Public Health Advisory signage was posted at Mystic Lake due to a significant amount of Cyanobacteria scum observed at this Lake late yesterday afternoon, on June 12, 2023.

Cyanobacteria Public Health Advisory
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