Lake Hopatcong gets 1st HAB Treatment - Landing Area may be Murky

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After almost a year of fighting for assistance the Lake Hopatcong Foundation and the Lake Hopatcong Commission both announced this week the first set of many treatments happening around Lake Hopatcong as the result of the $500,000 grant.

Landing Channel gets Phoslock Treatment

Murky Water TreatmentPrinceton Hydro, with an expected date of June 15, will begin treatment of Landing Channel with a phosphorus inactivating technology called Phoslock. This marks the first project to be implemented under the NJDEP HABs Grant awarded to the Lake Hopatcong Commission in partnership with the Lake Hopatcong Foundation. The purpose of this project and all projects initiated under the grant is to evaluate innovative technologies to control, prevent, or mitigate HABs on Lake Hopatcong.  Treatment is expected to take approximately one week dependent on weather conditions.

What is Phoslock?

Phoslock is a clay-based nutrient inactivating technology developed by the Australian national science agency, which binds with phosphorus in the water column or in lake sediment. Once phosphorus is inactivated it is unavailable as a vital nutrient for algal growth. By limiting algae and cyanobacteria which can produce cyanotoxins we hope to reduce the likelihood of HABs on the lake.  Phoslock is applied as a slurry and sprayed from a boat.  The slurry will temporarily make the water appear turbid but should disperse 2-6 hours after each treatment.  Phoslock application requires a permit from NJDEP prior to use.

Where as Phoslock been Used Successfully?

Mason Regional Park, USA

masen 200x110Mason Lake, California had chronic water quality and blue-green algae issues impacted the health and enjoyment of the waterbody. The lake management firm AquaTechnex selected the proactive solution of Phoslock to address the high levels of phosphorus (water & sediment) and Reset the ecological clock of this lake. The Phoslock application resulted in a 45% reduction in total phosphorus one month after application, a reduction of ortho-phosphorus below limits of detection for 4 months following application and improved water clarity by 4 feet. This first operational application in the United States confirmed the international successes of Phoslock programs and demonstrated the impressive ability of this patented technology to bind phosphorus and restore water quality.

Clatto Reservoir, Scotland

clatto5 213Clatto Reservoir is a former drinking water supply reservoir located on the outskirts of the city of Dundee in Scotland.  In recent years, the reservoir has been used for a variety of recreational purposes, however blue green algal blooms during summer months have become more common, causing the reservoir to be closed for extended periods of time due to concerns about public health and safety

Keen to find a solution to this problem, the Dundee City Council commissioned an application of Phoslock. The application was to remove the immediately and potentially bio-available phosphorus from both the water column and sediments of the reservoir so that there would be less phosphorus available for further algal growth.  The results of the application have been impressive and the reservoir remained open to the public for the first time in several years during the peak summer period of June to August as a result of substantially lower blue green algal cell counts.

What Other Treatments are Happening on Lake Hopatcong?


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