Pond Boss Forums INTRO Questions & Observations Muddy water!

Hi,
my 1/2 acre pond is in northern arizona in the pine trees. it was dug about 2 years ago and is finally full with no leaks. But one major problem the water has been always muddy!!!!
it is generally 13 ft deep and in some areas 8 to 2 feet deep.
anyone know why it is so darn MUDDY?

(btw visiblity is about 2inches)

Thanks in advance,
ArizonaGary