Sewer flooding

Every year, South West Water has to clear up to 6,000 blockages in its sewers.

Thousands of litres of waste fat, cooking oil and grease (FOG) are poured down sinks by householders who are unaware of the problems it may cause. The hot fat, oil and grease cools quickly to form a solid mass which can build up in pipes and block the sewerage system.

At best the only noticeable effect of a blockage will be that drainage systems are not working effectively, but it is possible that some customers could have their home or garden flooded with sewage which is a very distressing experience.

South West Water spends over a million pounds a year to remove up to 3,000 tonnes of solidified fat from the sewers; the equivalent volume to 21 double-decker buses.

Fat in sewers attracts vermin and if a blockage results in pollution of rivers and streams, it can also have a damaging impact on the environment.

What's the best way to dispose of FOG?

Domestic kitchen FOG discharges are typically cooking oil, animal fats and food debris largely from washing up activities. As an alternative to pouring fat down the sink, the best method is to dry wipe your crockery before washing up to get rid of any residual fat or food. Any left over cooking fat should be emptied into a container such as a fat trap. This sealable plastic tub can collect fats and oils whilst it cools and solidifies. Its content can then be disposed of in the bin or alternatively in the case of non-poultry fat, you could make a bird cake by adding seeds.

For business customers who want to find out more go to Fats, oils & grease