Exhibit 3.1(a)
                THE COMMONWEALTH OF MASSACHUSETTS

                  Secretary of the Commonwealth
                   STATE HOUSE, BOSTON, MASS.
                              02133
                   ARTICLES OF AMENDMENT
           General Laws, Chapter 156B, Section 72      04-2068530

    This certificate must be submitted to the Secretary of the
Commonwealth within sixty days after the date of the vote of stockholders
adopting the amendment.  The fee for filing this certificate is
prescribed by General Laws, Chapter 156B, Section 114.  Make check
payable to the Commonwealth of Massachusetts.

We,        Arthur L. Goldstein                    President
           Robert B. Luick                        Assistant Clerk of

           Ionics, Incorporated
_____________________________________________________________
                       (Name of Corporation)

located at: 65 Grove Street, Watertown,  02172
_____________________________________________________________

do hereby certify that the following amendment to the articles of
organization of the corporation was duly adopted at a meeting held
on May 6, 1987, by vote of:

2,530,225 shares of Common  out of 3,696,826 shares outstanding,
                   (Class of Stock)
          shares of              out of           shares outstanding, and
                   (Class of Stock)
          shares of              out of           shares outstanding,
                   (Class of Stock)

CROSS OUT  being at least xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
INAPPLI-   two-thirds of each class outstanding and entitled to vote
CABLE      thereon xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
CLAUSE     xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
           xxxxxxxx

    That paragraph 6 of the Restated Articles of Organization be amended
by adding the following additional sub-paragraph thereto:

          "A Director of this Corporation shall have no personal liability
    to this Corporation or to its stockholders for monetary damages for
    breach of fiduciary duty as a Director, notwithstanding any provision
    of law imposing such liability; provided, however, that such provision
    shall not eliminate or
          (1) For amendments adopted pursuant to Chapter 156B, Section 70.
          (2) For amendments adopted pursuant to Chapter 156B, Section 71.

Note:     Amendments for which the space provided above is not sufficient
should be set out on continuation sheets to be numbered 2A, 2B etc.
Continuation sheets shall be on 8 1/2" wide x 11" high paper and must have
a left-hand margin 1 inch wide for binding.  Only one side should be used.

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limit the liability of a Director (i) for any breach of the Director's
duty of loyalty to the Corporation or its stockholders; (ii) for acts or
omissions not in good faith or which involve intentional misconduct or
knowing violations of law; (iii) under sections sixty-one or sixty-two of
Chapter 156B of the General Laws of Massachusetts, or (iv) for any
transaction from which the Director derived an improper personal benefit.
Neither the amendment or repeal of this paragraph, nor the adoption of any
provision of these Restated Articles of Organization inconsistent with
this paragraph, shall eliminate or reduce the effect of this paragraph in
respect of any matter occurring, or any cause of action, suit or claim
that, but for this paragraph, would accrue or arise, prior to such
amendment, repeal, or adoption of an inconsistent provision."











  The foregoing amendment will become effective when these articles of
amendment are filed in accordance with Chapter 156B, Section 6 of The
General Laws unless these articles specify, in accordance with the vote
adopting the amendment, a later effective date not more than thirty days
after such filing, in which event the amendment will become effective on
such later date.

IN WITNESS WHEREOF AND UNDER THE PENALTIES OF PERJURY, we have hereto
signed our names this twelfth day of June, in the year 1987.

     /s/Arthur L. Goldstein                      President
__________________________________________________________________

    /s/Robert B. Luick                           Assistant Clerk
__________________________________________________________________














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[STAMP]  SECRETARY OF
         COMMONWEALTH

         1987 JUN 13 PM 3:57
         CORPORATION DIVISION


                     THE COMMONWEALTH OF MASSACHUSETTS

                           ARTICLES OF AMENDMENT

                 (General Laws, Chapter 156B, Section 72)


              I hereby approve the within articles of amendment
             and the filing fee in the amount of $75.00 having
          been paid, said articles are deemed to have been filed
                    with me this 19th day of June 1987.


                          /s/Michael J. Connolly
                          MICHAEL JOSEPH CONNOLLY
                       Secretary of the Commonwealth
                        State House, Boston, Mass.









         TO BE FILLED IN BY CORPORATION

         PHOTOCOPY OF AMENDMENT TO BE SENT



     TO:    Robert B. Luick, Esq.
            SULLIVAN & WORCESTER
            One Post Office Square
            Boston, MA  02110
            (617)338-2800












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