MODFLOW Version 6.2.2
This is the approved USGS MODFLOW 6.2.2 release.
Langevin, C.D., Hughes, J.D., Banta, E.R., Provost, A.M., Niswonger, R.G., and Panday, Sorab, 2021, MODFLOW 6 Modular Hydrologic Model version 6.2.2: U.S. Geological Survey Software Release, 30 July 2021, https://doi.org/10.5066/F76Q1VQV
Visit the USGS "MODFLOW and Related Programs" site for information on MODFLOW 6 and related software: https://water.usgs.gov/ogw/modflow/