Raw Data: Lead Poisoning of Kids in Flint

Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.


I wanted to get a read on historical levels of lead poisoning of children in Flint, Michigan, so I put together the chart on the right. There’s no consistent data available for the entire 20-year period, but I think I made fairly reasonable extrapolations from the data available.1 What you see is very steady and impressive progress from 1998 to 2013, with the number of children showing elevated blood lead levels (above 5 micrograms per deciliter) declining from approximately 50 percent to 3.6 percent.

Then Flint stopped using Detroit water and switched to Flint River water, which corroded the scale on their lead pipes and allowed lead to leach into the water. The number of children with elevated lead levels rose to 5.1 percent and then 6.4 percent.

In late 2015, Flint switched back to Detroit water. Preliminary testing suggests that this had a beneficial effect: the number of children with elevated lead levels dropped back to 3.0 percent. However, these numbers are still very tentative, so take them with a grain of salt.

UPDATE: I’ve added a line that shows the percentage of children with lead levels above 10 m/d. I wouldn’t want my kids to have anything above 5 m/d, but 10 is where things really start to get scary.

1Here are my data sources and extrapolations. For early years, only data for children above 10 m/d was available, but later years showed both 10 m/d and 5 m/d, which suggests a rough factor of 6x between the two. Also, some years only show data for Genesee County, but other years show both Genesee and Flint, which suggests that Flint levels are about 1.6x higher than Genesee.

  • 1998-2000: From Michigan Department of Health & Human Services chart here, extrapolated from Michigan —> Flint (factor = 0.87) and 10 m/d —> 5 m/d (factor = 6x)
  • 2001-2004: From 2005 MDHHS report here, page 54, extrapolated from 10 m/d —> 5 m/d
  • 2005-13: From MDHHS data here.
  • 2014: From Hurley Medical center data here, adjusted for Genesee —> Flint (factor = 1.6)
  • 2015: From Hurley Medical center data here, slides 10-11, adjusted for Genesee —> Flint.
  • 2016: From preliminary MDHHS data for post-switch levels here.

Full spreadsheet here.

REAL QUICK, REAL URGENT

Minority rule, corruption, disinformation, attacks on those who dare tell the truth: There is a direct line from what's happening in Russia and Ukraine to what's happening here at home. And that's what MoJo's Monika Bauerlein writes about in "Their Fight Is Our Fight" to unpack the information war we find ourselves in and share a few examples to show why the power of independent, reader-supported journalism is such a threat to authoritarians.

Corrupt leaders the world over can (and will) try to shut down the truth, but when the truth has millions of people on its side, you can't keep it down for good. And there's no more powerful or urgent argument for your support of Mother Jones' journalism right now than that. We need to raise about $450,000 to hit our online fundraising budget in these next few months, so please read more from Monika and pitch in if you can.

payment methods

REAL QUICK, REAL URGENT

Minority rule, corruption, disinformation, attacks on those who dare tell the truth: There is a direct line from what's happening in Russia and Ukraine to what's happening here at home. And that's what MoJo's Monika Bauerlein writes about in "Their Fight Is Our Fight" to unpack the information war we find ourselves in and share a few examples to show why the power of independent, reader-supported journalism is such a threat to authoritarians.

Corrupt leaders the world over can (and will) try to shut down the truth, but when the truth has millions of people on its side, you can't keep it down for good. And there's no more powerful or urgent argument for your support of Mother Jones' journalism right now than that. We need to raise about $450,000 to hit our online fundraising budget in these next few months, so please read more from Monika and pitch in if you can.

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate