Which dilution of bleach solution is commonly recommended by OSHA for disinfecting contaminated surfaces?

Which dilution of bleach solution is commonly recommended by OSHA for disinfecting contaminated surfaces?

• A. 1:10
• B. 1:2
• C. 1:5
• D. 1:50

Answer: (C)

Disinfection with bleach relies on using a concentration strong enough to inactivate pathogens on surfaces that may be contaminated with blood or bodily fluids, while also being safe for the materials you’re cleaning. In many athletic training and healthcare settings, a dilute bleach solution is prepared so you get reliable disinfection without the drawbacks of using straight household bleach. A 1:5 bleach-to-water mix yields roughly a 1% available chlorine solution. That level is commonly cited as effective for disinfecting surfaces that could be contaminated with bloodborne pathogens, providing a practical balance between microbial kill power and safety for surfaces and personnel. It’s strong enough to produce a rapid disinfecting effect, yet not as harsh as undiluted bleach. When using this approach, always prepare fresh solution, wear appropriate PPE, apply the solution to the surface, and maintain wetness for the recommended contact time specified on the product label. If surfaces are heavily soiled, pre-clean them first, and if the bleach you’re using has a different concentration, adjust the dilution accordingly to meet the needed disinfectant strength.

Disinfection with bleach relies on using a concentration strong enough to inactivate pathogens on surfaces that may be contaminated with blood or bodily fluids, while also being safe for the materials you’re cleaning. In many athletic training and healthcare settings, a dilute bleach solution is prepared so you get reliable disinfection without the drawbacks of using straight household bleach.

A 1:5 bleach-to-water mix yields roughly a 1% available chlorine solution. That level is commonly cited as effective for disinfecting surfaces that could be contaminated with bloodborne pathogens, providing a practical balance between microbial kill power and safety for surfaces and personnel. It’s strong enough to produce a rapid disinfecting effect, yet not as harsh as undiluted bleach.

When using this approach, always prepare fresh solution, wear appropriate PPE, apply the solution to the surface, and maintain wetness for the recommended contact time specified on the product label. If surfaces are heavily soiled, pre-clean them first, and if the bleach you’re using has a different concentration, adjust the dilution accordingly to meet the needed disinfectant strength.