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Lake Huron Symposium: PowerPoint Presentation
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Lake Huron Symposium:

Lake Huron Symposium:

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Lake Huron Symposium:

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Presentation Transcript

  1. Lake Huron Symposium: Critical Pollutants Related to the Fisheries of Lake Huron Bob Day Michigan Department of Environmental Quality Surface Water Quality Division Alan Hayton Ontario Ministry of the Environment Sport Fish Contaminant Monitoring Program

  2. Michigan Department of Environmental Quality Fish Contaminant Monitoring Program • Edible Portion Monitoring (70%) • Whole Fish Trend Monitoring (25%) • Caged Fish Monitoring (5%) Ontario Ministry of the Environment Sport Fish Contaminant Monitoring • Edible Portion Monitoring - Skinless boneless dorsal fillet (with few exceptions)

  3. Contaminant Concentration Criteria

  4. Consumption Limiting Contaminants in Lake Huron Dioxins 6% Dioxins 30% PCBs 61% PCBs 38% Mercury 4% Toxaphene 6% Mercury 50% Chlordane 6% Ontario Waters Michigan Waters

  5. Total PCBs Lake Huron Edible Portion Samples Criteria: 0.05 ppm (Great Lakes States)

  6. Total PCBs Lake Huron Watershed Edible Portion Criteria: 0.05 ppm (Great Lakes States)

  7. Apparent Toxaphene Lake Huron Watershed Edible Portion Samples Criteria: 0.2 ppm (OMOE)

  8. 2,3,7,8-TCDD Toxic Equivalents Lake Huron Edible Portion Samples Criteria: 10 ppt (MDCH,OMOE)

  9. 2,3,7,8-TCDD Toxic Equivalents Lake Huron Watershed Edible Portion Samples Criteria: 10 ppt (MDCH, OMOE)

  10. Total Chlordane Lake Huron Watershed Edible Portion Samples Criteria: 0.3 ppm (MDCH, USFDA)

  11. Total DDT Lake Huron Criteria: 1.0 ppm in whole fish (GLWQA)

  12. Total DDT Lake Huron Watershed Criteria: 1.0 ppm in whole fish (GLWQA)

  13. Total MercuryLake Huron WatershedEdible Portion SamplesCriteria: 0.45 ppm (OMOE)

  14. PBB(Firemaster BP-6)Edible Portion SamplesCriteria: 0.3 ppm (MDCH) MirexCriteria: “less than detection levels as determined by the best scientific methodology available” (GLWQA)

  15. Lake Huron Whole Lake TroutAverage Total PCB Concentrations

  16. Lake Huron Whole Lake TroutAverage Apparent Toxaphene Concentrations

  17. Lake Huron Whole Lake TroutAverage Total DDT Concentrations

  18. Lake Huron Whole Lake TroutAverage Total Chlordane Concentrations

  19. Tributary Mouth Caged Fish Monitoring

  20. Saginaw River 1993 Caged Fish StudyTotal DDT Concentrations