Violence is gory and pretty graphic. The series contains grossly dusturbing images.
The show is too heavy for a TV-14, much like the first 3 seasons of The walking dead.
The violence in this show is mostly portrayed with blood splatters and killings just off the screen or quickly edited so no gore is shown, with the occasional aftermath. There are many exceptions, though, such as all slingshot kills, which show parts of the head actually being blown off. Z nation's episodes will probably increase in graphic nature if the series starts to earn a higher budget.
All of the zombies have blackened blood and dead faces, most with dead-eye contact lenses.
There is the occasional shot of zombies feasting on bodies, including lots of blood and some holes/wounds on the corpse.
There are many Stabbings, mostly just off camera or with the actual object not shown entering the skull. Blood splatters are always present. Once in a while though, the actual stabbing is seen.
Many shootings, blood and small bursting wounds sometimes seen.
Zombies are seen on fire.
People hit each other.
Many people are seen bloody with body parts missing. They are hung from the ceiling with bandages covering them. This is very disturbing but not very graphic. (Philly Feast)
Many zombies are crushed by a rolling object, leaving behind guts and limbs.
People Beat and shoot each other.
A man is betrayed. He is tazed and knocked out.
People are tazed in various places (mouth, wrists, stomach) no blood, obviously, but still violent. (Philly Feast)
A zombie is seen grounded up and jammed in a car wheel. It is than stabbed. This scene is somewhat played for laughs, but is still very graphic.
Zombies are hit and run over by cars. Blood and gore seen.
Gruesome scars are seen on a character.
Zombie's heads are cut in half, and completely off, onscreen.