Water is part of the production process
At home and in commercial kitchens, water is used to wash ingredients, prepare soups and drinks, make ice, and clean utensils. In food production it can also contact products indirectly.
FAO and WHO recommend assessing the source, potential hazards, treatment effectiveness, and intended food use when deciding whether water is fit for purpose.
For everyday kitchen consumption and relevant food contact, use water meeting drinking-water requirements. Other water qualities or reused water require risk assessment, process controls, and compliance with applicable requirements.
Assess safety and product quality together
Water can appear clear and taste normal while carrying contaminants. Water meeting health requirements may still need adjustments for a particular product or machine.
Ask two questions: is it safe for this use, and are its characteristics appropriate for the product and equipment? Sensory assessment does not replace safety testing.
Effects on taste and aroma
Unwanted water taste or odour can affect food and beverages. In coffee, mineral composition and alkalinity can also influence the brew.
Alkalinity describes the capacity to neutralise acids and is different from pH. Changes can affect perceived coffee acidity. Brewing targets should be considered alongside equipment protection.
Coffee requirements should not be applied indiscriminately to all foods. Different recipes and processes may need different water characteristics.
A consistent supply supports consistent results
A change of source can change water characteristics. The main supply and backup tanker water, for example, may have different compositions.
When product quality changes, examine water alongside ingredients, quantities, temperature, processing time, and hygiene. Do not attribute a change to water without investigation.
A controlled comparison can help: use the same recipe, ingredients, and process conditions with water sources already confirmed suitable for food use.
Hygiene matters after treatment
Safe water can be recontaminated through containers, hoses, taps, or poorly maintained ice machines. Freezing should not be treated as a guarantee of water safety.
Management should include cleaning and sanitation at use points, hygienic ice handling, and separation of consumption water from utility lines. Reusing wash water for food contact requires appropriate controls.
Equipment has its own requirements
Coffee machines, heaters, boilers, and membrane equipment may require more specific water limits. Hardness and chemical composition can contribute to scale and performance problems.
Follow manufacturer specifications. For food boilers, consider steam contact with products and the suitability of treatment chemicals. Utility-water targets are not automatically appropriate for drinking water or product ingredients.
Questions for kitchen and production managers
- ✓Where is water an ingredient or in contact with food?
- ✓Has water for ice and final rinsing been assessed?
- ✓Is backup-supply quality known?
- ✓How are tanks, taps, hoses, and ice machines maintained?
- ✓What water specifications do equipment manufacturers require?
- ✓Are product-quality changes and maintenance recorded?
The ARS perspective
ARS treats water as part of food-process control. Assessment starts with the source and use points, then defines targets for safety, product consistency, and equipment protection. Results need to be checked at relevant points and maintained during operation.
Official references
This material provides general education. It does not replace laboratory testing, applicable local requirements, or a professional assessment of a specific water system.