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A DECADE OF RESEARCH

LAYING THE FOUNDATION FOR A
CLEANER GREEN LAKE

A decade of science & collaboration

From watershed studies and nutrient research to enabling over $1.1 million in partner-awarded grants through our watershed planning and assembling a Science Advisory Panel, each milestone has been a step toward restoring the lake’s health. Looking ahead, continued scientific inquiry and targeted phosphorus reduction efforts will shape the future of Green Lake’s water quality. 

Since Green Lake was listed as impaired in 2014, the Green Lake Association has been building a science-based, partnership-driven strategy to tackle the phosphorus challenge. Through cutting-edge research, strategic planning, and collaborative action, we’ve laid the groundwork for real solutions.

BE PART OF THE SOLUTION

TIMELINE OF KEY STUDIES & STRATEGIC MILESTONES

DIG INTO MORE RESEARCH

PUTTING SCIENCE TO WORK

For years, we’ve focused on reducing phosphorus runoff from the land. But new research has made it clear: land-based efforts alone aren’t enough—and time isn’t on our side.

The Problem Isn’t Just Runoff

Even with investments in stream restoration and farm practices, phosphorus levels remain high. That’s because Green Lake isn’t just taking in phosphorus—it’s cycling it from within. Legacy phosphorus stored in the lakebed is re-released, fueling algae growth and poor water quality.

We Can’t Wait Decades

Green Lake holds water for up to 20 years. Phosphorus entering today will linger for decades. Without stronger action, we risk never reaching our clean water goals.

An Actionable Path Forward

To accelerate recovery, we’re turning to science-based solutions that trap, intercept, or neutralize phosphorus before it causes harm. These include wetland capture systems and sediment inactivation technologies that work alongside land-based strategies for measurable impact.

Be Part of the Solution

Join us in restoring Green Lake. Your support helps advance the science and action needed to reduce phosphorus and protect the lake for generations to come.

If you’d like to support the cause of restoring Green Lake and join our efforts to get phosphorus under control, please consider making a donation today.

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