June 15, 2022 Today’s Updates:

  • An advisory is being posted at Bearse Pond due to a recent Cyanobacteria bloom observed and tested.  This pond will be retested next week. 
  • Pet advisories are being posted at Mystic Lake, Long Pond Marstons Mills, and at Parker’s Pond due to net daily growth rates of 0.5 at the first two locations and due to a microcystin exceedance of 8 ppb at Parker’s Pond.  APCC has designated these ponds as  “Potential for Concern.”  These ponds will be retested next week

 Warning Level
Bearse Pond (Centerville)

Pet Advisory Level
Long Pond, Marstons Mills
Mystic Lake (Marstons Mills)
Parker’s Pond (Osterville)

To see a map with all monitored ponds and other town’s ponds – check out the Cyanomap at APCC at:


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