The Rhode Island Department of Health and the Department of Environmental Management have issued health advisories for Roger Williams Park Ponds and Mashapaug Pond due to blue–green algae blooms. Recreational activities in the bodies of water, both located in Providence, are discouraged.
Blue–green algae blooms, also known as cyanobacteria, can produce naturally occurring algal toxins. The blooms are bright green and often resemble green paint or thick pea soup.
Until further notice, the following should be avoided:
Swimming, boating and fishing in these ponds
Eating fish caught in these ponds
Allowing pets to enter into or drink from these ponds.
Those who come into contact with the algae blooms should rinse their skin with clean water as soon as possible and wash their clothes. Common side effects that result from contact with water containing toxins include skin rashes and irritation of the eyes, nose or throat.