Exhibit 99.1
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   N-VIRO INTERNATIONAL ANNOUNCES MEMORANDUM OF UNDERSTANDING WITH TOHO WATER
      AUTHORITY FOR DEVELOPMENT OF N-VIRO FUEL FACILITY IN CENTRAL FLORIDA

TOLEDO,  Ohio,  May  20,  2009 - N-Viro International Corp. (OTC Bulletin Board:
NVIC.OB),  announced  today  its subsidiary, Florida N-Viro, L.P., has reached a
memorandum  of  understanding (MOU) with the Toho Water Authority (TWA), located
in  Osceola  County,  Florida.  The  MOU is a platform for N-Viro to negotiate a
definitive agreement with TWA for the permitting and construction of a biosolids
processing  facility  within  central Florida. The anticipated arrangement would
provide biosolids treatment for TWA and surrounding municipalities. The proposed
facility is anticipated to utilize N-Viro's patented N-Viro FuelTM process which
converts  biosolids  into  alternative  renewable  energy  that qualifies within
Florida's  renewable  energy  portfolio.

The MOU calls for N-Viro and TWA to work jointly to identify a suitable location
as  well  as  to negotiate all business terms for a long-term agreement.  N-Viro
anticipates  that  an  agreement  can  be  reached  to  begin  permitting  and
construction  for  a  desired  2009  or  2010  completion.

It  is  expected that the proposed facility, once constructed, would receive and
process  biosolids  utilizing  N-Viro's  patented technology to achieve Class AA
standards as set forth by Florida Regulation 62-640.  Class AA standard products
also  satisfy  U.S.  EPA  503  Regulations  for  the highest level of treatment.

Mr.  Timothy  Kasmoch,  CEO  and  President  of  N-Viro  International had these
comments:  "We  are  excited  to  have an opportunity with such potential within
central  Florida.  It  has  always  been  our  intention  to  grow  our  Florida
operations  and  construct  new  facilities  designed  to  produce our renewable
biomass  fuel.  Coupled  with our existing Volusia County facility, we expect to
be  well-positioned  to  serve the Florida biosolids market.  We look forward to
working  with  TWA  on  this exciting project and the opportunity to further our
commitment  toward  the  environment.  The  construction  of this facility would
provide TWA and other area communities, a long-term sustainable beneficial reuse
of  these  waste  materials."

Mr.  Kasmoch  concluded:  "The  Company and its management believe our processes
are the best solution for our environment as all eyes are focused on sustainable
conservation  of  natural  resources."

About  N-Viro  International  (www.nviro.com)
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N-Viro  International  is  an environmental and materials operating company that
owns  patented  technologies  to  convert various types of waste into beneficial
alternative  fuel  products,  including  the renewable biofuel N-Viro FuelTM and
N-Viro  SoilTM.  Its  renewable biofuel technology, N-Viro FuelTM , has received
alternative  energy  status from the U.S. Environmental Protection Agency, which
qualifies  the  technology for renewable energy incentives. N-Viro International
operates  processing  facilities  independently  as  well as in partnership with
municipalities.


Special  Cautionary  Note  Regarding  Forward-Looking  Statements
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This  press  release  contains  forward looking statements. N-Viro cautions that
statements  containing  words  such  as  'expects,'  'estimates,' 'anticipates,'
'believes'  and  'may,'  as  well  as similar words and expressions used herein,
identify  and  refer  events  that  may  or  may not occur in the future.  These
forward-looking  statements  and  the matters to which they refer are subject to
considerable  uncertainty  that  may  cause  actual  results  to  be  materially
different  from those described herein.  For example, the entry into an MOU with
the  Toho  Water Authority is subject to the satisfaction of certain conditions,
including,  but not limited to, acceptable engineering and cost analysis for the
building  and operation of a facility and the negotiation and execution of final
binding  agreements  relating  to  the  project.  Further,  the  success  and
profitability of the project would depend on the actual revenues and expenses of
the  Company,  which  may differ from the Company's estimates.  Factors that may
cause  expenses  to  differ  from  the  Company's expectations include, fuel and
transportation  costs,  labor  costs  and  costs  relating  to the treatment and
processing  of  the  biosolids  and  creation  of  the  N-Viro fuel.  Additional
information  about  these  and  other  factors  that may cause actual results to
differ  from  those expressed in the forward-looking statements are contained in
the  Company's  reports,  including  its Annual Report on Form 10-K for the year
ended  December  31,  2008,  and  other filings with the Securities and Exchange
Commission.  The  Company  assumes  no  obligation  to  update  forward-looking
statements to reflect actual results, changes in assumptions or changes in other
factors  affecting  forward-looking information except to the extent required by
applicable  securities  laws.