The answer to 'my septic tank smells bad' is that a foul odor coming from your septic tank is a common issue that can have several underlying causes. The most common reasons for a smelly septic tank include a full or clogged tank, a broken or damaged septic system, or improper maintenance.
Some of the typical symptoms of a smelly septic tank include a strong rotten egg or sewage-like smell near the septic tank or drainfield, slow draining sinks and toilets, and pooling water around the septic tank or drainfield. In most cases, this problem requires professional attention from a licensed septic service technician to properly diagnose and resolve the issue.