Copyright in epanet2toolkit is held by IBM Corp. 2017 except as noted below.  

Copyright in the following files is held by Open Water Analytics 2017:
src/enumstxt.h
src/epanet.c
src/epanet2.h              
src/funcs.h                      
src/hash.c   
src/hash.h   
src/hydraul.c
src/input1.c 
src/input2.c 
src/input3.c 
src/inpfile.c
src/mempool.c  
src/mempool.h
src/output.c 
src/quality.c
src/report.c
src/rules.c
src/smatrix.c 
src/text.h
src/types.h
src/vars.h