Assessment Comments

Station 300520 (21IOWA) north of Olin, Jones County. Station 008712 (1117MBR) near Grand Mound, Scott County. NAWQA near DeWitt.

Basis for Assessment

No assessment of Class A primary contact uses:  insufficient data; continued to use assessment of Class B(WW) uses (=FST) developed for the 1996 report.   Used results of RAFT trend monitoring near Grand Mound in 1994 and 1996 to assess support of fish consumption uses as FS:  levels of all contaminants were less than 1/2 of FDA action levels in both the 1994 and 1996 composite samples of whole-fish carp.   As part of the USGS National Water Quality Assessment (NAWQA) program in the eastern Iowa river basis study area, fish tissue montoring was conducted in the Wapsipinicon R.  near DeWitt in September 1995.  The composite sample of whole-fish carp contained detectable levels of several organochlorine contaminants, including chlordane, dieldrin, DDT and PCBs.   All levels of these contamiants were less than 1/2 the respective FDA action levels, thus suggesting full support (=FS) of fish consumption uses.  See USGS Fact Sheet FS-027-97 (March 1997) for more information.