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MS4 - Minimum Control Measures

There are six MS4 program elements, termed "minimum control measures" that, when implemented, are expected to result in significant reductions of pollutants discharged into receiving waters.

1. Public Education and Outreach on Stormwater Impacts.

The City is required to educate the public about the impacts polluted stormwater runoff discharges can have on water quality. You may have noticed information on GOTV about keeping storm drains clean and cleaning up pet waste. Our City website also has information about stormwater management.

2. Public Involvement and Participation.

Providing opportunities for citizens to participate in program development and implementation. The City has established a Stormwater Advisory Committee. The City Engineering Department, in cooperation with student groups, has organized watershed cleanup projects.

3. Illicit Discharge Detection and Elimination.

Developing and implementing a plan to detect and eliminate illicit discharges to the storm sewer system. This includes developing a system map and informing the community about hazards associated with illegal discharges and improper disposal of waste. Smoke Testing is one method the City is using to locate and map discharges. Measures prohibiting illicit discharges were adopted into the City Code in July 2006.

4. Construction Site Stormwater Runoff Control.

Developing, implementing, and enforcing an erosion and sediment control program for construction activities that disturb 1 or more acres of land (controls could include silt fences and temporary stormwater detention ponds). The City Council passed this into law in January 2007.

5. Post-Construction Stormwater Management.

Developing, implementing, and enforcing a program to address discharges of post-construction stormwater runoff from new development and redevelopment areas. These controls include things like creating stormwater retention ponds and erosion preventative like structural swales. The City Council approved adding these requirements to the City Code in March 2008.

6. Pollution Prevention and Good Housekeeping.

Developing a program with the goal of preventing or reducing pollutant runoff from municipal operations. Activities like regular street sweeping and cleaning storm catch basins are a part of this.

For More Information

Public Works
550 Gateway Dr.
Ottumwa, Iowa 52501
(641) 684-2180

Department Website

Map to Public Works

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