Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Decatur Lake IA 06-WEM-1727

Monona County S17T83NR46W 6 mi. WSW of Onawa.

Assessment Cycle
1998
Result Period
1994 - 1996
Designations
Assessment Type
Evaluated
Integrated Report
Category 0
Legacy ADBCode
IA 06-WEM-00430-L_0
Overall Use Support
Not supporting
Aquatic Life Use Support
Not supporting
Fish Consumption
Not assessed
Primary Contact Recreation
Not supporting
Documentation
Assessment Comments

Assessment based on surveys by IDNR Wildlife Bureau.

Basis for Assessment

Continued to use the assessment of support of the Class A primary contact recreation uses and the Class B(LW) aquatic life uses developed for the 1994 report (both uses = NS).   This assessment was reviewed and approved by the DNR Wildlife Bureau, who recommended that siltation from nonpoint sources, as well as hydrological habitat modification, be identified as the primary water quality impairments.

Monitoring and Methods
Assessment Key Dates
Methods
120 Surveys of fish and game biologists/other professionals
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