Biohazard, Trauma and Crime Scene Cleanup Services in Washington County, Missouri

Bio-One is always prepared to remedy situations that arise from unexpected events such as death, traumatic injury, and hazardous situations. We deploy our teams quickly so you can focus on all the other necessary arrangements to begin the healing process.

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Facts about Washington County, Missouri

Washington County is a county located in the eastern portion of the U.S. state of Missouri. As of the 2010 census, the population was 25,195. The largest city and county seat is Potosi. The county was officially organized on August 21, 1813, and was named in honor of George Washington, the first President of the United States.


The French explorers Renault and La Motte entered the area of present-day Potosi in 1722-23. However, no permanent settlements were made until 1763, when François Breton settled near Potosi and began to operate a mine bearing his name. The Bellview Valley, near Caledonia and Belgrade, was settled in 1802 by the families of Annanias McCoy, Benjamin Crow, and Robert Reed. Washington County was officially organized on August 21, 1813, out of Ste. Genevieve County.


According to the U.S. Census Bureau, the county has a total area of 762 square miles (1,970 km²), of which 760 square miles (2,000 km²) is land and 2.6 square miles (6.7 km²) (0.3%) is water.


As of the census of 2000, there were 23,344 people, 8,406 households, and 6,237 families residing in the county. The population density was 31 people per square mile (12/km²). There were 9,894 housing units at an average density of 13 per square mile (5/km²). The racial makeup of the county was 95.47% White, 2.48% Black or African American, 0.66% Native American, 0.15% Asian, 0.01% Pacific Islander, 0.15% from other races, and 1.08% from two or more races. Approximately 0.73% of the population were Hispanic or Latino of any race.

Serving Washington County, Missouri


Bio-One services all types of trauma, distressed property, and biohazard scenes in communities throughout St. Louis Area. We partner with local authorities, communities, emergency services personnel, victim services groups, hoarding task forces, apartment complexes, insurance companies and others to provide the most efficient and superior service possible.

We are your crime scene cleaners dedicated to assisting law enforcement, public service agencies and property owners/managers in restoring property that has been contaminated as a result of crime, disaster or misuse.

  • We have fielded thousands of calls and recovered just about any situation out there in a professional and compassionate matter. 
  • We are Licensed, Bonded, and Insured.
  • We maintain strict adherence to OSHA rules and regulations to ensure the safety of our workers, the public, and of you and your family.
  • We are proud to have a great working relationship with the Police, Fire, and most Insurance Agencies.

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