Hopkins Pond Restoration Using Underwater Aeration and Artificial Floating Wetlands Mike Haberland County Environmental Agent Rutgers Cooperative Extension 856-216-7130 x3 [email protected] A beautiful pond in the spring… can become a cyanobacteria soup in the summer from high levels of nutrients Microcystin level = 416 μg/l WHO drinking water = 1μg/l Conditions favorable for cyanobacteria blooms Hopkins Pond, NJ Warm, calm water Elevated nutrients – PO4 = 0.126 ppm (impaired is >0.05 ppm) Water stratification – anaerobic hypolimnion Low inflow – base flow in summer averages ~40 gpm Underwater aeration to create water column circulation Aeration layout for Hopkins Pond, NJ Diffuser membrane with 500 – 1000 micron holes Weighted air line Air compressor Deploying air line