<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Chairman of the Board, Chief Executive Officer and President of the Company, 
to sign such Form 10-K and any and all amendments thereto, and to file such 
Form 10-K and each such amendment so signed, with all exhibits thereto, and 
any and all other documents in connection therewith, hereby granting unto 
said attorney-in-fact and agent full power and authority to do and perform 
any and all acts and things requisite and necessary to be done in and about 
the premises, as fully to all intents and purposes as he might do in person, 
hereby ratifying and confirming all that said attorney-in-fact and agent may 
lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 8th day 
of April, 1999.

                                    /s/  J. Patrick Nicholson
                                    -------------------------
                                    J. Patrick Nicholson






                                       30
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 26th day 
of March, 1999.

                                    /s/  Frederick H. Kurtz
                                    -----------------------
                                    Frederick H. Kurtz






                                       31
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 29th day 
of March, 1999.

                                    /s/  Wallace G. Imrscher
                                    ------------------------
                                    Wallace G. Imrscher











                                       32
<PAGE>


                                   EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.                   

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 1st day 
of April, 1999.

                                    /s/  B.K. Wesley Copeland
                                    -------------------------
                                    B.K. Wesley Copeland












                                       33
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 13th day of
April, 1999.

                                    /s/  James D. O'Neil
                                    --------------------
                                    James D. O'Neil










                                       34
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 3rd day 
of April, 1999.

                                    /s/  Charles B. Kaiser, Jr.
                                    ---------------------------
                                    Charles B. Kaiser, Jr.





                                       35
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 26th day 
of March, 1999.

                                    /s/  Terry J. Logan, Ph.D.
                                    --------------------------
                                    Terry J. Logan, Ph.D.








                                       36
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 12th day of
April, 1999.

                                    /s/  Michael G. Nicholson
                                    -------------------------
                                    Michael G. Nicholson






                                       37
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 29th day 
of March, 1999.

                                    /s/  Bobby B. Carroll
                                    ---------------------
                                    Bobby B. Carroll





                                       38
<PAGE>


                                  EXHIBIT 24.1

                                POWER OF ATTORNEY


     KNOW ALL MEN BY THESE PRESENTS that the undersigned, a Director of 
N-Viro International Corporation (the "Company"), a Delaware corporation that 
is filing an Annual Report on Form 10-K ("Form 10-K") for the year ended 
December 31, 1998 with the Securities and Exchange Commission under the 
provisions of the Securities and Exchange Act of 1934, as amended, hereby 
constitutes and appoints James K. McHugh his true and lawful attorney-in-fact 
and agent, for him and in his name, place and stead, in the capacity as 
Director, to sign such Form 10-K and any and all amendments thereto, and to 
file such Form 10-K and each such amendment so signed, with all exhibits 
thereto, and any and all other documents in connection therewith, hereby 
granting unto said attorney-in-fact and agent full power and authority to do 
and perform any and all acts and things requisite and necessary to be done in 
and about the premises, as fully to all intents and purposes as he might do 
in person, hereby ratifying and confirming all that said attorney-in-fact and 
agent may lawfully do or cause to be done by virtue hereof.

     IN WITNESS WHEREOF, the undersigned hereunto sets his hand this 5th day 
of April, 1999.

                                    /s/  Daniel J. Haslinger
                                    ------------------------
                                    Daniel J. Haslinger






                                       39