Our house has smelled like sewage for almost a year. It’s intermittent but happens most days. It seems to be coming from the vents. Worse at night which may coincide with using the bathtub but it has smelled without using the bath as well.
Key points
- kitchen renovation 1 year ago
- on well and septic
- hvac checked - no issues -plumber checked, did a peppermint test, no issues
- septic pumped and checked no issues
- vents cleaned, no issues
- we live in Maryland
- smoke test performed today by American Leak Detection. Their only recommendation was to replace a Studor Valve under our sink (but smell is not coming from there) and replace the lid to our septic outside bc it seemed to

