Timothy Randhir, 2018 PEP Fellow, says in an interview on Masslive that the recent release of more than a million gallons of raw sewage into Nantucket Harbor could cause significant harm to the harbor’s ecosystem and shellfish populations. “1 million gallons can be significant,” Randhir says. “It’s quite a big volume of wastewater getting into this system.” Rhandir says pathogens in the sewage could enter shellfish, possibly making them dangerous to eat until sufficient time has passed. He also identified another potential risk: the possibility of an algae bloom, due to excess nutrients entering the harbor from the sewage. Algae growth could disrupt the ecosystem and affect shellfish beds, he said.