They used to dump Conway city sewer in a creek that ran into it was told. A few years back I saw on the news where officals flew over and used infer red photo to find septic problems from houses around the lake and made them repair ? I prefer not eat eat fish from most shallow woody lakes near towns or surrounded by farm land because of lower water quality or containation . But nothing is sqeaky clean these days . Even Lakes like Nimrod where it is fed by mountain streams and no big cities has been found to have mercury containation in the fish . You never know what is in any waters because Forest Service , timber companies , farmers , and individuals have used chemicals like herbicides and pesticides . Runoff from livestock and septic systems. We have had in years past wood treating plants in remote spots that had runoff problems . Nothing is 100% free of contamintion in our modern world .
Prime example a couple years back we had a bad green algea bloom which shut down swimming in Nimrod . Most could not understand why it happened . When you have a high nutrient load hit the water is causes a algea bloom . This mostly likely human or animal wastes . It just so happened we had a large rain in July . Local farmers spread animal wastes such as Poultry litter , hog manure ,and cattle manure on hay fields alot during summer . If we get a big rain about the same time it can get washed into streams and into our lakes .