Table of Contents

Exhibit31.1

CERTIFICATION PURSUANT TO SECTION 302 OFTHESARBANES-OXLEY ACT OF 2002

I, William H. Joyce,certify that:

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| 1.  | I have reviewed thisquarterly report on Form 10-Q of Nalco Finance Holdings LLC; |

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| 2.  | Based on my knowledge, this report doesnot contain any untrue statement of material fact or omit to state amaterial fact necessary to make the statements made, in light of thecircumstance under which such statements were made, not misleading withrespect to the period covered by this report; |

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| 3.  | Based on my knowledge, the financialstatements, and other financial information included in this report,fairly represent in all material respects the financial condition,results of operations and cash flows of the registrant, as of, and for,the periods presented in this report; |

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| 4.  | The registrant’s othercertifying officer and I are responsible for establishing andmaintaining disclosure controls and procedures (as defined in ExchangeAct Rules 13a-15(e) and 15d-15(e)) and internal control over financialreporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f))for the registrant and have: |

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| (a)  | Designed such disclosure controlsand procedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material informationrelating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly duringthe period in which this report is being prepared; |

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| (b)  | Designed such internal control over financialreporting, or caused such internal control over financial reporting tobe designed under our supervision, to provide reasonable assuranceregarding the reliability of financial reporting and the preparation offinancial statements for external purposes in accordance with generallyaccepted accounting principles; |

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| (c)  | Evaluatedthe effectiveness of the registrant’s disclosure controls andprocedures and presented in this report our conclusions about theeffectiveness of the disclosure controls and procedures, as of the endof the period covered by this report based on such evaluation; and |

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| (d)  | Disclosed in this report any change in theregistrant’s internal control over financial reporting thatoccurred during the registrant’s most recent fiscal quarter thathas materially affected, or is reasonably likely to materially affect,the registrant’s internal control over financial reporting;and |

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| 5.  | The registrant’s othercertifying officer and I have disclosed, based on our most recentevaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of theregistrant’s board of directors (or persons performing theequivalent functions): |

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| (a)  | All significantdeficiencies and material weaknesses in the design or operation ofinternal control over financial reporting which are reasonably likelyto adversely affect the registrant’s ability to record, process,summarize and report financial information; and |

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| (b)  | Any fraud, whether or not material, thatinvolves management or other employees who have a significant role inthe registrant’s internal control over financial reporting. |

Date: May  10,  2006

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| /s/ WILLIAM H. JOYCE                                                                                                      |
| Name:    William H. JoyceTitle:      Chairmanand Chief ExecutiveOfficer |
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