Hawthorn Lake IA 03-NSK-862

Assessment Comments

Assessment is based on results of water quality monitoring, RAFT sampling, and surveys by IDNR Fisheries Bureau.

Basis for Assessment

SUMMARY:  The Class A (primary contact recreation uses) were "not assessed."  Continued to assess support of the Class B(LW) aquatic life uses as "fully supported / threatened."  Fish consumption uses remain assessed as "fully supported."  EXPLANATION:  The level of support of the Class A (primary contact recreation) uses remained "not assessed" due to the lack of information on levels of indicator bacteria at this lake.   The previous (1998) assessment of support of the Class B(LW) uses ("fully supported / threatened") was reviewed and approved by the DNR Fisheries Bureau in 2000.   Fish consumption uses remain assessed as "fully supported" based on the results of the 1995 EPA/DNR fish tissue (RAFT) monitoring.   Levels of contaminants in the composite sample of fillets from channel catfish and largemouth bass were less than ½ of the respective FDA action levels and DNR levels of concern for organochlorine contaminants and mercury.   Thus, fish consumption uses were assessed as "fully supported."