When selecting a sampling point, what type of faucet should be avoided?

When selecting a sampling point, a kitchen sink faucet that swivels should be avoided because it may not provide a consistent and reliable sample. These types of faucets can introduce contaminants due to their design and the potential for standing water or backflow from various angles. Swiveling mechanisms can also lead to variations in water quality if water is pulled from different directions or if the faucet is not positioned correctly. In contrast, other types of faucets, like high-pressure or outdoor hose bibs, can be more confined and may maintain a more consistent flow, which can be beneficial for water sampling. A knee-operated faucet, while possibly less common, also offers a low-touch interface that minimizes contamination risks. Overall, the primary concern with a swiveling faucet centers around the integrity and reliability of the water sample collected.