UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                    FORM 10-Q/A
                                (Amendment No. 2)

(Mark One)

[ X ]    QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended March 31, 1997

                                       OR

[    ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                         Commission file number 0-16225

                                      EMCON

             (Exact name of Registrant as specified in its charter)


             California                                       94-1738964
 ----------------------------------                      ----------------------
(State or other jurisdiction of                          (I.R.S.Employer
incorporation or organization)                           Identification No.)

400 South El Camino Real, Suite 1200
San Mateo, California                                           94402
---------------------------------------                     -------------
(Address of  principal executive offices)                    (Zip Code)


       Registrant's telephone number, including area code: (415) 375-1522

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. Yes [ X ] No [ ]

8,535,372 shares of Common Stock Issued and Outstanding as of May 13, 1997.


                                       1
<PAGE>


                    INFORMATION TO BE INCLUDED IN THE REPORT
                                Amendment No. 2

     The  undersigned  registrant  hereby amends the following items of its Form
10-Q for the period  ended March 31, 1997:  Amendment  No. 1 on Form 10Q/A filed
with the  Securities  and  Exchange  Commission  on May 22,  1997  inadvertently
omitted the necessary  signature  page.  Exhibit 11.1 is amended and restated as
follows:

                                  EXHIBIT 11.1

                                      EMCON
                         COMPUTATION OF INCOME PER SHARE
                      (In thousands except per share data)

<TABLE>
<CAPTION>

                                                                                                             Three months ended
                                                                                                                  March 31,

                                                                                                          1997                 1996
                                                                                                          ----                 ----
<S>                                                                                                        <C>                  <C>

Net income ...............................................................................               $  691               $   34
 Proforma interest income related to modified
  treasury stock method ..................................................................                  N/A                   48
                                                                                                         ------               ------

Adjusted net income ......................................................................               $  691               $   82
                                                                                                         ======               ======

Weighted average number of common shares
 outstanding during the period ...........................................................                8,535                8,457

Common and common equivalent shares outstanding
 for the purpose of calculating primary net income per share .............................                8,472                  N/A
Common equivalent shares from outstanding
 stock options using the modified treasury
 stock method ............................................................................                  N/A                  959
Incremental shares to reflect full dilution (1) ..........................................                    0                    0
                                                                                                         ------               ------

Total shares for purposes of calculating diluted
 income per share (1) ....................................................................                8,472                9,416
                                                                                                         ======               ======

Primary income per share .................................................................               $ 0.08               $ 0.01
                                                                                                         ======               ======

Fully diluted income per share ...........................................................               $ 0.08               $ 0.01
                                                                                                         ======               ======
</TABLE>

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

(1)    This  calculation  is submitted in accordance  with  Regulation  S-K Item
       601(b)(11)  although  not  required by footnote 2 to  paragraph 14 to APB
       opinion No. 15, because it results in dilution of less than 3%.




                                      2
<PAGE>

SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  amendment  to be signed on its behalf by the
undersigned hereunto duly authorized.

                              EMCON



Date:   May 27, 1997          By:  /s/ R. Michael Momboisse
        -------------         -------------------------------
                              R. Michael Momboisse
                              Chief Financial Officer and
                              Vice President - Legal