8,500 € investment in (waste) water infrastructure per inhabitant and year by 2045 in Saxony
By the way, these are only the costs in Saxony and they are “quite positive”. In other federal states, it will probably be significantly more expensive. The average investment requirement per capita in Germany is around €10,000.
Photo: https://www.pexels.com/de-de/foto/badezimmer-4k-toilette-verlassene-gebaude-5357023/