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Home » Seneca County » More HABs reported on Seneca Lake: Where are they?

More HABs reported on Seneca Lake: Where are they?

Seneca Lake is feeling the effects of dry weather and warming temperatures, according to the latest weekly water quality update from the Seneca Lake Pure Waters Association.

Between September 5 and 11, six harmful algal blooms (HABs) were reported, while lake levels dropped to 445.19 feet amid a broader regional Drought Watch declared by the DEC.


HABs and water quality snapshot:

  • HABs reported: 6
  • Lake level: 445.19 ft
  • Surface water temperature: 68.6°F
  • Turbidity: 0.83 NTU
  • Dissolved oxygen: 107%

Although no mandatory water restrictions are in place, the association urges residents and visitors to conserve water voluntarily, especially given the lack of rainfall in the forecast.

Lake users should also stay alert for HABs, which often appear as green surface scum or streaks resembling spilled paint. Residents are encouraged to report suspicious blooms to the NYS DEC or email [email protected] with photos and location details.

Community, conservation, and volunteer news

  • At its Annual Meeting, Pure Waters celebrated the 3,290 hours of volunteer service contributed last year and honored standout contributors, including Mimi Gridley, Sue Martin, Don Kloeber, and Jill Ritter.
  • Public comments are now open on proposed habitat restoration projects funded by the 2022 NYS Environmental Bond Act. These efforts aim to protect water quality and build climate resilience across the region.
  • A volunteer opportunity is coming up on September 17 to help hand-pull invasive yellow floating heart at Sycamore Hill Gardens in Marcellus. Volunteers can sign up online and enjoy free pizza after the event.

As fall approaches, Pure Waters reminds residents that turning off outdoor lights at night can help protect migratory birds passing through the Finger Lakes—some flying thousands of miles nonstop.