Assessment Comments

Segment now considered "not assessed" due to lack of recent monitoring information.

Basis for Assessment

SUMMARY:  The Class A1 (primary contact recreation) uses and the Class B(WW1) aquatic life uses remain "not assessed" (IR 3a) due to lack of recent water quality information upon which to base these assessments.   Fish consumption uses are also now considered “not assessed” due to the age of the data (>10 years) upon which the previous assessments were based.   This assessment is also used for the adjacent upriver segment (IA 04-RAC-0030-2).  

EXPLANATION:  Routine water quality monitoring is not conducted in this river segment; thus, data upon which to base assessments of the Class A1 and/or Class B(WW1) uses are not available.  

Fish consumption uses are now considered “not assessed” due to the lack of recent fish contaminant monitoring in this assessment segment.   Previous assessments of support of the fish consumption uses (“fully supporting”) were based on results of U.S.EPA/IDNR fish contaminant (RAFT) monitoring near Adel in 2000.   The composite samples of fillets from channel catfish had low levels of contaminants.   Because the data upon which these assessment were based are now more than ten years old, the Class HH/fish consumption uses are now considered “not assessed.”  As water quality data age, they are less able to represent current water quality conditions.   As data age beyond ten years, their ability to represent current water quality conditions is increasing suspect.