[Data from Tetra Tech, 1988; some data from Farm Chemicals Handbook, 1994, and Davis, 1993; I = Insecticide; Fu = Fungicide; H = Herbicide; Ac = Acaricide (kills mites, ticks); M = Molluscicide (kills snails); SS = Soil Sterilant; Y, yes; N, no; lb/yr, pounds per year; --, not analyzed; >, less than] Estimated amount Pesticide applied Detected in (Example (thousands Pesticide surface water, trade name) of lbs/yr) use bed sediment? ________________________________________________________________________ Primarily Nonurban ------------------- 2,4-D >200 H Y, N Prometon (Pramitol) 101-200 H,SS Y, N Diazinon 51-100 I Y, Y Simazine (Princep) 51-100 H Y, N Dicamba (Banvel) 51-100 H Y, Y Trichlopyr (Garlon) 51-100 H Y, N Atrazine (AAtrex) 21-50 H Y, N Bromacil (Hyvar) 21-50 H Y, N Carbaryl (Sevin) 21-50 I N, N Diuron (Karmex) 21-50 H Y, N Tebuthiuron (Spike) 21-50 H N, N Mixed Urban and Agriculture --------------------------- Malathion >200 I, Ac Y, N Methyl bromide(Celfume) 101-200 I, Ac, Fu --, -- Sulfuryl fluoride 101-200 I, Ac --, -- (Vikane) Chlorpyrifos (Lorsban) 21-50 I N, N Glyphosate (Roundup) 21-50 H Y, N Metaldehyde (Metason) 21-50 M --, -- Sulfur (Sulphotox) 21-50 Fu --, --