EXHIBIT 99
                       ENVIRONMENTAL TEST SYSTEMS, INC.
                             23575 COUNTY ROAD 106
                         ELKHART, INDIANA  46514-0659
                          ___________________________

                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                        TO BE HELD _____________, 1998

To The Shareholders Of Environmental Test Systems, Inc.:

     NOTICE IS HEREBY GIVEN that a Special Meeting of the Shareholders of 
Environmental Test Systems, Inc., an Indiana corporation ("ETS"), will be 
held at the principal offices of ETS located at 23575 County Road 106, 
Elkhart, Indiana, on ____________, ____, 1998, at 8:00 a.m., local time (the 
"Special Meeting"), for the following purpose:

          To consider a vote upon a proposal to approve the merger of ETS into
     Hach Acquisition Corp. ("HAC"), a wholly owned subsidiary of Hach Company
     ("Hach"), a Delaware corporation pursuant to an Agreement and Plan of
     Merger dated as of January 21, 1998, as amended March __, 1998 (the
     "Merger Agreement"), among Hach, HAC and ETS, pursuant to which (a) each
     outstanding share of ETS Class A Common Stock will be converted into
     shares of Hach Common Stock, (b) each outstanding share of ETS Class B
     Common Stock will be converted into cash and shares of Hach Common Stock
     and Hach Class A Common Stock and (c) ETS will be merged into HAC and
     become a wholly-owned subsidiary of Hach, all as more fully described in
     the accompanying Proxy Statement/Prospectus.
     
     A copy of the Merger Agreement is attached to the accompanying Proxy
Statement/Prospectus as Appendix A.

     Only shareholders of record at the close of business on _________________, 
1998 are entitled to notice of, and to vote at, the Special Meeting and at any 
and all adjournments or postponements thereof.

     Shareholders are cordially invited to attend the Special Meeting.  It is 
important that your shares of ETS Common Stocks be represented at the Special 
Meeting regardless of the number of shares you hold.  You are urged to cast 
your vote by marking, dating and signing the enclosed proxy card and 
returning it in the enclosed business reply envelope.  No postage is required 
if mailed in the United States.  If you wish to vote in accordance with the 
recommendation of the ETS Board of Directors, all you need to do is date and 
sign the proxy card and return it in the enclosed envelope.

                              By order of the Board of Directors,


                              Mark J. Stephenson
                              President


___________________, 1998

    Your vote is important.  Please complete and return your proxy promptly.
                                       
THE AFFIRMATIVE VOTE OF HOLDERS OF A MAJORITY OF THE OUTSTANDING SHARES OF 
EACH CLASS OF THE ETS COMMON STOCKS, VOTING SEPARATELY, IS REQUIRED FOR 
APPROVAL OF THE MERGER.  REGARDLESS OF WHETHER YOU PLAN TO ATTEND THE SPECIAL 
MEETING, PLEASE SIGN, DATE AND RETURN THE ENCLOSED PROXY IN THE ENVELOPE 
PROVIDED. PLEASE DO NOT SEND STOCK CERTIFICATES AT THIS TIME.



                                     PROXY
                                       
                       ENVIRONMENTAL TEST SYSTEMS, INC.
                                       
        SPECIAL MEETING OF SHAREHOLDERS -- _______________ _____, 1998
          THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS
                                       
     The undersigned hereby appoint(s) ________________ and ________________, 
and each of them, each with the power of substitution, as proxies and agent 
("Proxy Agents"), in the name of the undersigned to represent and to vote as 
designated below all of the shares of Common Stock of ENVIRONMENTAL TEST 
SYSTEMS, INC. ("ETS"), held of record by the undersigned on __________ , 
________________ ____, 1998, at a Special Meeting of Shareholders to be held 
on _______________, ________________ ____, 1998, and any adjournment(s) 
thereof, the undersigned herewith ratifying all that such Proxy Agents may do 
so.  The undersigned further acknowledges receipt of the Notice of Special 
Meeting dated _______________ ____, 1998 and the Proxy Statement/Prospectus 
dated ______________ ____, 1998 of ETS.

     THIS PROXY, WHEN PROPERLY EXECUTED AND RETURNED TO ETS, WILL BE VOTED IN 
THE MANNER DIRECTED HEREIN BY THE UNDERSIGNED SHAREHOLDER(S).  IF NO 
DIRECTION IS MADE, THIS PROXY WILL BE VOTED FOR PROPOSAL 1.

     1.   Proposal to approve the merger of ETS into Hach Acquisition Corp. 
("HAC"), a wholly owned subsidiary of Hach Company ("Hach"), a Delaware 
corporation pursuant to an Agreement and Plan of Merger dated as of January 
21, 1998, as amended March ____, 1998 (the "Merger Agreement"), among Hach, 
HAC and ETS, pursuant to which (a) each outstanding share of ETS Class A 
Common Stock will be converted into shares of Hach Common Stock, (b) each 
outstanding share of ETS Class B Common Stock will be converted into cash and 
shares of Hach Common Stock and Hach Class A Common Stock and (c) ETS will be 
merged into HAC and become a wholly-owned subsidiary of Hach, all as more 
fully described in the accompanying Proxy Statement/Prospectus.

          For            Against             Abstain

          / /              / /                 / /


                              Dated:  _______________ ____, 1998

                              Signature: _______________________________
                                        
                              Signature: _______________________________

                              PLEASE DATE AND SIGN exactly as name(s)
                              appears on the envelope addressed to you and
                              return promptly in the accompanying prepaid 
                              envelope. If shares are held by joint tenants 
                              or as community property, both shareholders 
                              should sign.