DeKalb County Department of Watershed Management will be smoke testing the sewer system from March 19 through April 20. The testing will take place at various locations throughout the City of Decatur.
From the Watershed Management notice:
This will enable us to detect any defects in the sewer system. You may experience smoke escaping throughout your sewer inside the house, do not be alarmed. In the event (which is extremely rare) this does occur the smoke is harmless, just open a window and it will escape the house.
For more information, please contact the DeKalb County Department of Watershed Management at 770-621-7230.