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CITY, N.D. (NewsDakota.com) City Administrator David Schelkoph is asking residents to refrain from disposing their cooking oil and baby wipes down the city sewer system.

Schelkoph says more residents are disposing of these materials and it hinders the operating efficiency of the master lift station in Valley City.

Schelkoph says a media campaign will be launched to educate city residents on what materials should not be flushed down the toilet or put down the drains in their home.