Onarheim Services is located in Yreka, California, along the I-5 Corridor. Our business was established in 1995, providing Drug and Alcohol testing for mandated commercial employers, non-mandated employers, and individuals.  We provide complete consortium services and collection services for other employers and consortiums.

Staff includes Gary Longmore and Jennie Onarheim.  Both are certified Collectors and Breath Alcohol Technicians.  Onarheim Services maintains membership with DATIA, Drug and Alcohol Testing Industry Association, to stay current on training and industry changes.

Our Team


Jennie is ready to meet your needs with friendly, competent service.

  • Conveniently located off I-5
  • Appointments accepted, not necessary
  • Truck parking available
  • After-Hours testing available


With over 30 years in the transportation industry, Gary has exceptional customer service skills.