The following water quality updates have been issued for Tuesday, November 14, 2023:

  • The Cyanobacteria Monitoring Program has concluded for 2023.
  • A final seasonal sample collecte at Parker Pond, Osterville indicated that a Pet Advisory continues due to the presence of Microcystin toxins in the pond water. This posting will remain in place until the start of the 2024 Cyanobacteria Monitoring Program next May.

Current postings as of Tuesday, November 14, 2023:

Cyanobacteria Pet AdvisoryPet Advisory

Parker Pond, Osterville








If you are interested in receiving more information about Cyanobacteria and locations monitored, you may view the 2023 Cyanobacteria Monitoring Map at

If you are interested in receiving email notifications when there is a potential toxic bloom identified by Association to Preserve Cape Cod (APCC), you may opt-in by clicking this link: where you will be asked to enter your email address in order to receive cyanobacteria alerts.

Thomas A. McKean, RS, CHO
Director of Public Health