What sanitizing solution concentration is recommended for a three-compartment sink?

• A. Chlorine-based chemical sanitizing at 50 PPM
• B. 200 PPM
• C. 10 PPM
• D. 150 PPM

Answer: (A)

The key idea is using a chlorine-based sanitizer at a moderate concentration in the third-compartment sink to reliably disinfect items without causing safety or residue issues. Fifty parts per million is the standard target because it provides effective microbial kill with the typical contact time required for sanitizing, assuming the surface is clean and the solution is properly maintained. Higher concentrations, like 150–200 ppm, aren’t needed for routine sanitizing and can increase the risk of taste, odor, and corrosion concerns. A much lower level, such as 10 ppm, wouldn’t achieve adequate disinfection. So, 50 ppm is the best choice to balance effectiveness and safety. Be sure to monitor with a test kit and follow the sanitizer’s label for accurate use.