2021 March - May
March 4, 2021 -- The City Lake Contractor (Solitude Lake Management) had a single boat on the lake, where another "spot-treat" copper algaecide application was likely applied (due to the blue-colored sprayed liquid witnessed) on the lake in certain areas. It was not applied in the southwest lobe as it was preciously, other application locations remain unknown and total quantity administered is also unknown. This copper algaecide application or its returned use as a method was not mentioned in the last January 28, 2021 mailed City letter.
April 15, 2021 -- The City Lake Contractor (Solitude Lake Management) had a single boat on the lake, where another "spot-treat" copper algaecide application was likely applied (due to the blue-colored sprayed liquid witnessed) on the lake in certain areas. Total application locations remain unknown and total quantity administered is also unknown.
April 28, 2021 -- The City Lake Contractor (Solitude Lake Management) had a single boat on the lake, where another unknown chemical "spot-treat" application (a dark brown/black color liquid witnessed) was applied. It did not appear to be cooper algaecide like the previous sprayings on the lake in certain areas. An herbicide-like smell was detected. Total application locations remain unknown and total quantity administered is also unknown. This chemical type/ treatment was not described by the City.
May 6, 2021 -- The City Lake Contractor (Solitude Lake Management) had a single boat on the lake, where another "spot-treat" copper algaecide application (a bright blue liquid witnessed) was applied. Total application locations remain unknown and total quantity administered is also unknown. This chemical type/ treatment was not described by the City.
May 25, 2021 -- The City Lake Contractor (Solitude Lake Management) had a single boat on the lake, where another "spot-treat" copper algaecide application (a bright blue liquid witnessed) was applied. Total application locations remain unknown and total quantity administered is also unknown. This chemical type/ treatment was not described by the City.
As the photos illustrate, below, overall green filamentous algae is growing and remains a constant despite the various unknown spraying treatments done by Solitude Lake Management. These spray treatments again have had little to no effect on the filamentous algae and other types; and are a waste of time and money at improving the water quality of Harbor Isle Lake. Adding beneficial bacteria and improving the current design of the aeration system (via additional bottom aerators in lake lobes) remains unaddressed or investigated.
The turbidity of the water remains high. The lake has been observed to turn a brown-mahogany color during blooms of "mahogany tide" caused by the "Prorocentrum minimum" algae-- which is another type of toxic harmful algae bloom (HAB). This algae type was confirmed with the last DEP sampling in March 2021.
March 1 2021
Northwest Lobe
Various Stages of Blue-Green Algae in Lobe
Brown-green scum at cattails' edge, bright green scum within cattails
Odor
Day 26 after peroxide treatment
March 5 2021
Southeast Lobe
Blue-Green Algae Build-Up
Green streaking
Day 30 after peroxide treatment
Day 1 after copper algaecide
March 5 2021
Southern (Entrance) Lobe
Brown-Green Scum
Blue-Green Algae Build-Up
Green streaking
Day 30 after peroxide treatment
Day 1 after copper algaecide
March 10 2021
Southern (Entrance) Lobe
Blue-Green Algae
Green streaking
March 12 2021
Southern (Entrance) Lobe
Blue-Green Algae
Green Build-Up and streaking
Day 7 after cooper algaecide
March 13 2021
Southeast Lobe
Brown (Like Dying Stage) Blue-Green Algae build-up
Bright green filamentous algae growth
March 15 2021
Southeast Lobe
Bright green filamentous algae growth
Brown turbid water
March 21 2021
Southern (Entrance) Lobe
Brown /Gray-White stage of Blue-Green Algae build-up - dying?
March 25 2021
Southeast Lobe
Bright green filamentous algae growth
Brown turbid water
March 29 2021
Southern (Entrance) Lobe
Brown /Gray-White stage of Blue-Green Algae build-up - dying?
Bright green filamentous algae growth
March 29 2021
Northwest Lobe
Bright green filamentous algae growth
March 29 2021
Southeast Lobe
Brown /Gray-White stage of Blue-Green Algae build-up
Bright green filamentous algae growth
April 2 2021
Southeast Lobe
Bright green filamentous algae growth
Small amount of duckweed present within this algae (small round specs)
April 5 2021
Southern (Entrance) Lobe
Bright green filamentous algae growth
Gray-brown turbid water
April 12 2021
Southern (Entrance) Lobe
Blue-Green Algae Streaking
April 12 2021
Northwest Lobe
Bright green filamentous algae growth
Turbid Water
April 13 2021
Southern (Entrance) Lobe
Blue-Green Algae Streaking
Green filamentous algae growth
Small amount of duckweed present on surface (small round specs)
April 15 2021 - Morning
Southeast Lobe
Bright green filamentous algae growth
Turbid Water
April 15 2021 - Evening
Southeast Lobe
Bright green filamentous algae growth turning brown (dying) due to contact spraying of *algaecide
April 17 2021
Southeast Lobe
Brown dying filamentous algae on surface;
submerged algae still green
April 18 2021
Southeast Lobe
Green floating and submerged filamentous algae, *algaecide treatment had little to no effect on control
April 19 2021
Southeast Lobe
Blue-Green Algae Streaking
Likely Dying Stage
April 20 2021
Southeast Lobe
Blue-Green Algae Streaking
April 20 2021
Southern (Entrance) Lobe
Blue-Green Algae Streaking
April 22 2021
Southeast Lobe
Blue-Green Algae Streaking (Dying? White Color with small bubbles)
Green filamentous algae growth
April 26 2021
Southeast Lobe
Blue-Green Algae Build-Up
Bright green filamentous algae growth
April 26 2021
Southern (Entrance) Lobe
Blue-Green Algae Streaking
Filamentous Algae &
Duckweed Present
April 27 2021
Southern (Entrance) Lobe
Bright green filamentous algae growth
April 28 2021
Southeast Lobe
Bright green filamentous algae growth
April 29 2021
Southern (Entrance) Lobe
Filamentous algae growth turned brown on surface due to algaecide spraying the day prior
April 30 2021
Southern (Entrance) Lobe
Filamentous algae growth
Dead? Brown surface algae in some sections
April 30 2021
Southeast Lobe
Bright green filamentous algae growth
Dead? Brown surface algae in some sections
May 1 2021
Southeast Lobe
Bright green filamentous algae growth
Dead? Brown surface algae in some sections
Small grey dying? blue-green algae build-up
May 2 2021
Southeast Lobe
Bright green filamentous algae growth
Dead? Brown surface algae in some sections
May 2 2021
Southern (Entrance) Lobe
Submerged filamentous algae growth
Dead? Brown surface algae in some sections
May 3 2021
Southern (Entrance) Lobe
Submerged filamentous algae growth
Red-Brown water - "Prorocentrum minimum" algae present
May 3 2021
Southeast Lobe
Bright green filamentous algae growth
Dead? Brown surface algae in some sections
May 4 2021
Southeast Lobe
Bright green filamentous algae growth
Dead? Brown surface algae in some sections
May 4 2021
Southern (Entrance) Lobe
Submerged filamentous algae growth
Red-Brown water - "Prorocentrum minimum" algae present
May 5 2021
Southeast Lobe
Bright green filamentous algae growth
Dead? Brown surface algae in some sections
May 6 2021
Southeast Lobe
Bright green filamentous algae growth
May 8 2021
Southeast Lobe
Bright green filamentous algae growth
Red-Brown water - "Prorocentrum minimum" algae present
May 9 2021
Southern (Entrance) Lobe
Bright green filamentous algae growth
Red-Brown water - "Prorocentrum minimum" algae present
May 9 2021
Southeast Lobe
Bright green filamentous algae growth
May 10 2021
Southeast Lobe
Bright green filamentous algae growth
May 13 2021
Southern (Entrance) Lobe
Grey/White dying? blue-green algae streaking
Bright green filamentous algae growth
May 13 2021
Southeast Lobe
Bright green filamentous algae growth
May 15 2021
Southeast Lobe
Bright green filamentous algae growth
Grey/Brown dying? blue-green algae streaking
May 16 2021
Southern (Entrance) Lobe
Submerged green algae growth
Red-Brown water - "Prorocentrum minimum" algae present
May 24 2021
Southern (Entrance) Lobe
Submerged green algae growth
Bright Green Floating Filamentous Algae
Red-Brown water - "Prorocentrum minimum" algae present
May 24 2021
Southeast Lobe
Bright Green Floating Filamentous Algae
Red-Brown water - "Prorocentrum minimum" algae present
May 25 2021
Southern (Entrance) Lobe
Submerged green algae growth
Bright Green Floating Filamentous Algae
Red-Brown water - "Prorocentrum minimum" algae present
May 25 2021
Southern (Entrance) Lobe
Submerged green algae growth
Bright Green Floating Filamentous Algae
Red-Brown water - "Prorocentrum minimum" algae present
May 25 2021
Southeast Lobe
Bright Green Floating Filamentous Algae
Red-Brown water - "Prorocentrum minimum" algae present
May 26 2021
Southern (Entrance) Lobe
Submerged green algae growth
Bright Green Floating Filamentous Algae
Dead? Brown surface algae in some sections