Lake Oscawana Management Advisory Commission - LOMAC

09/07/2026

Any one missing this:

A small blow up row boat?

08/19/2026

The Harvester crew found a set of stairs floating in Oscawana Lake. They are currently located at the Wildwood Knolls boat ramp. If these are yours contact
Karen Kroboth
District Clerk
Town of Putnam Valley
845-526-2160
[email protected]

08/15/2026

The NO WAKE ZONE on Oscawana Lake has been lifted as of 8/14/2026.

Water levels remain higher than normal at this time of year, so please avoid creating wakes near the shorelines to avoid swamping docks and property and to help protect the shoreline from additional erosion.

While algae has been observed floating throughout the water column, it appears safe for swimming. However, please avoid swimming in any areas where you see any concentrations of algae as it may be Cyanobacteria and could be toxic. Currently there are no signs at the District Beaches.

Thank you for being a good neighbor and helping keep Oscawana Lake safe and enjoyable for everyone.

If you see things pls continue to send pictures to us. Thanks.

08/15/2026

The town has lifted the lake wide No wake zone. However please mind the usual zones as the lake is still a bit higher than normal.

08/08/2026

***** Notice of Possible Cyanobacteria ******

August 8, 2026

To All Residents of Lake Oscawana:
Following the recent storms, members of LOMAC have noticed clumps of algae both on the surface and throughout the water column of Lake Oscawana in several locations along the shoreline. Our lake scientist believes, based on a photo we have sent her, that it is likely that at least some of this algae is cyanobacteria. The large amount of nutrients washed into the lake by the recent heavy rains, combined with the hot weather, are an excellent breeding ground for cyanobacteria. Cyanobacteria can, where it is more concentrated, be toxic to humans and pets. LOMAC urges all residents using the lake to be cautious and not to swim in areas where there is a high concentration of algae in the water, whether along the shoreline or in open water. If you spot anything unusual, please take a photo and send it to LOMAC at [email protected].
A lake scientist is scheduled to be at the lake this week and will test the water to confirm if these algae clumps are cyanobacteria. Once the test results are available, we will post a further notice on our Town web page.
LOMAC

08/08/2026

Mistake on my part posted earlier; there is no meeting today, other than the district budgets this morning!

But keep the no-wake zone —and if you see any green on the lake, take a picture and send it in for analysis, as it may be a harmful algae bloom at this point due to all this rain. If it looks green, we advise not going in it or allowing your animals near it until we determine what it is, in which case your pictures can help.

08/03/2026

Please everyone who goes to to Lake Oscawanna Remember the ENTIRE lake is a NO Wake Zone due to the State of Emergency flood going on.
If you create wakes you at this time you are flooding your neighbors houses and ruining their property. Please don't do it.

06/13/2026

Thank you all for participating today. The presentation will be uploaded to the Town's website for review shortly. 🙂

05/14/2026

District residents On the LOMAC email list should have received the newsletter. Pls check your emails. If you didn’t get it and want it pls make sure your on the email list or check your spam folders. It should be posted on the town website soon. Items in the news letters will be discussed on June 13th town hall meeting.

04/19/2026

If you did not get any recent emails from us and want to sign up
https://forms.gle/tmhNmDKJEquDmGXVA
this will place you on LOMAC’s future list for newsletters and emails.

Lake Oscawana Management Advisory Commission