2021 Regional Water Plans & Previous Plans 2021 Regional Water Plans 2021 Regional Water Plans for 16 Regions 2016 Regional Water Plans 2016 Approved Regional Water Plans for 16 Regions 2011 Regional Water Plans 2011 Approved Regional Water Plans for 16 Regions Region-Specific Studies for 16 Regions 2006 Regional Water Plans 2006 Approved Regional Water Plans for 16 Regions 2001 Regional Water Plans 2001 Approved Regional Water Plans for 16 Regions