Iowa DNR
Iowa DNR
ADBNet
Water Quality Assessments
Impaired Waters List

Lake Ahquabi IA 04-LDM-1080

Warren County S14T75NR24W 4 mi SSW of Indianola.

Assessment Cycle
2000
Result Period
1996 - 1998
Designations
Assessment Methodology
Assessment Type
Monitored
Integrated Report
Category 0
Trophic
Eutrophic
Trend
Improving
Legacy ADBCode
IA 04-LDM-02615-L_0
Overall Use Support
Fully
Aquatic Life Use Support
Fully
Fish Consumption
Not assessed
Primary Contact Recreation
Not assessed
Drinking Water
Not assessed
Documentation
Assessment Comments

Assessment based on (1) post-restoration studies by IDNR Fisheries Bureau 1997-98, (2) results of IDNR beach monitoring program 2000-01, (3) ISU lake survey in 2000-01, & (4) ISU report on lake plankton communities.

Basis for Assessment

SUMMARY:  The Class A (primary contact recreation uses) were "not assessed."  The Class B(LW) aquatic life uses were assessed as "fully supported."  Class C (drinking water) and fish consumption uses were "not assessed."  EXPLANATION:  The level of support of the Class A (primary contact recreation) uses was "not assessed" due to the lack of information on levels of indicator bacteria at this lake.   The assessment of support of the Class B(LW) uses ("fully supported") was based a recommendation of the DNR Fisheries Bureau in 2000 and on results of water quality monitoring that followed the lake restoration project.   This monitoring showed significant improvements in water quality and fish populations (see Bonneau 1999).   This post-project monitoring is to continue through 2002.   Fish consumption uses remain "not assessed" due to the lack of fish contaminant monitoring at this lake.

Monitoring and Methods
Assessment Key Dates
10/18/2001 Fixed Monitoring End Date
5/22/2000 Fixed Monitoring Start Date
Methods
340 Primary producer surveys (phytoplankton/periphyton/macrophyton)
420 Water column surveys (e.g. fecal coliform)
120 Surveys of fish and game biologists/other professionals
220 Non-fixed station physical/chemical monitoring (conventional pollutant only)
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
Nutrients Overall Use Support Not Impairing
  • Source Unknown
  • Not Impairing
Nutrients Aquatic Life Support Not Impairing
  • Source Unknown
  • Not Impairing
Nutrients Primary Contact Recreation Not Impairing
  • Source Unknown
  • Not Impairing