Well, "Tip Of The Iceberg to ya"
REFERENCE CITATION. MULTIPLE LINKS
That "Go Down The Rabbit Hole" Starting With

1: Thousands of U.S. areas with lead poisoning beyond Flint, MI. https://www.minds.com/newsfeed/1053504442752512000

urn An Old Smartphone Into A Lead Detection Tool For Water Testing
With Cost Effective How To Resources "Open Source" Paper

At This Posting In The "Public" Minds
"Toxic Water Information" Group: https://www.minds.com/newsfeed/1062624352107122688

The Return On Investment for "Lead Remediation" {A1, A2, A3,} could also be figured for alternative Lead Exposure Treatment {1, 2, 3, 4, *6*, *.* Editing & Updating with some tools {3 , 4, 5} and social networks {A4, 1G} to help. https://www.minds.com/newsfeed/1053506766022246400

"Oh No Mr. Bill"
This Thread Might Explain Some Of The
"People Behaving Badly"

1K:
National Report on Human Exposure to Environmental Chemicals
Center For Disease Control CDC update Apr 14, 2017
https://www.cdc.gov/exposurereport/index.html