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
2000
Result Period
1996 - 1998
Designations
Assessment Methodology
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 assessed
Documentation
Assessment Comments

Assessment based on surveys by IDNR Wildlife 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 "not supported."  Other beneficial uses remain "not assessed."  EXPLANATION:  The level of support of the Class A (primary contact recreation) uses was changed from "not supported" 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 ("partially supported") was reviewed and approved by the DNR Wildlife Bureau in 2000.

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