What are the next statutory deadlines under SGMA? By admin Posted January 31, 2019 In What are the next statutory deadlines under SGMA?2019-01-312019-08-28/wp-content/uploads/2017/11/logo.pngKings River East/wp-content/uploads/2017/11/logo.png200px200px 0 On or before January 31, 2020, a groundwater sustainability plan for the basin must be submitted for review by DWR. (Water Code § 10723.2(2).) admin