To safely dispose of gasoline spilled in a sewer, first stop the leak by containing the area with non-flammable absorbents like sand, cat litter, or commercial absorbent materials. Avoid using water, which can spread the gasoline. Collect the absorbed material in a sealed container and dispose of it as hazardous waste at a designated facility. Report the incident to local environmental authorities or utility providers to ensure proper cleanup and prevent further environmental harm. Do not pour gasoline down drains or storm sewers, as it can contaminate water systems and harm aquatic life.

The steps above are critical because gasoline contains toxic hydrocarbons that degrade water quality and endanger ecosystems. The Environmental Protection Agency (EPA) estimates that improper disposal of automotive fluids, including gasoline, accounts for 10% of all household hazardous waste in the U.S., contributing to 17 million gallons of annual oil and gasoline spills. When gasoline enters sewers, it bypasses treatment facilities and directly flows into waterways, where it reduces oxygen levels, suffocates aquatic organisms, and increases cancer risks in nearby communities. For example, a 2020 study by the American Chemical Society found that even small gasoline spills (less than one gallon) can persist in water for months, bioaccumulating in fish and soil. Containing spills immediately prevents contamination from spreading, while hazardous waste disposal ensures toxic materials are treated by licensed facilities equipped to neutralize or recycle pollutants. Local authorities often mandate reporting to comply with the Clean Water Act, which penalizes violations that harm public water resources. Adhering to these protocols protects public health, wildlife, and regulatory compliance.