Exhibit 12.1

I, Antoine Frérot, certify that:

1.

I
  have reviewed this annual report on Form 20-F of Veolia Environnement;

2.

Based
  on my knowledge, this report does not contain any untrue statement of a material
  fact or omit to state a material fact necessary to make the statements made,
  in light of the circumstances under which such statements were made, not misleading
  with respect to the period covered by this report;

3.

Based
  on my knowledge, the financial statements, and other financial information included
  in this report, fairly present in all material respects the financial condition,
  results of operations and cash flows of the company as of, and for, the periods
  presented in this report;

4.

The
  companys other certifying officer and I are responsible for establishing
  and maintaining disclosure controls and procedures (as defined in Exchange Act
  Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting
  (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the company and
  have:

(a)

Designed
  such disclosure controls and procedures, or caused such disclosure controls
  and procedures to be designed under our supervision, to ensure that material
  information relating to the company, including its consolidated subsidiaries,
  is made known to us by others within those entities, particularly during the
  period in which this report is being prepared;

(b)

Designed
  such internal control over financial reporting, or caused such internal control
  over financial reporting to be designed under our supervision, to provide reasonable
  assurance regarding the reliability of financial reporting and the preparation
  of financial statements for external purposes in accordance with generally accepted
  accounting principles;

(c)

Evaluated
  the effectiveness of the companys disclosure controls and procedures and
  presented in this report our conclusions about the effectiveness of the disclosure
  controls and procedures, as of the end of the period covered by this report
  based on such evaluation; and

(d)

Disclosed
  in this report any change in the companys internal control over financial
  reporting that occurred during the period covered by the annual report that
  has materially affected, or is reasonably likely to materially affect, the companys
  internal control over financial reporting; and

5.

The
  companys other certifying officer and I have disclosed, based on our most
  recent evaluation of internal control over financial reporting, to the companys
  auditors and the audit committee of the companys board of directors (or
  persons performing the equivalent functions):

(a)

All
  significant deficiencies and material weaknesses in the design or operation
  of internal control over financial reporting which are reasonably likely to
  adversely affect the companys ability to record, process, summarize and
  report financial information; and

(b)

Any
  fraud, whether or not material, that involves management or other employees
  who have a significant role in the companys internal control over financial
  reporting.





|Date:
        April 12, 2013 |        |                                             
|---------------------------- | ------ | --------------------------------------------
|                             | By:    | /s/
        Antoine Frérot                  
|                             |        |                                             
|                             | Name:  | Antoine
        Frérot                      
|                             | Title: | Chairman
        and Chief Executive Officer