Prepared by GreaseTrapLocator · Fact review: October 17, 2026
The first five minutes
- If sewage backs up into the restaurant, close the food establishment immediately as a precaution and contact the health authority for instructions on cleanup and reopening.
- Stop use of affected sinks, drains, dishwashing, and other connected fixtures.
- Keep employees, customers, food, utensils, packaging, and clean equipment away from the affected area.
- If there is immediate danger, call emergency services.
- Contact the applicable sewer utility and public-health authority, then the property contact and qualified contractor.
- Follow the authority's directions for closure, food disposition, cleanup, repair, and reopening.
The FDA Food Code is a model code, not a nationwide law. Its sewage-backup provision illustrates why a business should not invent its own keep-open workaround. The adopted local rule and regulator control.
Contain access, not the contamination
Block people from the area and prevent material from reaching storm drains or unaffected spaces without touching or spreading it. Do not enter a trap, open a vault, choose respiratory protection, or follow a generic kitty-litter or floor-stripping recipe for sewage-contaminated material. Use the authority's cleanup direction and qualified personnel.
Document without delaying calls
Record the time, affected fixtures and areas, who stopped operations, authority reference numbers, contractor, photos, food/product disposition, cause assessment, repair, cleanup direction, and written reopening approval. Document only what you can see safely.
Find and correct the cause
An overflow can involve a full device, blocked or damaged piping, failed components, downstream sewer conditions, improper fixture use, or more than one problem. Pumping alone is not proof that the system is repaired. Obtain a qualified cause assessment and keep the records.
Official sources used
U.S. Food and Drug Administration
Section 8-404.11 lists sewage backup among emergencies where an imminent health hazard may exist, requiring the permit holder to immediately stop operations and notify the regulatory authority (unaffected areas may keep operating); section 8-404.12 requires the authority's approval before resuming.
2026 Food Code · reviewed October 17, 2026
Seattle Public Utilities
Seattle requires cleaning per the manufacturer's specifications; if they are not available, no more than 25 percent of an interceptor should contain food or FOG buildup. It prohibits emulsifying agents, enzymes and bio-additives in interceptors, and says a business with a backup into the premises should immediately close and contact Seattle-King County Public Health.
Fats, Oils, & Grease: Commercial Kitchens · reviewed October 17, 2026
U.S. Environmental Protection Agency
FOG can solidify, reduce sewer capacity, and block flow; 40 CFR 403.5(b)(3) prohibits solid or viscous pollutants in amounts that obstruct flow and result in interference; local programs establish controls.
Controlling Fats, Oils, and Grease Discharges from Food Service Establishments · reviewed October 17, 2026
U.S. Occupational Safety and Health Administration
Smell is not a reliable warning. Evaluate hydrogen-sulfide and confined-space hazards and apply the monitoring, training, entry controls and respiratory protection required by the applicable standards and site assessment.
Hydrogen Sulfide: Evaluating and Controlling Exposure · reviewed October 17, 2026
Frequently asked questions
Can the restaurant keep operating during a sewage backup?
Do not make that decision from a generic web guide. If sewage backs up into the restaurant, close the food establishment immediately as a precaution and contact the health authority for instructions on cleanup and reopening.
Who should we call first?
Call emergency services for immediate danger, then the applicable sewer utility and public-health authority, followed by the property contact and qualified contractor.
Should staff clean the overflow?
Do not improvise sewage-contamination cleanup. Isolate the area and follow the public-health authority and qualified cleanup process.
When can the restaurant reopen?
Reopen only after the required repair, cleanup, inspection, and approval under the controlling local rule.
Author: Grease Trap Locator Editorial Team
The Grease Trap Locator editorial team covers FOG compliance, grease trap maintenance, and commercial kitchen regulations across the US and Canada. Our guides are written for restaurant owners, facility managers, and food service operators who need practical, accurate information without the fluff.
Find local contractors who handle cleaning, pumping, and FOG compliance — in your area.