Iowa DNR
ADBNet

Water Quality Assessments

Impaired Waters List

Maple River IA 06-LSR-1581

mouth (S17, T83N, R44W, Monona Co.) to confluence with unnamed tributary approximately 1 mile east of Danbury in SW 1/4, NE 1/4, S26, T86N, R42W, Woodbury Co.

Assessment Cycle
1994
Release Status
Final
Result Period
1990 - 1992
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 06-LSR-0070_1
Overall Use Support
Partial
Aquatic Life Use Support
Partial
Fish Consumption
Not assessed
Documentation
Assessment Comments

Assessment is based on results of IDNR ambient quarterly monitoring near Mapleton.

Basis for Assessment

Used results from quarterly WQ monitoring station.   No violations of Class B WQC were reported; thus, support of Class B uses should be FS.   Known threats to support of uses from agricultural NPS, and known impacts of channelizat, especially in the lower portion of this waterbody, suggest that the support of aquatic life uses should be assessed as PS.

Monitoring and Methods
Assessment Key Dates
Methods
230 Fixed station physical/chemical (conventional plus toxic pollutants)
Monitoring Levels
Biological 0
Habitat 0
Physical Chemistry 3
Toxic 0
Pathogen Indicators 0
Other Health Indicators 0
Other Aquatic Life Indicators 0
# of Bio Sites 0
BioIntegrity N/A
Causes and Sources of Impairment
Causes Use Support Cause Magnitude Sources Source Magnitude