The Plymouth Public Health Department tests public bathing beaches, in accordance with the MA State Sanitary Code Ch. VII. The Town does not perform water quality tests for private ponds and/or beaches. There are several labs in the area that will perform this test at your request. You may search through Google or go to the MA DEP website to find a water testing facility.
Please note, the Town of Plymouth does not endorse nor provide preferential treatment to any business.