Beach & Pond Water Quality Testing

Last Content Update:

Ponds With Active Cyanobacteria Blooms

As of December 30, 2025...

Updates will occur as conditions change, including lifting of advisories.

  • No active cyanobacteria blooms

The Town of Plymouth does not regularly test for cyanobacteria, as it is always present in the water. It is only when it is present in very high quantities that visual observations, confirmed by the Department of Energy and Environmental Affairs, indicate the presence of cyanobacteria (blue-green algae) cells in the above-listed pond(s). This evidence suggests that the level of cyanobacteria in the water may exceed the MDPH guidelines (PDF) for recreational waterbodies in Massachusetts. Accordingly, as recommended by MDPH, a public health advisory is being issued by the Plymouth Public Health Division.  View Cyanobacteria Sign (PDF). An advisory cannot be lifted until the bloom has been visibly clear for two consecutive weeks.

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Find more information on cyanobacteria.

To report a cyanobacteria bloom: Take a photo, document the location and email Plymouth Public Health or email Plymouth Environmental and Energy Division

Public Bathing Beaches - Test Results

Under Massachusetts Department of Public Health regulations for beaches, beach operators must sample bathing water at all public beaches for bacteria each week, using the Enterococcus indicator organism. Under that regulation, beach sampling is conducted weekly during the swim season.

Beach Sampling Results As Of : 9/29/2025

  • Fresh Pond (Open 6/28/25-8/10/25):   NO FURTHER SEASONAL TESTING
  • Hedges Pond (Open 6/23/25-8/10/25): NO FURTHER SEASONAL TESTING
  • Morton Park (Open 5/24/25-9/1/25):  NO FURTHER SEASONAL TESTING
  • Plymouth Beach (Open 5/24/25-9/1/25):  NO FURTHER SEASONAL TESTING
  • White Horse Beach (Open 6/23/25-8/10/25):   NO FURTHER SEASONAL TESTING
  • Nelson Beach (Open 5/24/25-9/1/25): NO FURTHER SEASONAL TESTING

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