Comparison of Treatment Standards
Previous vs. New Stormwater Requirements
The revised stormwater treatment standards represent a significant evolution from previous criteria, introducing more nuanced requirements based on watershed characteristics and water quality designations.
| Water Classification | Treatment Standard |
|---|---|
| Standard Waters | Post ≤ Pre, OR TP: 80% & TN: 55%, whichever is greater |
| OFW Waters | Post ≤ Pre, OR TP: 90% & TN: 80%, whichever is greater |
| Impaired Waters | Post ≤ Pre, OR TP: 80% & TN: 80%, whichever is greater AND Post < Pre for impaired parameters |
| Impaired OFW | Post ≤ Pre, OR TP: 95% & TN: 95%, whichever is greater AND Post < Pre for impaired parameters |
| TMDL/BMAP Waters | TMDL/BMAP standards apply |
| Redevelopment | TP: 80% & TN: 45% TP: 90% & TN: 60% for OFWs |
ⓘ Key Terminology
TP: Total Phosphorus | TN: Total Nitrogen | OFW: Outstanding Florida Waters | TMDL: Total Maximum Daily Load | BMAP: Basin Management Action Plan
These standards provide a comprehensive framework that addresses different levels of environmental sensitivity while maintaining flexibility for redevelopment projects and areas with specific management plans.