Exhibit 99.1

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

    ATLANTA, July 27 /PRNewswire-FirstCall/ -- Perma-Fix Environmental
Services, Inc. (Nasdaq: PESI; Boston) (Germany: PES.BE) today announced that
it will release second quarter earnings on the morning of Monday, August 2,
2004.  In conjunction with the Company's second 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 Monday, August 2, 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 Second Quarter 2004 Operating Results

    When:  Monday, August 2, 2004, at 11:00 a.m. EDT

    Where:  http://www.firstcallevents.com/service/ajwz409166666gf12.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 1-877-461-2816
                       International Calls 416-695-9757

    Perma-Fix Environmental Services, Inc. is a national environmental
services company providing unique mixed waste and industrial waste management
services. The Nuclear Segment provides radioactive and mixed waste treatment
services to hospitals, research laboratories and institutions and numerous
federal agencies including the Departments of Energy and Defense and nuclear
utilities. 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 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-                             07/27/2004
    /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, for Perma-Fix Environmental Services, Inc.; or European
investors, Herbert Strauss, +011-43-316-296-316, or
herbert@eu-ir.com, for Perma-Fix Environmental Services, Inc./
    /Web site:  http://www.perma-fix.com/
    /Audio:  http://www.firstcallevents.com/service/ajwz409166666gf12.html/
    (PESI)

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