                                                                    Exhibit 99.1

   Perma-Fix Environmental Services, Inc. Announces Release of First Quarter
              Earnings and Invites You to Join Its Conference Call


    ATLANTA, April 28 /PRNewswire-FirstCall/ -- Perma-Fix Environmental
Services, Inc. (Nasdaq: PESI; Boston) (Germany: PES.BE) today announced that
it will release first quarter earnings on the morning of Friday, April 30,
2004.  In conjunction with the Company's first quarter earnings release, you
are invited to listen to its conference call that will be broadcast live over
the Internet, or to participate directly in the conference call at the numbers
noted below. The conference call will be held on Friday, April 30, 2004, at
11:00 a.m. EDT with Dr. Louis F. Centofanti, Chairman and CEO, and Richard T.
Kelecy, Vice President and CFO, of Perma-Fix Environmental Services, Inc.


     What:     Perma-Fix Presents First Quarter 2004 Operating Results

     When:     Friday, April 30, 2004, at 11:00 a.m. EDT

     Where:    http://www.firstcallevents.com/service/ajwz405619242gf12.html

     How:      Live over the Internet -- Simply log on to the web at the
               address above

     Contact:  Richard T. Kelecy
               352-395-1351

            TO PARTICIPATE IN THE CONFERENCE CALL PLEASE DIAL-IN:

                          U.S. Calls 1-877-888-3490
                       International Calls 416-695-5261


     Perma-Fix Environmental Services, Inc. is a national environmental
services company, providing unique mixed waste and industrial waste management
services.  The industrial segment provides hazardous and non-hazardous waste
treatment services for a diverse group of customers including Fortune 500
companies, numerous federal, state and local agencies and thousands of smaller
clients.  The nuclear segment provides radioactive and mixed waste treatment
services to hospitals, research laboratories and institutions, numerous
federal agencies including the Departments of Energy and Defense and nuclear
utilities.  The Company operates eleven major waste treatment facilities
across the country.


    Please visit us on the World Wide Web at http://www.perma-fix.com.



SOURCE  Perma-Fix Environmental Services, Inc.
    -0-                             04/28/2004
    /CONTACT:  Dr. Louis F. Centofanti, Chairman and CEO, Perma-Fix
Environmental Services, Inc., +1-404-847-9990; or David Waldman or John
Heilshorn, both of Lippert Heilshorn & Associates, +1-212-838-3777, or
dwaldman@lhai.com; or Herbert Strauss - European investor relations,
+011-43-316-296-316, or herbert@eu-ir.com, all for Perma-Fix/
    /Web site:  http://www.perma-fix.com /
    /Audio:  http://www.firstcallevents.com/service/ajwz405619242gf12.html /
    (PESI)

CO:  Perma-Fix Enviornmental Services, Inc.
ST:  Georgia
IN:  ENV UTI
SU:  CCA MAV

