SWPPP and Stormwater Permits: frequently asked questions
These answers are general. For your situation, check the official sources listed below or ask a professional.
When is a SWPPP required?
For construction disturbing one acre or more, or less if part of a larger common plan.
Who issues the permit?
Most states run their own program; EPA issues it in a few states and territories.
How often are inspections done?
Typically weekly or every two weeks and after significant storms, per the permit.