There is a commercial service to measure the lake for cyanobacteria and the phosphorus levels that can cause it. This would show if the Bear Island occurrence is isolated or if there is a wide spread problem. Bluewater Satellite
http://bluewatersatellite.com/Cyanobacteria.html uses data from the Landsat sensors for the analysis, and provides five readings per acre.
Moultonborough used the service last year to measure phosphorus in its waters and discovered new areas of elevated phosphorus. Based on that data, it added new monitoring points to the Lay Lakes water sampling program, done in cooperation with UNH.
There was a clear sky satellite pass on June 21’st that could be used for an analysis. Bluewater will analyze the phosphorus and cyanobacteria for the whole lake (about 46,000 acres) for $7900. This would allow DES to focus testing resources on areas of the lake where there is already cyanobacteria, and start looking at high phosphorus areas for potential causes. The problem, of course, is that DES does not have the budget for this, only for spot testing or where people report a problem. If any of the Winnipesaukee area organizations wants to peruse this, please send me a private message to discuss how to proceed.