Exhibit 99.1
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     CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


I,  Terry  J.  Logan,  the  Chief  Executive  Officer  of  N-Viro  International
Corporation, certify that (i) the Form 10-K fully complies with the requirements
of  Section  13(a)  or 15(d) of the Securities Exchange Act of 1934 and (ii) the
information  contained  in  the  Form  10-K  fairly  presents,  in  all material
respects,  the  financial  condition  and  results  of  operations  of  N-Viro
International  Corporation.


/s/  Terry  J.  Logan
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Terry  J.  Logan,  Chief  Executive  Officer
May  12,  2003




     CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


I,  James  K.  McHugh,  the  Chief  Financial  Officer  of  N-Viro International
Corporation, certify that (i) the Form 10-K fully complies with the requirements
of  Section  13(a)  or 15(d) of the Securities Exchange Act of 1934 and (ii) the
information  contained  in  the  Form  10-K  fairly  presents,  in  all material
respects,  the  financial  condition  and  results  of  operations  of  N-Viro
International  Corporation.


/s/  James  K.  McHugh
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James  K.  McHugh,  Chief  Financial  Officer
May  12,  2003