The article discusses the play 'Dat Wasser vun Kölle es jot', being performed at Schauspiel Köln, which tackles the historical contamination of the Rhine river and the current state of its water quality. It recalls a time in the 1970s and 1980s when dead fish floated on the river and highlights the substantial improvements in water quality since then, with around 60 fish species now present and acceptable oxygen levels.

The play incorporates elements of satire and crime drama, reflecting on past responses to pollution and the pervasive scrutiny of river health prompted by investigations from 'Correctiv'. As the narrative unfolds, it raises critical questions about the ongoing efforts to monitor and improve Rhine's water integrity. While there is encouragement about the river's well-being, the article implies that concerns about pollution remain a pressing issue, prompting a community dialogue around environmental responsibility and accountability.

By engaging audiences with a blend of entertainment and serious inquiry, the production aims to both inform and entertain, showcasing how art can reflect and address real social issues. The mention of local musicians and the regional cultural significance of the play underscores the intersection of environmental themes and community identity.