Great Lakes
This Great Lake is the largest by surface area.
What is Lake Superior?
This fish, Wisconsin’s state fish, is highly prized by anglers.
What is the muskellunge (muskie)?
The average American uses about this many gallons of water per day at home.
What is 80–100 gallons?
This Great Lake is the shallowest, making it warmest and often among the most biologically productive.
What is Lake Erie?
This invasive mollusk, first detected in the Great Lakes in the 1980s, clogs water intake pipes and alters ecosystems.
What is the zebra mussel?
About two-thirds of Wisconsin residents get their drinking water from this source, rather than lakes or rivers.
What is groundwater (aquifers)?
The Great Lakes hold roughly this portion of the world's surface freshwater.
What is one-fifth (20%)?
This non-native carp is a major concern because of its potential to enter and disrupt the Great Lakes ecosystem.
What is Asian carp (bighead/silver carp)?
This toxic metal, often from old pipes and plumbing, has been a major drinking water concern in Milwaukee and other U.S. cities.
What is lead?
This U.S. state touches four of the five Great Lakes.
What is Michigan?
This invasive fish entered the Great Lakes through man-made canals and devastated native lake trout populations.
What is the sea lamprey?
Runoff containing this nutrient is the main driver of harmful algal blooms in the Great Lakes.
What is phosphorus?
The waters of the Great Lakes eventually flow into this river en route to the Atlantic.
What is the St. Lawrence River?
Stocking programs for this fish have supported Great Lakes sportfishing since the 1960s, even though it is not native.
What is the salmon (Chinook/coho)?
This group of chemicals, found in firefighting foams and many consumer products, is known as “forever chemicals” because they don’t break down in the environment.
What are PFAS (per- and polyfluoroalkyl substances)?