Nalco Holding Company (Nalco) is the provider of integrated water treatment applications to prevent corrosion, contamination and the buildup of harmful deposits. The Company has a sales and service team of 7,000 technically trained professionals serving more than 70,000 customers in a range of end markets, including aerospace, chemical, pharmaceutical, petroleum, steel, power, food and beverage, medium and light manufacturing, marine and pulp and papermaking industries as well as institutions such as hospitals, universities and hotels. Nalco operates in three business segments: industrial and institutional services, energy services and paper services.