Harmful Algal Bloom Closes Swimming At Round Valley

LEBANON, NJ — Swimming is closed until further notice at Round Valley after a Harmful Algal Bloom (HAB) was confirmed in the swimming impoundment, announced New Jersey State Park Service Officials.

While swimming is off-limits, the main reservoir is still open for boating from the Fish & Wildlife Boat Launch. Swimming is never permitted in the main reservoir and only in the designated areas.

"Harmful algal blooms (HABs) occur when algae — simple photosynthetic organisms that live in the sea and freshwater — grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals, and birds," according to the National Ocean Service.

Human illnesses caused by HABs, though rare, can be debilitating or even fatal, according to the National Ocean Service.

Round Valley Reservoir in Hunterdon County covers 2,350 acres and reaches about 180 feet deep, making it the second-deepest lake in New Jersey and largest reservoir.

To inquire about the current HAB alert level call the Round Valley Park Office at 908-236-6355.

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