Stop sewer gases from entering the building.

Healthy House^TM CleanAir Tip

Sewer gases originate from decomposing mater in the public or private sewer, drainage or septic systems. Sewer gases can include methane, hydrogen sulfide, ammonia, carbon dioxide, nitrogen oxides, and sulfur dioxide. Many of these gases have toxic effects on occupants of a building. Sewer gases gradually displace oxygen, cause odors, or could lead to fire or explosion. In many cases, intruding sewer gases are caused by evaporation of the water barrier in drain traps. They can also originate from drain tile systems. Buildings should be tested for sewer gases and any intrusion problems should be analyzed and fixed.