Blue‑Green Algae Makes an Unwelcome Appearance at Marlborough’s Fort Meadow Reservoir

The Marlborough Board of Health issued an alert on Thursday after staff spotted noticeable blue‑green algae blooms floating on the surface of Fort Meadow Reservoir. The growth, which can look like streaks of paint, pea‑soup clouds or clumped mats, poses a health risk to anyone who comes into direct contact with it.

Officials are telling people to be extra careful if they plan to swim, fish, kayak or simply walk along the water’s edge. The simple rule is: stay away from any area where you can see the greenish scum. If you do happen to get it on your skin or in your eyes, rinse thoroughly with clean water and keep an eye out for symptoms such as rash, stomach upset or irritation. When in doubt, call a medical professional.

Pets, especially dogs that love to plunge into ponds, are also vulnerable. Keep your furry friends on leashes and steer clear of the discolored water. The Board’s hotline (508‑460‑3751) is available for questions, and the state’s algae information page offers more details on what the blooms mean and how they’re being monitored.

While the reservoir remains a popular spot for recreation, the health department’s message is clear: enjoy the water, but avoid the visible algae. As the blooms can shift with wind and currents, keep checking for any new patches before you dive in.

For the latest updates, residents can follow local news sources or sign up for Patch alerts. Staying informed helps everyone stay safe while the community works to understand and manage the algae situation.