Sanitizer Concentration Guide + Free Chart
Sanitizer concentration refers to the amount of active sanitizing chemical in a solution. Proper concentration is critical—too little won't kill pathogens effectively, while too much can leave harmful residues or damage surfaces. FDA Food Code specifies required concentrations for approved sanitizers.
FDA-Approved Sanitizers & Concentrations
- Chlorine (Bleach): 50-100 ppm (parts per million)
- Quaternary Ammonia (Quat): 150-400 ppm (per manufacturer)
- Iodine: 12.5-25 ppm
Why Concentration Matters
- Too Weak: Pathogens survive, cross-contamination risk
- Too Strong: Chemical residue on surfaces, potential food contamination
- Just Right: Effective kill of pathogens, safe for food contact
Testing Sanitizer Concentration
Use test strips or kits matched to your sanitizer type. Dip strip into solution, compare color to chart. Test at least:
- When preparing a new batch
- At the start of each shift
- Every 4 hours during use
- When solution appears dirty
Factors Affecting Concentration
- Water Temperature: Hot water reduces chlorine effectiveness
- Organic Matter: Food debris neutralizes sanitizer
- Water Hardness: Affects quat sanitizer effectiveness
- pH: Affects all sanitizer types