Albia City Reservoir IA 04-LDM-1047

Assessment Comments

Basis for Assessment

Lake was sampled near inflow and near dam on Feb 9, 1993 for seven ag herbicides in water and sediment.   Levels of atrazine and cyanazine were detected in water, and levels of atrazine were below the MCL.   Levels of cyanazine (0.96 ug/l near inlet and 1.0 ug/l near dam) were relatively high compared to the other reservoirs.   No herbicides were detected in sediment.  The levels of atrazine and cyanazine in the Albia Reservoir were greater than levels in the two lakes known to have high levels of ag herbicides in summer:  West Lake Osceola and Corydon Res (see West Lake file from Agena and Kalkhoff 1993).   Although the evidence is circumstantial, the results of winter sampling suggest the strong possiblity of high levels of these pesticides in the Albia Reservoir during summer.   Additional monitoring is needed at Iowa's water supply reservoirs to accurately assess levels of pesticides.