The toilet facilities have various hygiene problems that are often overlooked at first glance. One of these problems is the so-called splash effect. Never heard of it? No problem, read on and learn more about it and how the “problem” can be remedied.


Splash effect – The problem

We speak of the splash effect when the toilet flush is set incorrectly so that small splashes come out of the toilet (hence “splash”). The flush water can contain bacteria from our excrement, which can then spread. The splashes can spread not only on the seat ring but also around the toilet. In the worst case, the toilet paper that hangs in a dispenser that is mounted too low gets caught. Spare rolls are also usually placed very inconveniently, for example on the left or right side of the toilet bowl below the seat. Paper provides an ideal breeding ground for bacteria to multiply. This is hardly noticeable, but it is not without danger and it is disgusting.

The following video illustrates this problem:

In addition, the problem was analysed by a project group at Harvard Medical School. Here is the result:

The bacterium

Various researchers and project groups have analysed this problem. The bacterium found is called “Clostridium difficile” and can cause devastating diarrhoea. It is combated with an antibiotic. The use of antibiotics damages the intestinal flora, which in turn can lead to abdominal pain and fever. So this is a very serious problem.


Problem – Solution

Probably the simplest solution (as mentioned in the video) is to close the toilet lid before flushing. This protects the seat ring and its surroundings from water splashes. However, the lid is still not protected from splashes. Therefore, the lid should also be cleaned and disinfected thoroughly.

In order to counteract the splash effect even more, greater expertise will help.

  1. Use detergents more regularly

These kill a large part of the bacteria in the rinse water.

  1. Check water level

If the water level is too high, the splash effect will be even stronger. A water level that is too low can also increase the effect if the refill water quantity is set too low. We recommend seeking the help of an expert for this.

  1. Check tank

These days, most tanks are concealed and therefore not visible. If this is not the case, the tank must be checked and repaired/cleaned if necessary. This problem may not be visible at first glance, but it can still have consequences. For this purpose, specialised companies offer professional cleaning of the cistern as well as the toilet

  1. Adjusting the flushing process

The longer the flush, the higher the risk of the splash effect. At the same time, a shorter flush setting can have a positive effect on water consumption.



The splash effect is a serious problem, especially in public and semi-public toilets. We recommend checking the above points to keep hygiene in and around the toilet as high as possible.