The Great Lakes: A Tale of Progress and Challenges
The Great Lakes, a vital freshwater system, are facing a complex reality. While there are bright spots, like clean drinking water and thriving beaches, the overall health of these lakes is a mixed bag. And here's where it gets controversial: a recent report card seems to be missing a crucial piece of the puzzle.
The 2025 State of the Great Lakes report, a collaborative effort between the U.S. EPA and Canada, paints a picture of both successes and ongoing threats. Each of the five Great Lakes received a score, but one key factor was notably absent: climate change.
But here's the catch: The report doesn't mention climate change, even though it was a significant theme in the 2022 assessment. This omission raises questions about the completeness of the picture we're getting.
Let's dive into what the report tells us and what it might be leaving out.
Drinking Water and Beaches: The Good News
The status of treated drinking water from the Great Lakes has been consistently good for over a decade. This is a huge deal, as over 40 million people rely on these lakes for their daily water needs. In 2023 alone, 97% of residents had access to water meeting all health standards.
Beaches, too, are a success story. These coastal areas, enjoyed by millions annually and contributing significantly to local economies, have maintained their good status. However, some beaches still face issues with bacteria contamination, reminding us that challenges remain.
Invasive Species: A Growing Threat
Invasive species are a major concern, and their impact has more than doubled since 1950. The report highlights the zebra and quagga mussels, native to eastern Europe, as the worst invaders. These mussels have caused substantial harm to the ecosystem and economy, impacting fish populations and even pushing lake whitefish to the brink of collapse in Lakes Michigan and Huron.
The emerald ash borer, an invasive beetle, continues to wreak havoc on forests around the region. By boring into wood and eating tissues under the bark, this beetle has killed hundreds of millions of trees, with over 50 million in the Midwest alone.
Nutrient Loads and Algae Blooms: Degraded Water Quality
Nutrient loads and algae blooms are a persistent problem across the Great Lakes. High nutrient levels drive increases in blue-green algae blooms and Cladophora, a type of algae that grows on the lake bottoms. Some of these blooms can be harmful, releasing toxins like microcystin.
Harmful algae blooms are particularly prevalent in western Lake Erie, driven by agricultural fertilizers making their way into the lake via the Maumee River. These blooms also impact localized areas, such as Green Bay in Lake Michigan, Saginaw Bay in Lake Huron, and Lake St. Clair, between Lakes Erie and Huron.
The Missing Piece: Climate Change
The 2025 report acknowledges physical changes in the Great Lakes, such as increased precipitation, warmer water temperatures, and declining ice cover. For instance, maximum ice cover has declined across all five lakes since 1973, with Lake Superior experiencing the largest drop.
And this is the part most people miss: climate change has been impacting the Great Lakes for decades. Ignoring it doesn't make it go away. Changes made by the Trump administration have made it harder to track these impacts, from removing mentions of climate change from government websites to dismantling leading research centers.
A Call for Action
Efforts to clean up legacy pollution and restore habitats have led to many of the improvements noted in the report. However, there's a story the report isn't telling. Many communities still face challenges with lead pipes and affordability, impacting their access to clean drinking water.
"It calls for a fresh look at what it means for the Great Lakes region to be healthy," says Caitlin Looby, an environment reporter for the Milwaukee Journal Sentinel. "We have to face this problem head-on."
So, what's your take? Do you think the report gives a complete picture? Are there other factors we should consider? Let's discuss in the comments and continue this important conversation.
