In conjunction with the Florida Department of Environmental Protection (FDEP), Suwannee River Water Management District (SRWMD) is initiating rulemaking in accordance with Section 5 of Chapter 2020-150, Laws of Florida, to update the stormwater design and operation regulations adopted under Section 373.4131, F.S., using the most recent scientific information available. The purpose of this rulemaking is to remove stormwater quality criteria from SRWMD’s Environmental Resource Permit (ERP) Applicant’s Handbook Volume II (incorporated by reference in rule 40B-400.091, F.A.C.) so that the requirements can be consolidated in FDEP’s Chapter 62-330, F.A.C., and its ERP Applicant’s Handbook Volume I, and apply consistently statewide. Additionally, the 40B-400.091 rulemaking will remove documents incorporated by reference that are not referred to in the rule text; and the SRWMD ERP Applicant’s Handbook Volume II rulemaking will eliminate the requirement to analyze the 100-year frequency of the 3-day, 7-day, and 10-day storm durations for stormwater systems, eliminate rule language that is duplicative of FDEP’s rules, and add clarifying rule language. The effect will be more streamlined, consistent, and understandable rules; and stormwater design criteria that are more consistent with other water management districts and reduced regulatory burdens.