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, Mainz's public utility company is expanding the city's wastewater treatment plant with a fourth treatment stage.
Following an initial grant approval of €6.5 million last year, Climate Protection Minister Katrin Eder has now presented Mainz Economic Development Agency with a second grant approval of €4 million. This means that the state of Rhineland-Palatinate is supporting the measure with a total of €10.5 million, which corresponds to around 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.
