4th purification stage
26.5.2025: Second funding decision received from the state
Mainz’s wastewater is set to become significantly cleaner. To this end, Wirtschaftsbetrieb Mainz is expanding the city’s wastewater treatment plant with a fourth treatment stage.
Following an initial grant award of 6.5 million euros last year, Climate Protection Minister Katrin Eder has now presented Wirtschaftsbetrieb Mainz with a second grant award of 4 million euros. With this, the state of Rhineland-Palatinate is supporting the project with a total of 10.5 million euros, which corresponds to approximately 30 percent of the total costs.
The fourth treatment stage will enable even better filtration of trace substances from wastewater in the future, i.e., minute pollutants such as pharmaceuticals, cosmetics, and pesticides.
Commissioning is planned for 2027.
