NWFWMD ERP Stormwater Retention Volume Calculator

📘 Project Information

Project Name

Enter the official project name as it appears on permit application

Total Project Area (acres)

Total area of the project parcel

New Impervious Surface Area (sq. ft)

Include buildings, pavement, and other surfaces that prevent infiltration

Soil Type

Based on NRCS hydrologic soil group classification

Basin Designation

Check NWFWMD basin maps for designation

Receiving Waters

Type of water body receiving discharge

Project is over 1 acre (auto-calculated)

Applicable Ruleset Version

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Enter your project information to calculate stormwater retention requirements