50 years of environmental monitoring at Henkel. This is a scientific paper from three Henkel experts: Thorsten Wind, Josef Steber and Johannes Tolls. The article is written in English, with an introduction in German. It contains graphs about the detergent consumption in Germany, about sewage treatment and about phosphate loads in the Rhine.
Here an insight in the content: "The gradually increasing detergents consumption in Germany since 1950 resulted in higher emissions of their ingredients to the environment. The first generation of mineral oil-based surfactants, (......), exhibited poor biodegradability and caused public environmental concerns. This prompted Henkel in 1958 to start a systematic measurement of some main detergent constituents in the River rhine in Germany."