Where does lead and copper found in drinking water come from?

Lead and copper can be found naturally in water reservoirs throughout Texas, but at extremely low levels. In fact, levels of lead and copper in reservoirs are so low that they are not a health concern. However, if water is not properly treated to minimize its corrosive tendencies, the water delivered to customers can dissolve lead or copper found in customer-owned plumbing. Prior to 1986, lead was a common component of building plumbing. In 1986, Congress amended the Safe Drinking Water Act (originally adopted in 1974) to prohibit the use of pipes, solder or flux that are not “lead free” in drinking water distribution systems. Lead free is defined as no more than 0.2% lead in flux or solder, and no more than 8% lead in pipes. In 2014, Congress further reduced allowable lead content from 8% to 0.25% in pipes and fittings.

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1. Where does lead and copper found in drinking water come from?
2. How does lead and copper from pipes get into my drinking water?
3. Why is lead and copper testing important?
4. Does my home contain lead and copper?
5. Is there anything I can do to protect myself from high levels of lead or copper dissolved from my own plumbing?
6. How is the water in Southlake tested for lead and copper?
7. How were the sample sites for Southlake testing selected?
8. How can I access the results of lead and copper testing in Southlake?
9. Can I have my home tested for lead and copper?
10. What have Southlake’s lead and copper test results indicated about our water?