 34 



nuisance growth prevention, p. 34 



sediments, p. 47 



turbidity, p. 47 



water temperature, p. 43 

 Land and Water Conservation Fund Act of 1965, p. 

 Langelier index 



permeability, p. 170, 171 

 LAS see Linear alkylate sulfonates 

 Leaching 



fraction formulae, p. 169 



irrigation practices, p. 169 



irrigation water, p. 169 

 Lead 



phytotoxicity, p. 154 



poisoning — waterfowl, p. 18 



toxicity — sea water, p. 88 

 Leather industry 



water consumption, p. 188 



water properties, p. 213 



water quality requirements, p. 213 



water treatment, p. 213 



water utilization, p. 213 

 Lepomis machrochirus 



oil toxicity, p. 46 

 Leptospira canicola, p. 140 

 Leptospira pomona, p. 140 

 Leptospirosis, p. 139, 140 

 Light intensity 



color, p. 48 

 Light penetration 



aquatic plants, p. 96 



Light penetration (Cont'd) 



fresh water, p. 34 



photosynthetic production of oxygen, p. 48 



turbidity, p. 47 



wildlife, p. 38, 96 

 Lindane 



toxicity, p. 37, 83 

 Linear alkylate sulfonates 



fresh water, p. 35 



median tolerance limit, p. 63 



toxicity, p. 63 

 Lithium 



phytotoxicity, p. 154 

 Livestock 



animal parasites, p. 141 



arsenic toxic dose ranges, p. 135 



saline water tolerance, p. 133, 134 



water pollution effects, p. 132, 133 



see also Stock water 

 Livestock water see Stock water 

 Lower Colorado River 



salinity, p. 96 

 Lumbering 



industrial water, p. 187 



surface waters, p. 197 



water consumption, p. 188 



water quality, p. 197, 797 



water utilization, p. 197 

 Lyngbya 



chemical composition, p. 55 



Manganese 



farmstead water supplies, p. 123 



lake hypolimnion limits, p. 34 



phytotoxicity, p. 154 



water purification, p. 128 

 Marine animals see Marine and estuarine organisms 

 Marine and estuarine organisms 



carbon dioxide, p. 68 



color, p. 75 



currents, p. 35, 68 



dissolved oxygen, p. 36, 70 



DO concentration recommendation, p. 70 



fish, p. 67, 69, 77, 82 



floating materials, p. 76 



hydrogen ion concentration, p. 36, 68 



nuisance algae, p. 36, 79 



nutrients, p. 77-80 



oil, p. 36, 70-74 



pulp wastes, p. 89-91 



radioisotopes, p. 34, 36 



salinity, p. 35, 67 



sediments, p. 36, 76 



tainting prohibition, p. 36 



tainting substances, p. 77 



toxicity, p. 80 



turbidity, p. 36, 74 



waste water (pollution), p. 82-92 



water pollution, p. 67 



water quality p. 66-92 



water temperature, p. 35, 68-70 



see also Fish 

 Marine and estuarine waters 



recreation, p. 14 

 Marine fish see Fish; Marine and estuarine organisms 

 Marine microorganisms see Marine and estuarine organ- 

 isms 

 Marsh management 



waterfowl, p. 95 



224 



