Potable Water: What Counts as Safe Water for Food

Potable water is water that is safe to drink: it meets Australian drinking-water quality and is free of harmful microorganisms and chemical contaminants. Under the Australia New Zealand Food Standards Code, any water a food business uses for preparing food, making ice, washing produce or cleaning food-contact surfaces must be potable. If your supply is not connected town water, you must confirm through testing and treatment that it is safe before it touches food. Key takeaways: Potable water is water safe to drink to Australian drinking-water quality; only potable water may be used for food, ice, produce washing and cleaning food-contact surfaces.. Connected town (reticulated) mains water is treated to drinking-water quality at the source, so it is generally accepted as potable at the tap.. Rainwater, bore, tank, spring and carted water are not automatically safe; you must test and, where needed, treat them and keep records to show they meet drinking-water quality.. Ice and steam that contact food must be made from potable water, because freezing and boiling do not reliably remove all contaminants.. Backflow prevention and protected plumbing stop contaminated water from being drawn back into your clean supply.. What potable water actually means Potable water is water that is safe for people to drink. In practice that means it meets Australian drinking-water quality: it contains no harmful microorganisms such as bacteria, viruses or protozoa, and no chemical contaminants at levels that could make someone ill. Water can look perfectly clear and still be unsafe, because the pathogens and chemicals that matter are invisible. Clarity, smell and taste are not proof that water is potable. The opposite of potable is non-potable water, meaning water that is not confirmed safe to drink. Non-potable water still has legitimate uses in some settings, such as certain firefighting or external cleaning tasks, but it must never touch food, food-contact surfaces, or anything that ends up in food. The core rule for food businesses is simple: if water will come into contact with food in any way, it must be potable. Potable means confirmed safe to drink, judged against drinking-water quality, not against how the water looks or tastes.. Non-potable water is water not confirmed safe; it must be kept entirely separate from food and food-contact surfaces.. Water carries pathogens (such as bacteria, viruses and protozoa) and chemicals that you cannot see, smell or taste.. Where the Food Standards Code requires potable water The Australia New Zealand Food Standards Code sets the food-safety requirements for premises and equipment, most relevantly in Standard 3.2.3 (Food Premises and Equipment) alongside the general food-handling and hygiene duties in Standard 3.2.2. A food business must have access to a supply of potable water sufficient for the activities it carries out, and must use potable water wherever water contacts food. That covers far more than the water in a jug on the table. Potable water is required for washing and preparing ingredients, making up recipes and drinks, producing ice, generating steam that contacts food, washing and sanitising utensils, equipment and food-contact surfaces, and for staff handwashing. If any of these steps uses water that is not potable, the food or surface can be contaminated even when every other control is done correctly. Standard 3.2.3 requires food premises to have access to a supply of potable water adequate for the business's activities.. Potable water is needed for food preparation, drinks, ice, food-contact steam, equipment and surface cleaning, and handwashing.. Using non-potable water at any of these points can contaminate food no matter how careful the rest of your process is.. Town water versus alternative water sources Most food businesses on a reticulated (connected town) mains supply can treat their water as potable at the tap, because the water utility treats and monitors it to drinking-water quality before it reaches you. Your responsibility is then to protect that water inside your own premises so it stays clean between the meter and the point of use. Businesses that rely on an alternative source cannot make the same assumption. Rainwater from a roof, bore or groundwater, tank storage, spring water and carted (delivered) water can all carry microbial or chemical contamination from the catchment, the storage, animals, roofing materials, soil or the delivery vehicle. These sources are not automatically potable. You must establish that the water meets drinking-water quality and keep it that way, which usually means a combination of source protection, treatment and regular testing. Reticulated town mains: treated to drinking-water quality by the supplier; your job is to protect it within the premises.. Rainwater and tank water: can be contaminated by roofing, debris, animals and birds; needs protection, treatment and testing.. Bore and spring water: can carry microbes, nitrates, heavy metals or other chemicals from the ground; test before use.. Carted water: confirm it comes from a potable source and is transported in clean, dedicated, food-grade tanks.. Ice, steam and water that touches food Ice is food. Because ice goes directly into drinks and is used to chill and display food, it must be made from potable water and handled with the same care as any ready-to-eat food. Freezing does not kill pathogens; it only pauses them, so ice made from unsafe water stays unsafe, and it thaws straight into whatever it is chilling. Steam that contacts food, for example steam ovens, steamers and some cleaning processes on food-contact surfaces, must also be generated from potable water. Boiling reduces many microbes but does not remove chemical contaminants, and steam systems can concentrate or carry over impurities. The same principle applies to water used to reconstitute foods, to top up cooking, or to rinse produce that will be eaten raw: if it touches food, it must be potable. Ice must be made from potable water; freezing pauses pathogens rather than destroying them.. Store and scoop ice hygienically with a dedicated scoop, never with hands or a glass, to avoid recontaminating it.. Steam that contacts food or food-contact surfaces must be generated from potable water.. Water used to wash ready-to-eat produce, reconstitute foods or top up cooking must also be potable.. Testing, treatment and record keeping If you rely on a non-mains supply, you need evidence that your water is safe, not just a belief that it is. That evidence comes from testing water quality against drinking-water parameters, treating the water so it consistently meets those parameters, and recording what you did so you can demonstrate it to an authorised officer. Treatment options depend on the source and the risk. Filtration removes sediment and some organisms, disinfection (such as chlorination or UV treatment) targets microorganisms, and other treatments address specific chemical issues. Whatever system you use needs to be maintained and monitored, because a treatment unit that is not serviced can quietly stop working. Keep test results, maintenance logs and supplier documentation together as part of your food safety records. Test alternative water against drinking-water quality parameters, and re-test on a regular schedule and after any event that could affect the source.. Match treatment (filtration, disinfection such as UV or chlorination, and chemical treatment) to the specific risks in your source.. Maintain and monitor treatment equipment so it keeps working; an unserviced unit can fail silently.. Keep test results, treatment and maintenance logs, and carted-water supplier documents as part of your food safety records.. Protecting your supply with backflow prevention Even genuinely potable water can become unsafe inside your premises if contaminated water is drawn back into the clean supply. This is called backflow, and it can happen when pressure drops in the mains and dirty water is siphoned backwards, for example from a hose left sitting in a sink or bucket, or from equipment connected directly to the water line. Backflow prevention keeps clean and dirty water apart. The simplest protection is an air gap: a physical vertical space between the tap outlet and the highest possible level of dirty water, so nothing can be sucked back up. Where an air gap is not practical, backflow prevention devices are fitted to the plumbing. Keep hoses off the floor and out of sinks, do not submerge outlets, and have any backflow devices installed and tested by a licensed plumber in line with local requirements. Backflow draws contaminated water into the clean supply when line pressure drops.. Maintain an air gap between tap outlets and any sink, bucket or equipment holding dirty water.. Never leave hose ends sitting in sinks, buckets, floor wells or chemical containers.. Backflow prevention devices should be installed and tested by a licensed plumber to the required standard.. If your water may be unsafe Sometimes you learn your water might be compromised: a boil-water notice from the supplier, a failed test result, flooding or contamination affecting your source, or a treatment system that has failed. When that happens, stop using the suspect water for anything that touches food until it is confirmed safe again. Switch to a known-safe alternative in the meantime, such as commercially bottled water or water from a confirmed potable source, for food preparation, drinks and ice. Discard ice made during the affected period, because it was frozen from the suspect water. Follow any instructions from your water supplier or public health authority, and resume normal use only once testing or the lifting of a notice confirms the water is potable again. Requirements and who you notify can vary, so confirm the specifics with your local council or state or territory regulator. Stop using suspect water for food, drinks, ice and food-contact cleaning until it is confirmed safe.. Use a known-safe alternative such as commercially bottled or confirmed potable water in the meantime.. Discard ice made from water during the affected period.. Follow supplier and public health advice, and confirm notification requirements with your local council or state regulator.. Checklist: Confirm your water source and whether it is reticulated mains or an alternative supply.. Use only potable water for food, drinks, ice, food-contact steam, produce washing, and cleaning food-contact surfaces.. For non-mains water, test against drinking-water quality parameters and treat as needed.. Maintain and monitor any filtration or disinfection equipment on a schedule.. Make ice from potable water and store and scoop it hygienically.. Maintain air gaps and have backflow prevention devices installed and tested by a licensed plumber.. Keep water test results, treatment logs and carted-water supplier records with your food safety records.. Have a plan to switch to safe water and discard affected ice during a boil-water notice or failed test.. Common mistakes: Assuming water is safe because it looks clear, smells fine and tastes normal, when pathogens and chemicals are invisible.. Making ice from a non-mains supply that has not been tested and treated.. Leaving hose ends sitting in sinks, buckets or chemical containers, creating a backflow contamination path.. Using non-potable water for washing produce that will be eaten raw, or for rinsing equipment and food-contact surfaces.. Installing a treatment unit and then never servicing it, so it fails silently.. Keeping no records, leaving you unable to demonstrate your water is potable to an authorised officer.. Continuing to use water during a boil-water notice, or keeping ice that was frozen from the affected supply..