FDEP Adopts WQEA and Regional Stormwater Rules, Effective November 19
On October 30, 2026, the Florida Department of Environmental Protection (DEP) filed final rules with the Department of State. The rules govern Water Quality Enhancement Areas (WQEAs) and Regional Stormwater Management Systems (RSMSs). The WQEA and RSMS rules also govern Master Stormwater Management Systems.
An administrative challenge to portions of the proposed rules ended by voluntary dismissal on October 22, 2026. As a result, the rules take effect November 19, 2026.
The WQEA and RSMS rules implement Section 373.4134, Florida Statutes. SB 848 (Chapter 2026-60, Laws of Florida) amended that statute. In addition, the rules finalize the earlier rulemaking.
MBG summarized this rulemaking in Florida’s Water Quality Enhancement Areas: What the New ERP Rule Means for Developers and Consultants.
What’s Changing
- Chapter 62-332, F.A.C. (new): This new Florida Administrative Code chapter creates the WQEA Environmental Resource Permit (ERP). It also sets requirements for enhancement credits, service areas, perpetual preservation, credit ledgers, monitoring, financial responsibility, and enforcement.
- Chapters 62-330 and 62-4, F.A.C. (amended): These chapters add WQEAs to the ERP application and as a permit type. In addition, they establish WQEA application processing fees.
- ERP Applicant’s Handbook Volume I (updated): This update revises Section 9.7, Compensating Stormwater Treatment. The revisions include provisions for master systems, RSMSs, and WQEAs.
How WQEA Credits Work
An enhancement credit is a standard unit representing a quantity of pollutant removed by a WQEA. Applicants may use released credits in three ways:
- To achieve net improvement under Section 373.414(1)(b)3., F.S.
- To satisfy ERP stormwater performance standards
- To meet an adopted Basin Management Action Plan (BMAP) or Reasonable Assurance Plan allocation
A governmental entity may own a WQEA for its own water quality needs. However, it may not sell credits to third parties.
Each WQEA service area must cover at least a Hydrologic Unit Code (HUC) 8 sub-basin. In addition, the credit purchaser’s project must be inside the service area. The project must also have a hydrologic connection to the WQEA.
A Locational Valuation Factor, which is a location-based multiplier, adjusts the number of credits required. That factor is never below 1.0. In addition, purchasing credits is voluntary.
For a deeper look at the mechanics, see Water Quality Enhancement Areas & Credit Trading Rules.
Regional and Master Stormwater Systems
Under the updated Handbook, an RSMS creates pollutant reduction allocations. ERP applicants within its drainage area may use those allocations to meet stormwater treatment requirements. The drainage area is generally a HUC 12 subwatershed.
An RSMS that sells allocations to third parties must show financial, legal, and administrative capability. It must also provide an endowment or other long-term financial assurance for operation and maintenance.
In addition, a ledger attached to the permit tracks allocations in pounds or kilograms of pollutant removed. Finally, a master system may not sell allocations to third parties unless a separate RSMS permit authorizes it.
For the statutory background, see SB 848 Makes Regional Stormwater Treatment a Standard Compliance Tool in Florida.
What This Means for Project Planning
Therefore, project teams preparing ERP applications should review the revised Handbook, particularly Section 9.7, before November 19. For impaired waters, applicants must still achieve net improvement at the project site first. Only then may they use compensating stormwater treatment, including WQEA credits or RSMS allocations.
Key Dates
- October 22, 2026: Administrative challenge voluntarily dismissed
- October 30, 2026: Final rules filed with the Department of State
- November 19, 2026: Rules take effect
Additional Resources
- FDEP Water Quality Enhancement Area Rulemaking
- Florida Administrative Code Chapter 62-332
- ERP Stormwater Resource Center
Have questions about how the new WQEA and RSMS rules could affect your project’s stormwater treatment strategy or credit needs? Contact The Mitigation Banking Group for guidance.
Source: Florida Department of Environmental Protection, Water Quality Enhancement Area Rulemaking; Chapter 62-332, F.A.C., effective November 19, 2026; ERP Applicant’s Handbook Volume I (October 2026); Florida Association of Mitigation Bankers member notice, November 9, 2026.
