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When engaging in technical discussions with municipal officials regarding the impact of food waste disposers, what often comes up is a concern about FOG — fats, oils and grease. Wastewater treatment managers, especially those overseeing sewage collection systems, deal with FOG blockages as part of routine maintenance. These deposits are listed by the US EPA as a major contributor to blockages that cause sanitary sewer overflows, a public health risk. Incidentally, FOG deposits are seen in sewers around the world, including countries where disposers are not as widespread as in the US.

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