Boston draining what has turned into a toxic, duck-killing Public Garden Lagoon

The Boston Parks and Recreation Department reports it started draining the Public Garden Lagoon today to try to ride it of toxic grossness that has spawned several 311 complaints about dead ducks.

In a response to one of the complaints, the department says that the buildup of toxic microorganisms was spurred in part by the Covid-19 cancellation of Swan Boats this year - normally, the motion of the boats' paddles introduces oxygen and turbulence, both of which deter the growth of the sort of microscopic nasties that can kill wildlife.

Boston Parks and Recreation Department began draining the Public Garden Lagoon today because the water has become unsafe for wildlife, particularly the ducks. It will take 2-3 days for the lagoon to fully drain. The unusually hot, dry summer has encouraged bacteria and algae growth. What’s more, the Swan Boats are on hold this year. Their paddle wheels introduce oxygen into the lagoon and create turbulence that discourages unwanted growth. We engaged a lake and pond management company to treat the lagoon throughout the month of July. When we saw little improvement after weeks of testing and treatment, we made the decision to fully drain the lagoon, remove sediment at the bottom, and refill it. The condition of the lagoon poses no threat to humans.

H/t fellow 311 browser David W.