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View of Lake Mendota looking toward Picnic Point on December 25, 2022

Frigid air temperatures, combined with cold water and low winds, helped Lake Mendota officially freeze on December 25th, 2022. The declaration came from the Wisconsin State Climatology Office. Lake Mendota, the largest lake in the Yahara Watershed, froze five days after December 20th. December 20th is the median ice-on date for the largest lake in the Yahara River Watershed. The Christmas Day freeze date is over a month shy of January 30th – which is the latest date that ice-on has ever been declared (1/30/1932).

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2022 Community Coffee and Annual Meeting

On May 18th, 2022, more than 300 leaders throughout the Greater Madison-Dane County region met at The Edgewater on the shores of Lake Mendota. The meeting celebrated what promises to be a new era of collaboration to benefit our local waters. With a collective call to “Renew the Blue,” a 19-member coalition of organizations introduced what some might describe as a stakeholder declaration to a sold-out audience.

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Lake Mendota looking toward Picnic Point

Ice-on date arrives days after the new year

Air temperatures below the freezing mark throughout the last week, combined with cold water helped Lake Mendota officially freeze on Sunday, January 3rd, 2021, as declared by the Wisconsin State Climatology Office. Lake Mendota, the largest lake in the Yahara Watershed, froze 27 days shy of January 30th – which is the latest date that ice-on has ever been declared (1/30/1932).

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Schluter Beach 20May2020

Making Progress For Our Lakes

In 2019, Clean Lakes Alliance’s work was focused on actions that increased community engagement and reduced phosphorus runoff into the lakes. Keep reading to learn more about our 2019 achievements. These actions could not have been accomplished without the dedication and support of our boards, committees, donors, volunteers, staff, partners, and the community.

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Bernies Beach

A shared vision for clean, safe, and accessible lakes

In August 2019, leaders from government, business, and nonprofit organizations came together with a shared vision. The vision included a future in which Greater Madison’s five Yahara lakes are clean, safe, and accessible for everyone. Together, the 19 partners and collaborators formed the Yahara CLEAN Compact and committed to sharing resources and working together to curb pollution and chart the best path forward to cleaner, healthier lakes.

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2019 Thankful For

Things we’re thankful for at Clean Lakes Alliance

At Clean Lakes Alliance, we’re thankful to be part of a community that is surrounded by five beautiful lakes. Our Yahara lakes provide ecological diversity, recreational opportunities, economic benefits, and endless beauty to the Greater Madison area, its residents, and guests.

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2018 Annual State of the Lakes Report

2018 takeaways

  • Cyanobacteria (blue-green algae) blooms appeared in our lakes at an alarming scale, highlighting continued challenges with water quality.
    • 72% of beach closures from Memorial Day to August 20th were due to cyanobacteria blooms
    • June continues to be the biggest month for cyanobacteria blooms for the fourth year
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Lake Mendota Ice

This is the start of something big

A message from Clean Lakes Alliance Executive Director, James Tye

Dear Friends,

As we close the books on a difficult year for our lakes, I want to take a moment to reflect on what went well, and what we can do to start 2019 off in the right direction.

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