Joined: Aug 2010
Posts: 4956
Cows
6/15/2020 at 12:30 PM
I wouldn’t worry to much about the cows, if it’s phosphates that your worried about you should realize that any plant that grows along, or in a waterway takes up phosphate to grow, and when that plant dies the phosphates end up in the water, same goes for erosion along waterways, the soil is naturally full of phosphates which if eroded into the water raises phosphate levels.
The same story goes for nitrogen.
This is the reason for elevated levels of both following high water events.
Now we could look at pathogens like e-coli, they are present in the gut system of just about everything, so deer, foxes, ducks or likely even fish contaminate water.