What are some indicators of lead contamination in water?

Lead contamination in water can be identified through specific indicators that signal the presence of lead and potential health risks. The correct choice highlights three crucial indicators: lead service lines, lead-containing plumbing fixtures, and elevated lead levels detected during water testing.

Lead service lines are pipes that connect the water main to buildings and are made from lead. If a water supply has these service lines, it is highly susceptible to lead leaching, especially if the water is corrosive. Plumbing fixtures, such as faucets or valves, can also contribute to lead contamination if they are made from or contain lead. Regular water testing is essential to measure lead levels; elevated findings indicate that lead is present in the water supply, warranting further action.

Other options do not effectively signal lead contamination. For example, standard plumbing materials may refer to a variety of pipes and fixtures but do not specifically indicate the presence of lead. The presence of iron pipes does not directly correlate with lead contamination, as iron is a different material. Low water temperatures can impact the solubility and leaching of metals but are not a specific indicator of lead itself. Thus, knowing these indicators is critical for assessing and ensuring safe drinking water.