Profile: Nalco Chemical Co provides water treatment and process improvement services, chemicals and equipment programs for a variety of industrial and institutional customers. Our products and services are used in water treatment applications to prevent corrosion, contamination and the buildup of harmful deposits. We develop membrane solutions for water treatment system, whether it is a reverse osmosis(ro), nanofiltration(nf) or ultra-filtration(uf) system, or a membrane bio-reactor.