Europe is a vital region for Nalco, an Ecolab company. The companys European headquarters is in Rolle, Switzerland. Nalco also has a research and development center in Leiden, the Netherlands. Nalco played a vital role in post-World War II Europe by helping the European railroad system get back on its feet with improved water treatment technology for steam engines. In 1952, the company established its first physical presence in Europe in opening its plant in Cisterna, Italy. Today, Nalcos more than 3,000 European employees work as a team to provide our customers with products and services that improve their operations.