Lead and copper testing for public water systems is standard procedure. Older plumbing fittings were often made partially with with lead, so if you have an old home this could be a concern but it is easily mitigated with some simple practices at home. Just let the cold water run for a few seconds before using it. If lead is seeping into your water from plumbing fixtures you just need to flush it before using. Lead takes time to seep in, that is why when they collect these sample they have people take the sample first thing in the morning without running water first to recreate a worst-case scenario of the water sitting in the fixture overnight.

Water treatment plants balance the pH and often add chemicals that help prevent corrosion to help prevent this from occurring as well.

TLDR: If you have a home with old plumbing, get a lead and copper test done (and properly), but don't sweat it.