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Common Problems

7 Signs of a Hidden Sewer Line Leak

Published July 27, 2026 · 5 min read

A sewer line leak often hides underground for months, quietly causing damage. Catching it early saves your foundation, your yard, and a lot of money.

Watch for These Signs

  • Patches of lawn that are greener or grow faster than the rest
  • Soggy, sunken, or foul-smelling spots in the yard
  • Sewage odor indoors or outdoors
  • Unexplained increases in pests like rodents or insects
  • Cracks appearing in the foundation or driveway
  • Mold or mildew in the basement with no obvious source
  • Drains that are slow despite cleaning

Confirm It With a Camera

These signs point to a leak, but a camera inspection pinpoints the break so the repair is exact. The sooner it's found, the smaller the damage — and the repair.

Need help with this in your home? NJ Sewer Guy serves all of New Jersey with 24/7 sewer and drain service. Call 973-793-1910 or request service online.