Emergency crews responded to Deer Island on Friday afternoon for a hazardous materials incident at a state waste treatment facility.
According to the Massachusetts Water Resources Authority, a 55-gallon drum at its Deer Island wastewater treatment plant was bulging a bit and the hazmat response was only precautionary.
Boston police confirmed that they were on scene at 190 Tafts Avenue on Deer Island but had no further information.
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Boston fire said they responded for a container filled with hazardous waste products that was overpressurized. The pressure was released and a cleanup company called in.
There were no exposures or spills and no one was injured. Fire officials said the building was evacuated as a precaution.