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Application.2

C - Progress

The Great Lakes border not only the US, but also Canada.  The water quality of the lakes affects both countries, so we have to work together to provide a future for the lakes and the people who live on them.  Both countries signed an agreement called "The Great Lakes Water Quality Agreement" that has helped us clean up the lakes. 

checkmarkClick here to go to the STATE OF THE LAKES site.

  1. Overall, which lake had the highest concentration of phosphorus in 1991/92?
  2. Which lake had the highest concentration of PCB's in fish?
  3. Which lake had the highest concentration of PCB's in gull eggs?
  4. Which lake had the second highest concentration of PCB's in gull eggs?
  5. Compare the small inset map in the upper right corner to the larger map. Which areas show the greatest improvement between 1983 and 1991?
  6. What does the graph of the PCB concentration at Mugg's Island show is happening over time?
  7. What do you think caused the trend in question 4 above?

 

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