- For life threatening flooding emergencies, dial 911.
- For all sanitary sewer emergencies and after-hours storm drainage emergencies, call the 24-hour Trouble Response Center at 703-323-1211 or 703-239-8444, TTY 711.
- For storm drainage emergencies during regular business hours (Monday - Friday, 7:30 a.m. - 4:00 p.m.), call the Maintenance & Stormwater Management Division at 703-877-2800, TTY 711.
Sanitary sewers collect sewage and pipe it to a treatment facility. It is a system accessible through manholes, many of which say "Fairfax County Sanitary Sewer." If flooding is due to a backup from a floor drain in your home, especially if there is a sewage smell, it most likely involves a sanitary sewer. The storm drainage system is designed to collect rain water. Unlike the closed sanitary pipe system, it is an open system consisting of pipes, manholes, ditches, curb inlets, yard inlets, swales, outfalls, etc. A storm drain manhole often will say "Storm" or "VDOT."
If the flooding involves a road, call the Virginia Department of Transportation at 703-383-8368, TTY 711. If it involves a house, other building or property, contact the Maintenance & Stormwater Management Division for assistance at 703-877-2800, TTY 711 or by using the Storm Drainage Flooding Report Form. Also see Storm Drainage and Stormwater Facilities or Floodplains for more information.