Foul smell in some Madison homes caused by CIPP project

The City of Madison began receiving reports this week of a chemical smell in homes near the Cured-In-Place Pipe Improvement project area. The odor enters homes through dry sewer traps, so it can be mitigated by simply running water down all traps to ensure they are full of water. 

The smell is caused by an ingredient in the resin used during the lining process. This ingredient is a component of many household products, such as craft supplies, nail polish, Styrofoam food containers, and even sunscreen! This smell is very sensitive to the nose due to a very low smell threshold of 0.1 parts per million, but it is not harmful at the levels generated by the CIPP process. 

If you are already experiencing odors, it is suggested that you open your windows for ventilation.