The following water quality updates have been issued for Tuesday, August 22, 2023:

  • A Public Health Advisory will be removed from Long Pond, Marstons Mills within 24 hours due to improved conditions at this pond with acceptable cyanobacteria levels.

Current postings as of Tuesday, August 22, 2023:

Public Health AdvisoryPublic Health Advisory

Parker Pond, Osterville








Cyanobacteria Pet AdvisoryPet Advisory

Lovells Pond, Cotuit








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