That depends on what you call good vs. bad. Table Rock is very clear which indicates very good water quality. The clear water is a result of low nutrient levels limiting the amount of algae that can grow, and algae is the base of the aquatic food chain, everything on up ultimately depends on algae for food directly or indirectly. Adding nutrients will increase the amount of algae that can grow, which will ultimately increase the amount of fish the lake can produce. Of course, that's up to a point, there is definitely such a thing as water that is too nutrient rich for good fishing and good aesthetics. Table Rock's clear water is what draws a lot of people to the area. A lot of people are working very hard and spending a lot of money to keep the nutrient levels in Table Rock at or lower than where they are now. Phosphorus is the biggie. Flood waters also temporarily cause a major increase in the bacterial content of the lake water. That is definitely not good but that problem is pretty will self limiting as time, temperature, oxygen and sunlight fairly quickly naturally reduce the bacteria content back to normal. Does that help?