Smoke Testing

EST has experienced field crews to perform smoke testing throughout the Northeast. In order to identify defects or cross connections in sewer lines, EST uses a non-toxic smoke that is forced into the sewer using high-powered blowers. Breaks in the sewer allow the smoke to escape. Ordinarily, one line segment upstream and downstream of each manhole is tested at a time. EST’s services include a door hanger notification program and detailed field log documentation.


Common Smoke Testing FAQs

What are EST technicians looking for when performing smoke testing?

EST’s crews are looking for anything that allows rain water access to the sanitary sewer system.

When and how will the work be scheduled?

Smoke testing is typically performed during dry weather periods in the summer and fall.  EST technicians will alert residents typically one week prior to smoke testing by delivering door hanger notifications.

How will EST’s field crews identify themselves?

EST’s work crews will be in company marked vehicles wearing EST uniforms and company ID badges. 

What kind of data is collected during smoke testing?

Line sections for each set up will be documented with findings, photos, and lengths of pipe tested. Positive findings will be given a drainage area and measurements will identify the sources location. 

What health and safety precautions are taken when performing smoke testing?

A non-toxic non-staining screening smoke is used to find leaks and confirm direct connections to the sanitary sewer.  Though non-toxic but may still affect residents with asthma/emphysema/difficulties breathing if it enters their household.  In this event, it is recommended the affected person(s) be moved outdoors where there is fresh air.  The smoke is not harmful to pets and residents can still use their water while tests are being performed.

New England Office

51 Fremont Street Needham, MA 02494

Mid-Atlantic Office

127-G Gaither Drive Mount Laurel, NJ 08054