To dream of a sewer represents issues or situations that you find most objectionable. A sense of how vile or putrid a problem or old relationship is.
Issues that you care about never having to think about again. Not wanting have to notice things you believe are over with. Negativity or problems you feel have been dealt with or are too old to be important.
Example: A man dreamed of seeing an evil person looking around a sewer. In waking life he was in therapy and being forced to examine negative events from his past that he didn't want to talk about. The therapist kept bringing up issues from his old journals that made him angry.
Example 2: A man dreamed of seeing his father sucked into a manhole going deep into the sewage. In waking life his father had died of a drug overdose. The sewer represented how objectionable and wasteful he felt his father's addiction was.
Example 3: A young virgin girl dreamed of walking through a sewer dripping with sewage. In waking life she had been forced to watch a boy ejaculate in front of her.
*Please See Sewage