Fat in a Sink, Wipes in a Loo—How Fatbergs Are Born


The most disgusting thing you’ve never heard of is haunting sewers around the world. Fatbergs, as they’re called, are deposits of fat and grease mixed with non-dissolvable waste. Each one is a profile of what urban denizens are improperly flushing down toilets and pouring down sinks. Increasingly, they are trouble for sanitation systems, which bear the burden of removing them so sewage can flow freely to water-treatment plants.