Exhibit 21.1
Active Subsidiaries of Nalco Holding Company
| Derypol SA |
Spain | |
| Katayama Nalco Inc. |
Japan | |
| Malaysian Energy Chem & Services Sdn Bhd |
Malaysia | |
| Nalco Africa (Pty.) Ltd. |
South Africa | |
| Nalco Anadolu Kimya Sanayii Ve Ticaret AS |
Turkey | |
| Nalco Argentina S.R.L. |
Argentina | |
| Nalco Australia Pty. Ltd. |
Australia | |
| Nalco Belgium NV/SA |
Belgium | |
| Nalco Brasil Ltda |
Brazil | |
| Nalco Canada Co. |
Canada | |
| Nalco Company |
Delaware | |
| Nalco Company OOO |
Russia | |
| Nalco Crossbow Water, LLC |
Delaware | |
| Nalco de Colombia Ltda |
Colombia | |
| Nalco de Mexico, S. de R.L. de C.V. |
Mexico | |
| Nalco Deutschland GmbH |
Germany | |
| Nalco Egypt, Ltd. |
Egypt | |
| Nalco Egypt Trading |
Egypt | |
| Nalco Energy Services Equatorial Guinea LLC |
Delaware | |
| Nalco Espanola, S.A. |
Spain | |
| Nalco Europe B.V. |
Netherlands | |
| Nalco Fab-Tech, LLC |
Delaware | |
| Nalco Finance Holdings LLC |
Delaware | |
| Nalco Finland OY |
Finland | |
| Nalco France |
France | |
| Nalco Gulf Limited |
Jersey | |
| Nalco Hellas S.A. |
Greece | |
| Nalco Hong Kong Limited |
Hong Kong | |
| Nalco Hungary KFT |
Hungary | |
| Nalco Industrial Outsourcing Company |
Delaware | |
| Nalco Industrial Services Chile Limitada |
Chile | |
| Nalco Industrial Services Malaysia SDN BHD |
Malaysia | |
| Nalco Industrial Services (Nanjing) Co. |
People’s Republic of China | |
| Nalco Industrial Services (Su Zhou) Co. |
People’s Republic of China | |
| Nalco Industrial Services (Thailand) Co. Limited |
Thailand | |
| Nalco Italiana SrL |
Italy | |
| Nalco Korea, Ltd. |
Korea | |
| Nalco Limited |
United Kingdom | |
| Nalco Mobotec, Inc. |
Delaware | |
| Nalco Netherlands B.V. |
Netherlands | |
| Nalco New Zealand Limited |
New Zealand | |
| Nalco Norge A/S |
Norway | |
| Nalco Oesterreich Ges m.b.H |
Austria | |
| Nalco Pacific Private, Ltd. |
Singapore | |
| Nalco Receivables LLC |
Delaware | |
| Nalco Saudi Co. Ltd |
Saudi Arabia | |
| Nalco (Shanghai) Trading Co. Ltd. |
People’s Republic of China | |
| Nalco Taiwan Co., Ltd. |
Taiwan | |
| Nalco Venezuela SCA |
Venezuela | |
| NLC Nalco India Limited |
India | |
| PT Nalco Indonesia |
Indonesia |
The names of the Company’s other subsidiaries are omitted because, considered in the aggregate as a single subsidiary, such subsidiaries would not constitute a significant subsidiary as of December 31, 2010.