Reality: The most common source of lead in drinking water is the plumbing in your home. Your plumbing may have lead pipes or lead solder in the connections. Lead is a contaminant that can be particularly harmful to pregnant women and young children. If you are concerned about lead in your water, contact your local health authorities to find out how you can have your water tested by a certified laboratory. If tests reveal that your water’s lead content is above 15 parts per billion, you should reduce your exposure to it. Since warm water absorbs more lead than cold, always start with cold water when you cook. Because water standing in pipes tends to absorb lead, clear the pipes before drinking by letting your tap run for a minute. Catch the running water and use it to water your plants.