2020 Long Pond Pond Test Results
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.
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
- 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.