Louis Coin

Distinguished Departed Pioneer

Professional background

Louis Coin’s (1907-1998) remarkable education included “triple-training” as a chemical engineer, and doctorates in both hydro-geology and medicine.  He first worked at the Water Control Service of the Prefecture of the Seine where he acquired his formidable knowledge of the water resources and challenges of the Paris Region and many other French regions. 

Dr Coin’s exceptional knowledge and education was well suited to his major professional undertaking as the Chief Director of the Laboratory d’Hygiene de la Ville de Paris (LHVP) 1956-1974.  This city-supported agency still remains unique both for its breadth of responsibilities and the sophistication of its work covering water, air and indoor spaces. 

As Chief Director of LHVP over two decades, he skilfully blended scientific and administrative engagement.  For example, in pursuit of a major challenge related to chemical and microbiological problems in water, he undertook pioneering action with the Institute Pasteur and the drinking water treatment industry to define the conditions for the application of ozone as a disinfectant. 

After leaving LHVP, Dr Coin significantly contributed to major water issues again, including the Commission on Pollution of the Rhine, and the landmark EU 1980 directive for drinking water. 

Major contributions to IWA

Dr Coin was one of original founders of IAWPR in 1965 — a natural given his expertise in all aspects of water and health. He was also a key contributor to WHO’s 1966 global study on water and water pollution. 

He played a significant role in the IAWPR scientific and technical programs, from its inception through the program design for the 1982 IAWPRC Cape Town WWC.
He is remembered as an endearing character of great culture, conviction and technical authority with an enormous intellectual capacity, yet with an undeniable human warmth towards his colleagues. 

Authors: Paul D Reiter

Major Sources: Bernard Festy