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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The Fall 2026 LakeWatch Newsletter Is Here!

Our latest issue of LakeWatch is now available to read online!

Take a look inside to explore what’s happening around Seneca Lake! From monitoring HABs, Cladophora, and changing lake conditions to conservation projects reducing pollution, hands-on experiences with HWS interns, and the Guild family’s lasting connection to Seneca Lake, this issue highlights the people, projects, and partnerships helping protect our watershed.

Read the Fall 2026 LakeWatch Newsletter

Featured Projects

Pure Brew Week Community Fundraising

Sediment, Nutrient, & Pollution Reduction

Hemlock Woolly Adelgid Prevention & Treatment

Latest News

October 23, 2026
Fall 2026 LakeWatch Newsletter Now Available!

Geneva, N.Y. – We are excited to share the Fall 2026 edition of LakeWatch! From changing lake conditions and conservation projects to community partnerships and volunteer efforts, this issue highlights the people and programs working to protect Seneca Lake and its watershed. Inside this issue: Watching the Lake Together: HABs, Cladophora, and changing lake conditions Conservation...

October 19, 2026
An Update on Our Lake Level Efforts

GENEVA, N.Y. – Seneca Lake Pure Waters Association (Pure Waters) continues to work with state officials, regulatory agencies, and community leaders to address ongoing lake level concerns and advocate for improved lake level management. As these discussions and efforts move forward, we want to keep our members and the broader community informed about the steps...

September 24, 2026
Lake Level Update: Where Things Stand

GENEVA, N.Y. – We continue to hear questions and concerns from residents about Seneca Lake levels and the malfunction of low-level Gate #4 at the Seneca Falls Development. Those concerns are understandable, especially after a year that has created issues for homeowners, boaters, and more due to high and low water conditions. Pure Waters has...