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    • A Pond in crisis
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    • 2020 Pond Data
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  • About Cyanobacteria
  • How to Help
FRIENDS OF LONG POND
  • Home
  • About Us
  • About Our Pond
    • A Pond in crisis
    • Why We Love Our Pond
    • Invasive Species
    • 2020 Pond Data
    • Historical Pond Data
  • About Cyanobacteria
  • How to Help
2020 Long Pond Pond Test Results

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​As shown in the below graphs, Long Pond's water temperature was
​generally higher during the summer of 2020 than it was in 2019, and
phycocyanin levels (an indication of cyanobacteria levels)
peaked for a longer period of time during 2020.
Consequently, the pond was closed for one week longer
and had a "Pet Advisory" for one more week.
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A "CLOSURE" designation is based on a mixture of qualitative and quantitative data,
including any or all of the following: 


-  Toxin levels above 10 parts per billion
-  > 70,000 cyanobacteria cells/mL (MADPH)
-  PC insitu bloom forming cyanobacteria >450 ug/l

-  toxic cyanobacteria have collected and
    formed a scum on shore, or a thick film on the 
    surface,
-  bloom may look like paint in the water, and/or
-  the pond show extreme discoloration.


Higher risk for babies and small children.
Moderate health risk for adults.
Highest risk for pets.


Minimum 2 week period of monitoring before lifting closure.
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  • Home
  • About Us
  • About Our Pond
    • A Pond in crisis
    • Why We Love Our Pond
    • Invasive Species
    • 2020 Pond Data
    • Historical Pond Data
  • About Cyanobacteria
  • How to Help