A sewer line leak of 25,000 gallons led the Anne Arundel County Health Department to post an emergency closing Friday of Stony Run, a small creek in Linthicum and Hanover.

A blockage or buildup of materials caused the leak near Science Drive in Linthicum, said Matt Diehl, a Public Works Department spokesman. The waterway is closed from there to the Patapsco River.

Anyone who touches the water should wash well with soap and water, health department spokeswoman Elin Jones said, and clothing that comes into contact with that water should also be washed.