UNITED STATES
                        SECURITIES EXCHANGE COMMISSION
                            Washington, D.C. 20549

------------------------------------------------------------------------------


                                 SCHEDULE 13G

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)

                             NALCO HOLDING COMPANY
                             ---------------------
                               (Name of Issuer)

                   Common Stock, par value $0.01 per share
                   ---------------------------------------
                        (Title of Class of Securities)

                                  62985Q101
                                  ---------
                                (CUSIP Number)

                              December 31, 2006
                              -----------------
            (Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                               [ ] Rule 13d-1(b)

                               [X] Rule 13d-1(c)

                               [ ] Rule 13d-1(d)

* The  remainder  of this  cover  page  shall be  filled  out for a  reporting
person's  initial  filing on this form with  respect to the  subject  class of
securities,  and for any subsequent  amendment  containing  information  which
would alter the disclosures provided in a prior cover page.

The  information  required  in the  remainder  of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities  Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however,  see
the Notes).

                         Continued on following pages
                              Page 1 of 11 Pages
                            Exhibit Index: Page 10



                                 SCHEDULE 13G

CUSIP No.:   62985Q101                                      Page 2 of 11 Pages
...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).


      GLENVIEW CAPITAL MANAGEMENT, LLC
...............................................................................
2.    Check the Appropriate Box if a Member of a Group

      (a)  [ ]

      (b)  [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Citizenship or Place of Organization

      Delaware
...............................................................................
Number of       5.    Sole Voting Power           None
Shares        ................................................................
Beneficially    6.    Shared Voting Power         13,795,367
Owned by Each ................................................................
Reporting       7.    Sole Dispositive Power      None
Person With   ................................................................
                8.    Shared Dispositive Power    13,795,367
...............................................................................
9.    Aggregate Amount Beneficially Owned by Each Reporting Person

      13,795,367
...............................................................................
10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
      (See Instructions)

      [  ]
...............................................................................
11.   Percent of Class Represented by Amount in Row (9)

      9.6%  based on 143,040,860 shares outstanding as of October 31, 2006.
...............................................................................
12.   Type of Reporting Person:

      OO




                                 SCHEDULE 13G

CUSIP No.:   62985Q101                                      Page 3 of 11 Pages
...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).


      GLENVIEW CAPITAL GP, LLC
...............................................................................
2.    Check the Appropriate Box if a Member of a Group

      (a)  [ ]

      (b)  [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Citizenship or Place of Organization

      Delaware
...............................................................................
Number of       5.    Sole Voting Power           None
Shares        ................................................................
Beneficially    6.    Shared Voting Power         13,795,367
Owned by Each ................................................................
Reporting       7.    Sole Dispositive Power      None
Person With   ................................................................
                8.    Shared Dispositive Power    13,795,367
...............................................................................
9.    Aggregate Amount Beneficially Owned by Each Reporting Person

      13,795,367
...............................................................................
10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
      (See Instructions)

      [  ]
...............................................................................
11.   Percent of Class Represented by Amount in Row (9)

      9.6%  based on 143,040,860 shares outstanding as of October 31, 2006.
...............................................................................
12.   Type of Reporting Person:

      OO



                                 SCHEDULE 13G

CUSIP No.:   62985Q101                                      Page 4 of 11 Pages
...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).


      GLENVIEW CAPITAL MASTER FUND, LTD.
...............................................................................
2.    Check the Appropriate Box if a Member of a Group

      (a)  [ ]

      (b)  [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Citizenship or Place of Organization

      Cayman Islands, British West Indies
...............................................................................
Number of       5.    Sole Voting Power           None
Shares        ................................................................
Beneficially    6.    Shared Voting Power         7,868,567
Owned by Each ................................................................
Reporting       7.    Sole Dispositive Power      None
Person With   ................................................................
                8.    Shared Dispositive Power    7,868,567
...............................................................................
9.    Aggregate Amount Beneficially Owned by Each Reporting Person

      7,868,567
...............................................................................
10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
      (See Instructions)

      |X|
...............................................................................
11.   Percent of Class Represented by Amount in Row (9)

      5.5%  based on 143,040,860 shares outstanding as of October 31, 2006.
...............................................................................
12.   Type of Reporting Person:

      IA



                                 SCHEDULE 13G

CUSIP No.:   62985Q101                                      Page 5 of 11 Pages
...............................................................................
1.    Names of Reporting Persons.

      I.R.S. Identification Nos. of above persons (entities only).


      LAWRENCE M. ROBBINS
...............................................................................
2.    Check the Appropriate Box if a Member of a Group

      (a)  [ ]

      (b)  [ ]
...............................................................................
3.    SEC Use Only
...............................................................................
4.    Citizenship or Place of Organization

      United States of America
...............................................................................
Number of       5.    Sole Voting Power           None
Shares        ................................................................
Beneficially    6.    Shared Voting Power         13,795,367
Owned by Each ................................................................
Reporting       7.    Sole Dispositive Power      None
Person With   ................................................................
                8.    Shared Dispositive Power    13,795,367
...............................................................................
9.    Aggregate Amount Beneficially Owned by Each Reporting Person

      13,795,367
...............................................................................
10.   Check if the Aggregate Amount in Row (9) Excludes Certain Shares
      (See Instructions)

      [  ]
...............................................................................
11.   Percent of Class Represented by Amount in Row (9)

      9.6%  based on 143,040,860 shares outstanding as of October 31, 2006.
...............................................................................
12.   Type of Reporting Person:

      IA



                                                            Page 6 of 11 Pages

Item 1(a).  Name of Issuer:

            NALCO Holding Company (the "Issuer")

Item 1(b).  Address of Issuer's Principal Executive Offices:

            1601 West Diehl Road, Naperville, Illinois 60563-1198.

Item 2(a).  Name of Person Filing:

            This Statement is filed on behalf of each of the following persons
(collectively, the "Reporting Persons"):

            i)    Glenview Capital Management, LLC ("Glenview Capital
                  Management");

            ii)   Glenview Capital GP, LLC ("Glenview Capital GP");

            iii)  Glenview Capital Master Fund, Ltd. ("Glenview Capital Master
                  Fund"); and

            iv)   Lawrence M. Robbins ("Mr. Robbins").

            This Statement  relates to Shares (as defined herein) held for the
accounts of Glenview Capital  Partners,  L.P., a Delaware limited  partnership
("Glenview  Capital  Partners"),  Glenview  Institutional  Partners,  L.P.,  a
Delaware limited partnership  ("Glenview  Institutional  Partners"),  Glenview
Capital  Master  Fund, a Cayman  Islands  exempted  company,  GCM Little Arbor
Master Fund, Ltd., a Cayman Islands exempted company ("GCM Little Arbor Master
Fund"),  GCM Little Arbor  Institutional  Partners,  L.P., a Delaware  limited
partnership ("GCM Little Arbor Institutional Partners"),  and GCM Little Arbor
Partners, L.P., a Delaware limited partnership ("GCM Little Arbor Partners").

            Glenview Capital  Management serves as investment  manager to each
of  Glenview  Capital  Partners,  Glenview  Institutional  Partners,  Glenview
Capital   Master  Fund,  GCM  Little  Arbor  Master  Fund,  GCM  Little  Arbor
Institutional  Partners,  and GCM Little  Arbor  Partners.  In such  capacity,
Glenview Capital Management may be deemed to have voting and dispositive power
over the Shares held for the  accounts of each of Glenview  Capital  Partners,
Glenview  Institutional  Partners,  Glenview  Capital  Master Fund, GCM Little
Arbor Master Fund,  GCM Little Arbor  Institutional  Partners,  and GCM Little
Arbor Partners. Glenview Capital GP is the general partner of Glenview Capital
Partners,  Glenview  Institutional  Partners,  GCM Little Arbor  Institutional
Partners and GCM Little Arbor Partners. Glenview Capital GP also serves as the
sponsor of the  Glenview  Capital  Master Fund and the GCM Little Arbor Master
Fund. In such capacities, Glenview Capital GP may be deemed to have voting and
dispositive  power over the Shares  held for the  accounts of each of Glenview
Capital Partners,  Glenview  Institutional  Partners,  Glenview Capital Master
Fund, GCM Little Arbor Master Fund, GCM Little Arbor  Institutional  Partners,
and GCM Little Arbor Partners.  Mr. Robbins is the Chief Executive  Officer of
Glenview Capital Management and Glenview Capital GP.

Item 2(b). Address of Principal Business Office or, if None, Residence

            The address of the principal  business  office of each of Glenview
Capital Management,  Glenview Capital GP, and Mr. Robbins is 767 Fifth Avenue,
44th Floor,  New York, New York 10153.  The address of the principal  business
office of Glenview Capital Master Fund is Harbour Centre, North Church Street,
P.O. Box 8966T,  George  Town,  Grand  Cayman,  Cayman  Islands,  British West
Indies.



                                                            Page 7 of 11 Pages

Item 2(c).  Citizenship

            i)    Glenview Capital Management is a Delaware limited liability
                  company;

            ii)   Glenview Capital GP is a Delaware limited liability company;

            iii)  Glenview Capital Master Fund is a Cayman Islands exempted
                  company; and

            iv)   Mr. Robbins is a citizen of the United States of America.

Item 2(d).  Title of Class of Securities:

            Common Stock, par value $0.01 per share (the "Shares")

Item 2(e).  CUSIP Number:

            62985Q101

Item 3.     If This  Statement  is Filed  Pursuant  to  ss.ss.240.13d-1(b)  or
            240.13d-2(b) or (c), Check Whether the Person Filing is a:

            This Item 3 is not applicable.

Item 4.     Ownership:

Item 4(a)   Amount Beneficially Owned:

            (i) As of December 29, 2006, each of Glenview Capital  Management,
Glenview  Capital GP and Mr. Robbins may be deemed to be the beneficial  owner
of 13,795,367 Shares. This amount consists of: (A) 624,300 Shares held for the
account of  Glenview  Capital  Partners;  (B)  7,868,567  Shares  held for the
account of Glenview  Capital  Master Fund;  (C) 3,549,500  Shares held for the
account of Glenview Institutional  Partners; (D) 1,358,800 Shares held for the
account of GCM Little  Arbor  Master  Fund,  (E)  372,400  Shares held for the
account of GCM Little Arbor Institutional Partners, and (F) 21,800 Shares held
for the account of GCM Little Arbor Partners.

            (ii) As of December 29, 2006,  Glenview Capital Master Fund may be
deemed to be the beneficial owner of 7,868,567 Shares. This amount consists of
7,868,567 Shares held for its account.

Item 4(b)   Percent of Class:

            (i) The  number  of  Shares  of  which  each of  Glenview  Capital
Management,  Glenview  Capital  GP and Mr.  Robbins  may be  deemed  to be the
beneficial owner constitutes  approximately 9.6% of the total number of Shares
outstanding  (based  upon  information  provided  by the  Issuer  in its  most
recently-filed repot on Form 10-Q, there were approximately 143,040,860 shares
outstanding as of October 31, 2006).

(ii) The number of Shares of which Glenview  Capital Master Fund may be deemed
to be the beneficial owner constitutes  approximately 7.1% of the total number
of Shares  outstanding  (based upon information  provided by the Issuer in its
most recently-filed  repot on Form 10-Q, there were approximately  143,040,860
shares outstanding as of October 31, 2006).



                                                            Page 8 of 11 Pages

Item 4(c)   Number of Shares of which such person has:

Glenview Capital Management, Glenview Capital GP, and Mr. Robbins:

(i)   Sole power to vote or direct the vote:                                  0

(ii)  Shared power to vote or direct the vote:                       13,795,367

(iii) Sole power to dispose or direct the disposition of:                     0

(iv)  Shared power to dispose or direct the disposition of:          13,795,367

Glenview Capital Master Fund:

(i)   Sole power to vote or direct the vote:                                  0

(ii)  Shared power to vote or direct the vote:                        7,868,567

(iii) Sole power to dispose or direct the disposition of:                     0

(iv)  Shared power to dispose or direct the disposition of:           7,868,367


Item 5.     Ownership of Five Percent or Less of a Class:

            This Item 5 is not applicable

Item 6.     Ownership of More than Five  Percent on Behalf of Another  Person:

            This Item 6 is not applicable.

Item 7.     Identification and Classification of the Subsidiary Which Acquired
            the Security Being Reported on By the Parent Holding Company:

            See disclosure in Item 2 hereof.

Item 8.     Identification and Classification of Members of the Group:

            This Item 8 is not applicable.

Item 9.     Notice of Dissolution of Group:

            This Item 9 is not applicable.

Item 10.    Certification:

            By signing below each of the Reporting  Persons certifies that, to
the best of their knowledge and belief, the securities  referred to above were
not  acquired  and are not  held for the  purpose  of or with  the  effect  of
changing or  influencing  the control of the issuer of the securities and were
not acquired and are not held in connection  with or as a  participant  in any
transaction having that purpose or effect.



                                                            Page 9 of 11 Pages

                                   SIGNATURE

            After  reasonable  inquiry  and to the  best of my  knowledge  and
belief,  I certify that the  information  set forth in this statement is true,
complete and correct.

Date: February 14, 2007                  GLENVIEW CAPITAL MANAGEMENT, LLC


                                         By: /s/ Lawrence M. Robbins
                                             ---------------------------------
                                         Name:  Lawrence M. Robbins
                                         Title: Chief Executive Officer

Date: February 14, 2007                  GLENVIEW CAPITAL GP, LLC


                                         By: /s/ Lawrence M. Robbins
                                             ---------------------------------
                                         Name:  Lawrence M. Robbins
                                         Title: Chief Executive Officer

Date: February 14, 2007                  GLENVIEW CAPITAL MASTER FUND, LTD.

                                         By:  Glenview Capital Management, LLC
                                              As Investment Manager

                                         By: /s/ Lawrence M. Robbins
                                             ---------------------------------
                                         Name:  Lawrence M. Robbins
                                         Title: Chief Executive Officer

Date: February 14, 2007                  LAWRENCE M. ROBBINS


                                         /s/ Lawrence M. Robbins
                                         ----------------------------



                                                           Page 10 of 11 Pages

                                 EXHIBIT INDEX

Ex.                                                                   Page No.

A     Joint Filing Agreement, dated February 14, 2007 by and
      among  Glenview  Capital  Management,   LLC,  Glenview             11
      Capital  GP, LLC, Glenview  Capital  Master  Fund,
      Ltd., and Lawrence M. Robbins.......



                                                            Page 11 of 11 Pages

                                   EXHIBIT A

                            JOINT FILING AGREEMENT

            The  undersigned  hereby agree that the  statement on Schedule 13G
with respect to the Common Stock of NALCO Holding Company dated as of February
14, 2007 is, and any amendments thereto (including amendments on Schedule 13D)
signed  by each of the  undersigned  shall  be,  filed on behalf of each of us
pursuant to and in accordance  with the  provisions of Rule 13d-1(k) under the
Securities Exchange Act of 1934, as amended.


Date: February 14, 2007                  GLENVIEW CAPITAL MANAGEMENT, LLC


                                         By: /s/ Lawrence M. Robbins
                                             ---------------------------------
                                         Name:  Lawrence M. Robbins
                                         Title: Chief Executive Officer

Date: February 14, 2007                  GLENVIEW CAPITAL GP, LLC


                                         By: /s/ Lawrence M. Robbins
                                             ---------------------------------
                                         Name:  Lawrence M. Robbins
                                         Title: Chief Executive Officer

Date: February 14, 2007                  GLENVIEW CAPITAL MASTER FUND, LTD.

                                         By:  Glenview Capital Management, LLC
                                              As Investment Manager

                                         By: /s/ Lawrence M. Robbins
                                             ---------------------------------
                                         Name:  Lawrence M. Robbins
                                         Title: Chief Executive Officer

Date: February 14, 2007                  LAWRENCE M. ROBBINS


                                         /s/ Lawrence M. Robbins
                                         ----------------------------