Wednesday August 18, 2021
3:50 p.m.

Today’s Update:
Kalmus Beach is re-opened to swimming.   The beach was resampled and analyzed at the County laboratory late this afternoon.   This beach now meets the Massachusetts Bathing Beach Regulations, 105 CMR 445.00 and is re-opened.

Parker Pond was sampled and was found to have high levels of Cyanobacteria concentrations.  It is being posted at the warning level.  

Cyanobacteria Postings: 


  • Muddy/Crocker Pond, Marstons Mills
  • Long Pond, Marstons Mills

To protect yourself and pets:

  • Do not drink pond water.
  • Do not swim.
  • Keep pets and livestock away.
  • Avoid areas with scum while boating and do not eat fish.

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Call your doctor or veterinarian if you or your animals have a sudden or unexplained sickness or signs of poisoning.

 Warning Level 

Lovell’s Pond, Marstons Mills
Parker Pond

 Pet Advisory Level
Shubael’s Pond, Marstons Mills

If you are interested in receiving more information about Cyanobacteria and locations monitored, you may view the CyanoMAP at to see recent cyanobacteria monitoring results from APCC.  If you are interested in receiving email notifications when there is a potential toxic bloom identified by APCC, you may opt-in to the APCC toxic alerts.  In order to receive email notification for toxic alerts, click this link:    This link will bring you to a webpage where you will be asked to enter your email address in order to receive toxic alerts. 

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