Cedar River IA 02-CED-468

Assessment Comments

Assessment is based on results of IDNR ambient city monitoring and fish tissue (RAFT) monitoring.

Basis for Assessment

Based on 1994 & 95 monitoring results for USGS NASQAN site at U.S.  Hwy 20 bridge at Cedar Falls (site soon to be discontinued).   Levels of fecal coliform exceeded Class A WQC in one of 4 valid samples collected in summers of 94 and 95.   Due to lack of complete data (i.e., monthly or more frequent), use BPJ to assess support of primary contact recreation as PS.   Whole- fish carp samples collected upstream from CF/WLoo for 95 RAFT had all contaminants < 1/2 FDA action levels; samples dstr CF/Wloo had chlordane = 1/2 FDA levels; thus, assess fish consumption uses as FST.   No violations of Class B WQ criteria during 1994 & 95; thus assess aquatic life uses as FST, with threat being known impacts of agricultural and urban nonpoint sources.  Agricultural and urbans NPSP was identified as source of high levels of bacteria.