Preserve
Protect & Promote

Welcome to Seneca Lake Pure Waters Association

Seneca Lake Pure Waters Association is a 501(c)3 organization committed to preserving, protecting, and promoting the abundant resources of the largest Finger Lake. Seneca Lake is a source of drinking water, recreation, and economic opportunity for the greater community and its visitors. Our programs and partnerships make it possible to monitor water quality, educate the public, and evaluate threats to ensure the a healthy future for Seneca Lake and those who depend on it.

HABS 101

Learn how to recognize harmful algal blooms (HABs), why they happen, and how Seneca Lake Pure Waters Association is monitoring and responding to protect our lake.

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Live Lake-Friendly

As one of over 100,000 residents who use Seneca Lake as a primary water source, you can make a difference in the water quality of Seneca Lake.

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Be a Citizen Scientist

Volunteers and citizen science provides the backbone of our organization, allowing us to further our mission through collaborating with partners and providing education and outreach.

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Make an Impact

Membership dues, donations and grants help to fund our water quality monitoring programs and our efforts to preserve Seneca Lake for future generations.

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Our 2024–2025 Annual Report is Now Available

Seneca Lake Pure Waters Association has spent the past year protecting and improving the health of Seneca Lake through research, monitoring, public education, and advocacy. From tackling harmful algal blooms and invasive species to advancing watershed management and nutrient monitoring, our programs continue to grow thanks to the dedication of our volunteers, staff, partners, and supporters.

Discover the highlights of the past year, including new initiatives, program impacts, and community achievements.

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Featured Projects

Pure Brew Week

SNPR Projects

HWA

Latest News

October 10, 2025
Ten Years Protecting Seneca Lake: The Story of Dan Corbett

GENEVA, N.Y. – Volunteers are the backbone of Seneca Lake Pure Waters Association (Pure Waters), contributing thousands of hours each year to protect our lake. With nearly 200 dedicated individuals, they support everything from citizen science to event coordination, making a real difference in preserving Seneca Lake for future generations. This week, I had the...

October 8, 2025
Early Insights from the 2025 HABs Season

GENEVA, N.Y. – The Cyanobacteria Harmful Algal Bloom (HAB) season is not necessarily over, but the worst is most probably behind us. The good news is that it was not as intense as last year. The bad news is that HABs are still with us. HABs continued to occur across the Finger Lakes this year...

September 24, 2025
PURE Brew Collaboration Raises $8,021 for Seneca Lake

GENEVA, N.Y. – Seneca Lake Pure Waters Association (Pure Waters) is beyond grateful to the Seneca Lake Order of Brewers (SLOBs) and Grist Iron Brewing Company for presenting us with a donation of $8,021 raised through this year’s PURE Pils collaboration brew. The check was presented last night, September 23, 2025, at a reception hosted...