I would guess it to be a common water snake. Water Moccasins have bodies that are VERY thick and heavy for their length, and short, thick tails. This snakes head doesn't look like a venomous snake.
Sweet. Im not too good at snake identification. After the dog was sprayed by a skunk last night I was not ready for more animal adventures.
The only thing I know is to tell if it poisonous is look at the eyes. Round eyes non-poisonous. Slated, go the other way.
Growing up I was told if the snakes head is as wide as it is long to stay away from it. I still go by that rule. Lucky for me there’s not a lot of venomous snakes around here.