Assessment Comments

Assessment is based on (1) results of a DNR biocriteria sampling in 1998 and (2) results IDNR ambient monitoring NE of Statford.

Basis for Assessment

SUMMARY:  The Class B(WW) aquatic life uses were assessed as "fully supported / threatened."  Fish consumption uses remain assessed as "fully supported."  EXPLANATION:  The assessment of support of the Class B(WW) uses developed for previous reports (see above) was based on results from the DNR quarterly water quality monitoring station near Stratford (station 438056).   Data from this station, however, were last collected from October 1993 through September 1995 and are thus considered too old (greater than five years) for characterizing current water quality conditions.   As part of DNR's expanded water quality monitoring program, monthly monitoring at the Stratford station began in October 1999.   Results from this monitoring will allow development of an updated assessment of support of beneficial uses for the 2002 report.   The current assessment was based on results of a DNR/UHL biocriteria sampling in September 1998.   Based on a comparison to results of ecoregion reference site sampling, the aquatic life uses were assessed as "fully supported / threatened."  Fish consumption uses remain assessed as "fully supported" based on results of EPA/DNR fish tissue (RAFT) monitoring in 1994 near Webster City (see assessment developed for the 1996 report above).