As highlighted by an expert speaking at a recent Lake Wentworth Watershed Association workshop, we need to start spending more time looking at the whole watershed. The focus for a long time has been on the shoreline properties. But increasingly studies show that much of the pollution comes from higher in the watershed.
For example, it's great if the shoreline property has upgraded their septic and stopped using fertilizer, but if 5 properties upstream have bad septics, their stuff ends up in the lake too. Not to mention farms, golf courses, etc. that are also in the watershed.
https://www.nhpr.org/2023-06-19/clim...ria-prevention
https://www.youtube.com/watch?v=Z0UdbLhrGcU (start watching at 1:05:00)