WPDES Municipal Stormwater Permit

Public Education and Outreach

The City of Manitowoc must implement a public education and outreach program to increase awareness of storm water pollution impacts on waters of the state to encourage changes in public behavior to reduce such impacts. The program must include the following elements:

• Promote detection and elimination of illicit discharges from municipal separate storm sewer systems.
• Inform and educate the public about the proper management of materials that may cause storm water pollution from sources including automobiles, pet waste, household hazardous waste and household practices.
• Promote beneficial on site reuse of leaves and grass clippings and proper use of lawn and garden fertilizers and pesticides.
• Promote management of stream banks and shorelines by riparian landowners to minimize erosion and restore and enhance the ecological value of waterways
• Promote infiltration of residential storm water runoff from rooftop downspouts, driveways and sidewalks.
• Inform and where appropriate educate those responsible for the design, installation, and maintenance of construction site erosion control practices and storm water management facilities on how to design, install and maintain the practices.
• Identify businesses and activities that may pose a storm water contamination concern, and where appropriate, educate specific audiences on methods of storm water pollution prevention.
• Promote environmentally sensitive land development designs by developers and designers.

Public Involvement and Participation

The City must implement a program to notify the public of activities required by this permit and to encourage input and participation from the public regarding these activities. This program must comply with applicable state and local public notice requirements.

Illicit Discharge Detection and Elimination

The City must develop, implement and enforce a program to detect and remove illicit connections and discharges to the MS4. The program must include all of the following:

• An ordinance or other regulatory mechanism to prevent and eliminate illicit discharges and connections to the MS4. At a minimum, the ordinance or other regulatory mechanism shall:
  • Prohibit the discharge, spilling or dumping of non-storm water substances or materials into waters of the state or the MS4.
  • Identify non-stormwater discharges or flows that are not considered illicit discharges.
  • Establish inspection and enforcement authority.
• Initial field screening at all major outfalls during dry weather periods.
• On-going dry weather field screening of outfalls.
• Procedures for responding to known or suspected illicit discharges.
• Action to remove illicit discharges from its MS4 system as soon as possible.

Construction Site Pollution Control

The City must develop, implement and enforce a program to reduce the discharge of sediment and construction materials from construction sites. The program must include:

• An ordinance or other regulatory mechanism to require erosion and sediment control at construction sites and establish sanctions to ensure compliance.
• Procedures for construction site inspection and enforcement of erosion and sediment control measure.

NEW Request for authority from the Wisconsin Department of Commerce to regulate erosion control

Check out the Contractor's Page for Construction Site Erosion Control Information.

Post-Construction Storm Water Management

The City must develop, implement and enforce a program to require control of the quality of discharges from areas of new development and redevelopment, after construction is completed. The program must include:

• An ordinance or other regulatory mechanism to regulate post-construction storm water discharges for new development and redevelopment.
• Procedures that will be used by the City to ensure the long-term maintenance of storm water management facilities.

Check out the Contractor's Page for Post-Construction Stormwater Management Information.

Pollution Prevention

The City must develop and implement a pollution prevention program. The program must include:

• Routine inspection and maintenance of municipally owned or operated structural storm water management facilities to maintain their pollutant removal operating efficiency.
• Routine street sweeping and cleaning of catch basins with sumps.
• Proper application of road salt or other deicers.
• Proper management of leaves and grass clippings, which may include on-site beneficial reuse as opposed to collection.
• Storm water pollution prevention planning for municipal garages, storage areas and other sources of storm water pollution from municipal facilities.
• Application of lawn and garden fertilizers on municipally controlled properties.
• Education of appropriate municipal and other personnel involved in implementing this program.
• Reduce municipal sources of storm water contamination within source water protection areas.

Stormwater Quality Management

The City must develop and implement a municipal storm water management program. The goal of this program must achieve, to the maximum extent practical, a 20% reduction in Total Suspended Solids (TSS) discharging to the MS4 to surface waters by March 10, 2008 and a 40% reduction in TSS by March 10, 2013.

Assessment of compliance with the 20% and 40% reduction shall be determined by conducting a pollutant-loading analysis using a model such as SLAMM, P8 or equivalent methology approved by the DNR.

Storm Sewer System Map

The City must develop and maintain a MS4 map. The map must include:

• Waters of the state, name and classification of receiving water(s), identification of whether the receiving water is an ORW, ERW or listed as an impaired water, storm water drainage basin boundaries for each MS4 outfall and municipal separate storm sewer conveyance systems.
• Known threatened or endangered resources, historical property and wetlands.
• Known MS4 outfalls discharging to waters of the state.
• Location of any known discharge to the MS4 that has been issued WPDES permit coverage by the department.
• Location of municipally owned or operated structural storm water management facilities.
• Publicly owned parks, recreational areas and other open lands.
• Location of municipal garages, storage areas and other public works facilities.
• Streets

Annual Report

The City must submit an annual report to the DNR. The City must invite the municipal governing body, interest groups and the general public to review and comment on the annual report. The report must include:

• The status of implementing the permit requirements, status of meeting program goals and compliance with permit schedules.
• A fiscal analysis, which needs to include annual expenditures and budget for the reporting year and the budget for the next year.
• A summary of the number and nature of inspections and enforcement actions conducted to ensure compliance with the required ordinances.
• Indicate any know water quality improvements or degradation in the receiving water to which the MS4 discharges.