Fats, Oils, and Grease (FOG) – Keep Them Out of the Drain

Please remember that when fats, oils, and grease (known as FOG) go down the drain, they don’t just disappear. As they cool – particularly during the autumn and winter holidays, when the outside weather becomes colder – they harden inside our pipes and sewer lines, sticking to the walls and trapping food scraps and other debris. Over time, these build-ups cause clogs, sewer backups, and even massive “fatbergs” that can damage our sewer system and environment.

Plus, they can even lead to an increase in your utility fees!

Why FOG is a Problem

• Clogged pipes and backups – Hardened grease blocks the flow of wastewater, which can cause sewage to back up into homes, businesses, and streets;
• Higher costs for everyone – Clearing FOG blockages requires expensive emergency repairs. These costs affect customer rates and city budgets;
• Environmental harm – Overflows from clogged pipes can spill untreated sewage into local streams, rivers, and lakes, threatening wildlife and public health.

What You Should Do at Home

• Do pour cooled fats, oils, and grease into a sealed container, then place them in the trash;
• Do wipe greasy pans and dishes with a paper towel before washing;
• Do scrape food scraps into the garbage or compost, not down the sink;
• Do recycle used cooking oil at approved collection sites where available;
• Don’t pour bacon grease, fryer oil, or pan drippings down sinks or toilets;
• Don’t flush wipes, even the ones that companies claim are “flushable;” they combine with FOG to form clogs and blockages.

For Restaurants and Food Businesses

Food service establishments are major contributors of FOG and are required to use grease traps or interceptors.

• Install and properly maintain grease control equipment;
• Dry-wipe pots, pans, and plates before washing;
• Store used cooking oil in labelled containers for recycling;
• Train staff on best practices and keep disposal logs for inspections.

Protecting Our Community Together

Every household and business can help keep our sewers flowing freely. By keeping FOG out of the drain, you can prevent costly repairs, protect our water environment, and keep public health risks low.

For more information, recycling locations, or guidance for your business, please contact FOG@awwd.com or call (425) 743-4605 and ask to speak with someone in AWWD’s Wastewater Treatment Facility solid waste department.