The finite-volume companion to the EPA Storm Water Management Model (SWMM) was released as public domain code under the name SWMM5+ shortly after the EWRI World Congress 2023. In this presentation, we report on new developments and capabilities of the model. With the help of the SWMM community, the code has undergone trials and debugging. Bug fixes and code changes responding to the community have improved the model resiliency and ease-of-use.
