What defines the term 'potable water' in plumbing standards?

The term 'potable water' is defined as water that is safe for drinking and cooking. This definition is critical in plumbing standards to ensure that the water supply meets health safety regulations, preventing the spread of waterborne diseases. Potable water must be treated and maintained to a quality that is free from harmful contaminants, making it suitable for human consumption.

Other options may involve specific uses of water but do not encompass the comprehensive requirement for safety that potable water demands. For instance, while chlorinated water (the first option) can be made safe by disinfecting it, not all chlorinated water necessarily meets the standards for drinking. Water used for irrigation (the third option) is often not safe for consumption due to potential pesticide or fertilizer contamination. Lastly, recycled water (the fourth option) is treated for various purposes but may not always be appropriate for drinking and cooking without additional processing. Therefore, the definition that emphasizes safety for human consumption is the most accurate and relevant in plumbing standards.