Stormwater Management

NPDES Stormwater Program

According to the 1996 National Water Quality Inventory, stormwater runoff is a leading source of water pollution.

Stormwater runoff can harm surface waters such as rivers, Do Your Part, Keep Water at Heartlakes, and streams which in turn cause or contribute to water quality standards being exceeded.

The National Pollutant Discharge Elimination System (NPDES) was developed by the federal government and is being implemented through local and state government to address environmental problems created by uncontrolled runoff from developing properties. The City of Hutchinson has many rules and regulations to both follow and enforce. The Minnesota Pollution Control Agency (MPCA) coordinates the states Stormwater Program. Stormwater runoff can change natural hydrologic patterns, accelerate stream flows, destroy aquatic habitats, and elevate pollutant concentrations and loadings. Development substantially increases impervious surfaces thereby increasing runoff from city streets, driveways, parking lots, and sidewalks, on which pollutants from human activities settle.  Common pollutants in runoff include pesticides, fertilizers, oils, metals, pathogens, salt, sediment, litter and other debris. These pollutants are transported by stormwater and discharged – untreated to water resources through storm sewer systems.

NPDES MS4 Stormwater Program

The City of Hutchinson is now required to operate with a Minnesota NPDES Municipal Separate Storm Sewer System (MS4) permit.

MS4s designated by rule are cities and townships with a population of at least 10,000; and cities and townships with a population of at least 5,000 and discharging or the potential to discharge to valuable or polluted waters.

As a designated MS4, the City of Hutchinson was required to obtain permit coverage as of February 15, 2007.

The City of Hutchinson’s permit contains a Stormwater Pollution Prevention Program that includes 6 Minimum Control Measures (MCMs):
  • Public education and outreach;
  • Public participation/involvement;
  • Illicit discharge, detection and elimination;
  • Construction site runoff control;
  • Post-construction site runoff control; and
  • Pollution prevention/good housekeeping

Best Management Practices (BMPs) that apply to each MCM are implemented to reduce the amount of sediment and pollution that enters surface and ground water from storm sewer systems to the maximum extent practicable.


HANDBOOK FOR WATER, WASTEWATER, & STORM WATER UTILITIES

 

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