Municipal Separate Storm Sewer System (MS4) Program Evaluation Guidance

摘要

The National Pollutant Discharge Elimination System (NPDES) Municipal Separate Storm Sewer System (MS4) Program Evaluation Guidance (Guidance) is intended to assist State and NPDES permitting authority staff to: (1) Assess the compliance and effectiveness of Phase I and Phase II MS4 programs; (2) Develop Phase II MS4 stormwater management programs (SWMPs); (3) Assess pollutants of concern; (4) Provide technical assistance.