Iowa DNR

Water Quality Assessments

Impaired Waters List

Nishnabotna River IA 05-NSH-1412

IA/MO line to (S26 T67NR42W Fremont Co.) to confluence of E. Nishnabotna and W. Nishnabotna rivers in S2 T67N R42W Fremont Co.

Assessment Cycle
Result Period
1998 - 2000
Assessment Methodology
Assessment Type
Integrated Report
Category 0
Legacy ADBCode
IA 05-NSH-0010_0
Overall Use Support
Aquatic Life Use Support
Not assessed
Fish Consumption
Assessment Comments

Assessment is based on results of fish tissue (RAFT) monitoring in 1995.

Basis for Assessment

SUMMARY:  The Class B(WW) aquatic life uses remain "not assessed."  Fish consumption uses remain "fully supported."  EXPLANATION:  The Class B(WW) uses remain "not assessed" due to the lack of water quality data or information upon which to base an assessment (see assessment for the 2000 report above).   Fish consumption uses remain assessed as "fully supported" based on results of the U.S.  EPA/IDNR fish tissue (RAFT) monitoring near Hamburg in 1995.   However, because these data are now considered too old (greater than five years) to accurately characterize current water quality conditions, the assessment category is changed from "monitored" (indicating an assessment with relatively high confidence) to "evaluated" (indicating an assessment with relatively low confidence).

Monitoring and Methods
Assessment Key Dates
9/1/1995 Fish Tissue Monitoring
260 Fish tissue analysis
Monitoring Levels
Biological 0
Habitat 0
Physical Chemistry 0
Toxic 0
Pathogen Indicators 0
Other Health Indicators 0
Other Aquatic Life Indicators 0
# of Bio Sites 0
BioIntegrity N/A