Q.Peach tree
Our peach tree started to producing fruit. Every day any peach that matures to about an inch or more falls from the tree branches. We are officially in a drought. We do water by hand at least four days a week early morning or evenings​. Thanks, Carey
This article describes some of the common reasons for small peaches to fall off the tree:
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-fruit-drop.htm
I am not sure what is causing the brown patches on the fruits in the picture, but it could potentially be peach anthracnose or another one of the diseases listed on this site:
http://extension.psu.edu/plants/tree-fruit/diseases/stone-fruit-diseases