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NPDES PH II Permit
STATE OF IOWA NPDES PHASE II STORM WATER PERMITTING
The U.S. Environmental Protection Agency has published final regulations for National Pollutant Discharge Elimination System (NPDES) Phase II Storm Water Permitting (40CFR parts 122 and 123). Included in the Federal Register is a listing of municipalities which will be required to comply with the regulations. The Iowa Department of Natural Resources (IDNR) has issued Draft "Individual Permits" which cover the municipal separate storm sewer system (MS4) of these municipalities. The IDNR Permit application contains information that will direct the municipal compliance efforts for a period of five years following issuance, at which time the permit would need to be renewed. The Draft "Individual Permit" addresses the proposed regulatory requirements through a storm water discharge control program that specifies Best Management Practices (BMP) that meets the requirements of six minimum control measures. These six minimum control measures are designed to reduce pollutants to the Maximum Extent Possible (MEP) to protect water quality. The six minimum control measures are as follows:
• Public Education and Outreach
• Public Involvement and Participation
• Illicit Discharge Detection and Elimination
• Post-Construction Storm Water Management in New Development and redevelopment 
• Pollution Prevention and Good Housekeeping for Municipal Operations.
• Construction Storm Water Management.
 
Each minimum control measure has "mandatory components" that must be addressed in the IDNR Permit, as well as "suggested components" that are deemed desirable by the USEPA/IDNR and would be voluntary on the part of the municipality. These six minimum controls measures are final at the present time, but may be modified by the Federal Government or the IDNR permitting authority. The released IDNR Draft permits for regulated MS4 are attached below for your review.

IDNR NPDES Permit


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