Usually because sewage is escaping somewhere outside: a cracked sewer line leaking into the soil, or a cleanout with a missing or broken cap. A roof vent can also push sewer gas down into the yard on still days. A camera inspection shows whether the source is your line or somewhere else.
The sewer line from your house to the city main runs under the yard. When a joint separates or the pipe cracks, wastewater seeps into the surrounding soil, and the smell rises through it. Cleanout caps get clipped by lawn mowers or crack in the sun, which leaves an open pipe to the sewer at ground level.
In DFW, a sewage smell in the yard often shows up alongside soft or wet patches or unusually green grass over the line, and it gets worse after rain. Summer drought cracks North Texas clay and opens new paths for the smell.
Not every yard smell comes from your pipe. A neighbor’s line, a city main, a storm drain, or a nearby pond with low water can all smell like sewage. Check the cleanout cap first, since it is cheap to replace. If the cap is intact and the smell stays near the line, the camera shows if your side is leaking.
Nuflow DFW is a licensed trenchless sewer contractor serving 25 Dallas-Fort Worth cities, RMP# 46694. Our camera inspection finds leaks in the line under your yard, and a pipe repair closes them. You keep the footage. Call (469) 701-0597.