Prairie Rose Lake IA 05-NSH-1462

Assessment Comments

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."  The Class C (drinking water) uses and the fish consumption uses were "not assessed."  EXPLANATION:  The level of support of the Class A (primary contact recreation) uses was changed from "fully supported / threatened" to "not assessed" due to the lack of information on levels of indicator bacteria at this lake.   This change in assessment reflects a change in the DNR's Section 305(b) assessment methodology and does not reflect any known change in water quality.   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.   The Class C (drinking water) uses remained "not assessed" due to lack of information upon which to base an assessment.   The level of support of the fish consumption uses was changed from "fully supported" to "not assessed" due to the lack of recent fish contaminant monitoring at this lake.   Fish tissue monitoring was last conducted at this lake in 1992 as part of the EPA/DNR Regional Ambient Fish Tissue (RAFT) Monitoring program.   The results from this monitoring are now considered too old (greater than five years) for characterizing current water quality conditions.