The WHOLE season is safe!!! There was only a couple possibly triggering parts (and still, no one v*)
Episode 3 - 7:59-8:40 character named Kevin g* as if he is about to p* but it is an exorcism of a demon. The demon then comes out his throat (CGI). May be triggering to some. (Found this on emetophobiahelp)
Also in the diner episode, a woman asks her husband if his food is going to make him sick but nothing happens
Season 1 Episode 11- in the first segment a cat has kittens and her owner puts them in a bag to drown them. You see him shoving a brick in with them and throwing them into water, then the cat talks at length about feeling them dying and struggling. It’s quite upsetting even though you don’t really see anything.
In the first episode Alex (a confirmed gay man who grew old with his partner Paul) dies after the sandman is freed and kills him by "giving him the gift of eternal sleep" in his dream
S1 E6, Death speaks to a man and tells him that his time is up. Suddenly his wife can't see him – then it is heavily implied that he drowned, as some people pull his physical body out of the water, limp.
No explicit drowning is shown, however.