The Official City of Norfolk Nebraska Home Page The Official City of Norfolk Nebraska Home Page

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309 N 5th St, Norfolk, NE 68701
Phone: (402) 844-2000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

Erosion

What is stormwater runoff?

Stormwater runoff occurs when precipitation from rain or snowmelt flows over the ground.  Impervious surfaces like driveways, sidewalks and streets prevent stormwater from naturally soaking into the ground.
 
 

Why is stormwater runoff a problem?

 Stormwater can pick up debris, chemicals, dirt and other pollutants and flow into a storm sewer system or directly to a lake, stream, river, wetland or coastal water. Anything that enters a storm sewer system is discharged untreated into the water bodies we use for swimming, fishing and providing drinking water.
Stormwater Runoff  
 


The Effects of pollution

Polluted stormwater runoff can have many adverse effects on plants, fish, animals and people.

  • Sediment can cloud the water and make it difficult or impossible for aquatic plants to grow. Sediment also can destroy aquatic habitats.
  • Excess nutrients can cause algae blooms. When algae die, they sink to the bottom and decompose in a process that removes oxygen from the water. Fish and other aquatic organisms can't exist in water with low dissolved oxygen levels.
  • Bacteria and other pathogens can wash into swimming areas and create health hazards, often making beach closures necessary.
  • Debris–plastic bags, six-pack rings, bottles and cigarette butts–washed into water bodies can choke, suffocate or disable aquatic life like ducks, fish turtles and birds.
  • Polluted stormwater often affects drinking water sources. This, in turn, can affect human health and increase drinking water treatment costs.