What is illegal under New York City laws regarding grease disposal?

Under New York City laws, dumping grease in any sink without a proper grease interceptor is illegal because it poses significant risks to the city’s sewer system. Grease can cause blockages and overflows in the sewage system, leading to environmental hazards and costly repairs. Regulations are in place to ensure that grease is managed properly; this includes the requirement that food service establishments install grease interceptors that effectively capture and separate grease before it enters the city's sewage system. This helps to maintain the integrity of the infrastructure and prevent public health issues related to sewer backups.

In contrast, using designated grease interceptors is not only legal but mandated to ensure safe disposal. Recycling grease and using it for biodiesel production are also actions that are encouraged under certain guidelines, as they contribute to sustainability and waste reduction efforts.