MS4 Information

According to the federal law commonly known as Stormwater Phase II, permits will be required for stormwater discharges from Municipal Separate Storm Sewer Systems (MS4s) in urbanized areas and for construction activities disturbing one or more acres. To implement the law, the Department has developed two general permits, one for MS4s in urbanized areas and one for construction activities. The permits are part of the State Pollutant Discharge Elimination System (SPDES). Operators of regulated MS4s and operators of construction activities must obtain permit coverage under either an individual SPDES permit or one of the general permits no later than March 10, 2003 or prior to commencement of construction.

More about MS4 Information:

• Stormwater Management Guidance Manual for Local officials (September, 2004) - Guidance for local officials on complying with state and federal stormwater management requirements, Minimum Measures 4 and 5
• Additional MS4 tools and Resources - Information about NYSDEC's Stormwater Management program
• MS4 Program Assistance Documents - MS4 Program Guidance Documents
• Partners Available for Assistance to MS4s - MS4 Partners and other groups that may be available for assistance