Sudbury panel permits one-time algal treatment at Camp Sewataro swimming pond

The Sudbury Conservation Commission on June 9 approved a one-time algal treatment for the swimming pond at Camp Sewataro to address cyanobacteria and low water clarity and allow the pond to open this summer.

Coordinator Lori Capone briefed commissioners that the swimming pond had been closed last summer after a cyanobacteria bloom and that current water clarity in the swimming pond measured only about two feet, below the four-foot clarity standard required for opening. A recent treatment cleared the swimming pond temporarily, but circulation from the fishing pond allowed beneficial algae to flourish again. The camp proposed disconnecting the swimming pond from the fishing pond for the summer and applying a one-time algal treatment to the swimming pond; additional treatments would require further Commission approval.

Commissioner Kasey Rogers cautioned that without filtration or ongoing water exchange the swimming pond could develop bacterial issues such as E. coli or Pseudomonas as temperatures rise, and she urged caution about relying on repeated chemical treatments. Commissioner Ken Holtz suggested permitting the current treatment as a short-term measure but requiring the camp to consult the Commission before reconnecting the ponds. Commissioner Mark Sevier noted that converting the swimming pond to a conventional pool with filtration would be a longer-term, costly option.

On motion by Commissioner Holtz, seconded by Commissioner Sevier, the Commission voted unanimously to permit the one-time algae treatment; staff and the camp were directed to consult with the Commission before any reconnection or additional treatments.