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Food Safety and Environmental Services

Food Equipment Cleaning and Sanitizing: Water Chemistry and Quality, Water Impurities

Table 1a - Common Impurities
Impurity Problem Caused
Oxygen Corrosion
Carbon Dioxide Corrosion
Bicarbonates (Sodium, Calcium or Magnesium) Scale
Chlorides or Sulfates (Sodium, Calcium or Magnesium) Scale & Corrosion
Silica Scale
Suspended Solids Corrosion and Deposition
Unusually high pH (above 8.5) Mediate Corrosion and Deposition; Alter detergent efficiency
Unusually low pH (below 5) Mediate Corrosion and Deposition; Alter detergent efficiency
Table 1b - Less Common Impurities
Impurity Problem Caused
Iron Filming and Staining
Manganese Corrosion
Copper Filming and Staining