Sewer Rehab

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In 2004, the City established a formal program to address our aging sewer system, which consists of about 1,400 miles of sewer lines within Greensboro city limits. The goal is to tackle one percent of our system each year.


Greensboro's first sewer rehab project took place in 1995 and consisted of slip-lining almost two miles of sewer pipe. Since then, the City has rehabbed more than 130 miles of sewer lines.

Interactive map of upcoming
sewer rehab projects

Rehab Process

Many factors are considered in determining locations for sewer rehabilitation. Prioritization includes factors such as:

  • Inflow and infiltration (excess stormwater and groundwater coming into the sewer system)
  • Sewer capacities
  • Age and material of the line
  • Maintenance history
  • Road surfacing priorities.

Sewer evaluations often have several steps that include:

  • Installing flow monitors in manholes to identify areas where there is inflow and infiltration
  • Conducting smoke tests to identify where inflow and infiltration is coming from
  • Running closed circuit television cameras (CCTV) through pipes to determine what condition they are in.

What you may see in your neighborhood during smoke testing is smoke coming up from manholes. The smoke is non-toxic, non-staining, white to gray in color, has a slight odor, and creates no fire hazard.

Sewer Rehab Methods
Cured in Place
Dig & Replace


How Rehab Affects You
Notification of Scheduled Work
Safety Issues
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