Sewage treatment plant
The Mainz district of Mombach is not only home to our company headquarters, but also to the central sewage treatment plant. An average of 45 million liters of wastewater are treated there every day in three stages (mechanical, biological, chemical) so that it can then be pumped back into the Rhine.
We work around the clock to achieve this, using state-of-the-art technology and optimal use of raw materials. This is the only way to not only comply with the legal limits, but even to fall below them.
But that's not all ...
... Of course, we also keep an eye on costs and the environment. For example, we generate a large portion of the energy we need ourselves. This is one of the reasons why Mainz’s wastewater fees are among the lowest in the country.
And our wastewater treatment plant was the first in Rhineland-Palatinate, Hesse, and Saarland to be awarded the EMAS certification under the EU Audit Regulation. This is tangible proof that “environmentally friendly” is not just a buzzword for us.
In addition, with support from the state of Rhineland-Palatinate, we are currently constructing a fourth treatment stage, which is scheduled to go into operation in 2027—you can find more information here.
Would you like to take a closer look? We’d be happy to show you—you can find more information about guided tours here.


