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Hazards of Lead


Dangers of Lead Poisoning in Ceramic Tile:


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"New lead exposure standards recommended by panel"

By MIKE STOBBE Jan. 5, 2012
SF GATE (AP)

                                                                                        Photo: Chitose Suzuki, Associated Press

ATLANTA - 

For the first time in 20 years, a federal panel is urging the government to lower the threshold for lead poisoning in children.

If adopted, hundreds of thousands more children could be diagnosed with lead poisoning. Too much lead is harmful to developing brains and can mean a lower IQ.

Recent research convinced panel members that children could be harmed from lead levels in their blood that are lower than the current standard, officials at the Centers for Disease Control and Prevention said.

While the number of cases has been falling, health officials think as many as 250,000 children have the problem, many of those undiagnosed. The proposed change could take it to 450,000 cases.

Wednesday's vote by the Advisory Committee on Childhood Lead Poisoning Prevention would lower the definition of lead poisoning for young children from 10 micrograms of lead per deciliter of blood to 5 micrograms. The CDC has accepted all of the panel's recommendations in the past.

Lead - a metal that for years was common in paint and gasoline - can harm a child's brain, kidneys and other organs. High levels in the blood can cause coma, convulsions and death. Lower levels can reduce intelligence, impair hearing and behavior and cause other problems.

Usually, the victims are children living in old homes that are dilapidated or under renovation, who pick up paint chips or dust and put it in their mouths. Lead has been banned in paint since 1978. Children have also picked up lead poisoning from soil contaminated by old leaded gasoline, and from dust tracked in from industrial worksites.

Lead poisoning is detected through a blood test, often when kids are toddlers. Most cases are handled by seeking out and removing the lead source, and monitoring the children to make sure lead levels stay down. A special treatment to remove lead and other heavy metals is used for very high levels.

Quoted from SF GATE, HEALTH 2012. Author Mike Stobbe: http://www.sfgate.com/health/article/New-lead-exposure-standards-recommended-by-panel-2442470.php#photo-1997320





"Lead poisoning toll revised to 1 in 38 young kids"

By MIKE STOBBE Apr. 4, 2013 


NEW YORK (AP) — More than half a million U.S. children are now believed to have lead poisoning, roughly twice the previous high estimate, health officials reported Thursday.

The increase is the result of the government last year lowering the threshold for lead poisoning, so now more children are considered at risk.

Too much lead can harm developing brains and can mean a lower IQ. Lead poisoning used to be a much larger concern in the United States, but has declined significantly as lead was removed from paint and gasoline and other sources.

The new number translates to about 1 in 38 young children. That estimate suggests a need for more testing and preventive measures, some experts said, but budget cuts last year eliminated federal grant funding for such programs.

Those cuts represent "an abandonment of children," said David Rosner, a Columbia University public health historian who writes books about lead poisoning.

"We've been acting like the problem was solved and this was a thing of the past," he added.

Lead can harm a child's brain, kidneys and other organs. High levels in the blood can cause coma, convulsions and death. Lower levels can reduce intelligence, impair hearing and behavior and cause other problems.

Most cases of lead poisoning are handled by tracking and removing the lead source, and monitoring the children to make sure lead levels stay down. A special treatment to remove lead and other heavy metals is used only for extremely high levels.

Often, children who get lead poisoning live in old homes that are dilapidated or under renovation. They pick up paint chips or dust and put it in their mouth. Other sources include soil contaminated by old leaded gasoline, dust from industrial worksites and tainted drinking water

Lead has been banned in household paint since 1978 and was gone from gasoline by the late 1980s.

After lowering the standard, the Centers for Disease Control and Prevention went back and looked at old blood tests from 1,653 children under 6 to determine how many would have lead poisoning under the new definition.

About 3 percent of them — or about 50 kids — had blood lead levels higher than the new threshold of 5 micrograms of lead per deciliter of blood. Using that result, CDC officials calculated that an estimated 535,000 young children have lead poisoning.

A year ago, when the threshold was 10 micrograms, experts estimated that somewhere between 77,000 and 255,000 young kids had high levels of lead.

These estimates have focused on children younger than 6, who have been considered most at risk of neurological problems due to lead.

Overall, the new CDC study found lead counts were higher on average in children who were poor or African-American, said the CDC's Mary Jean Brown, an author of the study.

Those kids are more likely to live in old housing or in neighborhoods with greater exposure to lead, she added.

The good news: Even with the lower threshold, lead poisoning appears to still be declining. Years ago, some local health departments began tracking the number of kids with blood levels at 5 or greater, and they say those numbers have been dropping steadily.

However, it's likely that many children with lead poisoning have not been diagnosed. In the CDC study, elevated lead levels were discovered for a third of the children only when they were tested by researchers.

"When you look for it, you find it," Columbia's Rosner said.

Once lead poisoning is diagnosed, doctors often refer parents to local health departments to get their homes checked out to try to find the source of the problem. But as demand for investigations grows, there's less money to pay for them. Congress last year cut CDC lead program's budget from about $29 million to $2 million. That ended CDC grants to local health departments for their programs.

Detroit's lead program was all but eliminated because of the federal cut and state and local funding problems, said Bob Scott of Michigan's lead poisoning prevention program.

Other places are struggling to keep up with lead work at the same time they are cutting staff. The Cleveland area has been aggressive about lead poisoning prevention but the loss of CDC funding hurt those efforts.

For example, Cuyahoga County — which includes Cleveland — saw its staff for blood testing of children and public education drop from 2 1/2 positions to 1.

"It's unsustainable," said Terry Allan, the county's health commissioner.

Quoted from Associated Press News, 2013. Author Mike Stobbe: http://bigstory.ap.org/article/lead-poisoning-toll-revised-1-38-young-kids




"Studies link childhood lead exposure, violent crime"

By Michael Hawthorne


Exposed to lead

City inspector Paul Diaz talks to a 2-year-old whose blood was found to contain lead at four times the federal standard. Increasingly, researchers are finding lead poisoning at a young age is linked to permanent changes in the human brain that may increase criminality. 

 (Antonio Perez, Chicago Tribune)

After growing up poor in a predominantly African-American neighborhood of Cincinnati, the young adults had reached their early 20s. One by one, they passed through an MRI machine that displayed their brains in sharp, cross-sectioned images.

For those who had been exposed to lead as toddlers, even in small amounts, the scans revealed changes that were subtle, permanent and devastating.

The toxic metal had robbed them of gray matter in the parts of the brain that enable people to pay attention, regulate emotions and control impulses. Lead also had scrambled the production of white matter that transmits signals between different parts of the brain, largely by mimicking calcium, an element that plays a critical role in brain development.

Scars left by lead have had significant consequences for the study participants and their communities. As children, they struggled in school more than those who had not been exposed. As teens, they committed crimes more frequently, University of Cincinnati researchers reported.

"What we found — and continue to find — is that lead sowed the seeds of their future," said Kim Dietrich, a neuropsychologist who has been following the group of nearly 300 people since they were born in the late 1970s. "It isn't conducive to behavior we associate with normal development, making smart decisions and success."

People have known for centuries that lead is poisonous, and removing it from gasoline and paint has dramatically reduced exposure for American children.


     But a growing body of research is making         it clear that the toxic legacy of lead has far       more wide-ranging effects than                         previously known. Lingering dust from          paint and deposits from old vehicle                  emissions continue to harm thousands of       children in older industrial cities like             Cincinnati and Chicago.

Once an obscure academic specialty, lead poisoning is gaining new appreciation from economists, criminologists and education experts as researchers document how early exposure harms children in ways that don't become apparent until years later. The damage ends up costing taxpayers in the form of increased spending on health care, special education and law enforcement.

Last month, a Tribune investigation found that lead hazards are festering in the same parts of Chicago that have given the city a national reputation for violence and academic failure. In impoverished, crime-ridden neighborhoods like Austin, Englewood and Lawndale, more than 80 percent of the children tested in 1995 had dangerous lead levels.

Trends in lead pollution and assault rates in Chicago (chart)
Tribune Graphics

Today those kids are in their early to mid-20s, when criminal behavior peaks.

As evidence mounts of the links between lead poisoning, poor school performance and crime, some scientists are starting to focus on lead pollution as a key factor in Chicago's violence.

"People in neighborhoods like Englewood have faced multiple assaults over different periods of time — job losses, segregation, housing discrimination," said Robert J. Sampson, a Harvard University researcher who has been studying Chicago for more than two decades. "Yet through all of that there is this persistent lead poisoning. It creates a social context where kids are at a clear disadvantage."

Sampson recently added lead data to his existing research on poverty, education and crime in Englewood and other neighborhoods. The results, he said, were shocking. A map of lead poisoning rates among children younger than 6 in 1995, for instance, looks very similar to a map of aggravated assault rates in 2012, when those kids were 17 to 22 years old.

"It's not something I appreciated before," Sampson said. "But when I see the astounding levels of lead poisoning in these communities, it makes complete sense that it is part of the cycle of deprivation."

Politicians and policymakers have yet to catch up to this line of thinking, seemingly regarding lead pollution as a problem solved long ago. During the past five years, federal and state officials have sharply cut funding to screen kids, inspect properties and eliminate lead hazards.

With less money directed at the problem, children ages 5 and younger continue to be harmed at rates up to six times the Chicago average in corners of predominantly African-American neighborhoods on the South and West sides, according to the Tribune's analysis of city records.

One researcher working in Chicago, Anne Evens, recently published a study that draws a sharper focus on how lead is still ravaging the city years after it faded as a local and national issue.

A former chief of lead poisoning prevention at the Chicago Department of Public Health, Evens obtained the lead tests of more than 58,000 children born in the city from 1994 to 1998 and compared the results with how they performed on standardized tests in third grade.

Her peer-reviewed study, published in April in the scientific journal Environmental Health, found that exposure to lead during early childhood significantly increased the chance that a student would fail reading and math tests, even when controlling for other factors such as poverty, race, birth weight and the mother's education level.

The scope of what Evens found is staggering: At three-quarters of Chicago Public Schools, the average lead level of third-graders exceeded a standard established by the Centers for Disease Control and Prevention in each year from 2003 to 2006.

Why is third grade so important? That's when children begin to use reading to learn other subjects, and studies show students who fail to master reading skills during such a critical year are more likely to fall behind in later grades and drop out of high school. Dropouts are significantly more likely to end up in jail than to get a diploma.

Some teachers and reading specialists know that kids exposed to lead as toddlers are more likely to act out, have trouble staying on task and struggle to work well with classmates. Yet it doesn't come up in the debate about how to improve schools.

"I used to think that lead was only a problem years ago for kids who had eaten a bunch of paint chips," said Karl Androes, co-founder of Reading In Motion, a nonprofit that trains CPS teachers to improve reading skills in kindergarten and first grade through music and drama. "That's also why we've had trouble getting the (education) foundations or the principals to pay attention to it."

"But we're talking about our kids now," Androes said. "And there just isn't enough attention being paid to how lead affects the classroom."

Even modest reductions in lead exposure can make a difference.

Jessica Wolpaw Reyes, an economist at Amherst College, studied what happened during the 1990s when Massachusetts embarked on an effort to eliminate lead paint hazards in homes with young children. She found the $5 million-a-year program helped reduce the number of students who performed poorly on standardized tests by 1 to 2 percentage points, with most of the benefits seen among children from low-income communities.

While that might not sound like much of an improvement, Reyes said, it was equivalent to what the state could have expected if it had closed the income gap between poor and middle-income communities by 22 percent.

"There is a lot of research showing if you can intervene early with children, it costs relatively little but makes a huge difference," Reyes said. "Yet that's a hard sell to policymakers. It's tough to get people to spend money on things that aren't going to yield benefits for another 15 or 20 years."

Multiple studies have concluded that steps taken to reduce lead exposure already have saved money, with the value of removing the toxic metal from gasoline estimated in thebillions or trillions of dollars. Some, including Reyes, argue that stopping the constant flow of lead into the environment is a major reason why crime rates dropped sharply nationwide during the 1990s.

In a 2007 paper, Reyes traced how the 1970 Clean Air Act kicked off the decline in the use of leaded gasoline. The rate of decline varied widely among states and tracked almost perfectly with state-by-state drops in violent crime rates about 20 years later.

Similar studies have been conducted by Rick Nevin, a consultant to the U.S. Department of Housing and Urban Development, and Tulane University researcher Howard Mielke, whose earlier work helped lay the foundation for the phaseout of leaded gasoline.

They concluded that steps taken to reduce childhood lead exposure were a major factor — if not the biggest factor — in preventing people from committing violent crimes in their early 20s.

"This is a no-brainer for the public health community, which is very familiar with what lead does to the human brain," said Reyes. "But until recently, police chiefs and the criminology community in general have been very skeptical."

At a recent City Club of Chicago breakfast, a moderator said he was "going on a limb" in asking Chicago police Superintendent Garry McCarthy about the connection between lead exposure and violent crime. Audience members reacted with laughter.

"Yeah, I kind of study this stuff," said McCarthy. "I don't know."

The moderator quickly moved on to another subject. McCarthy declined to comment for this story.

One of the most compelling Chicago-related studies explored the lead-crime connection at the city level. Mielke, along with colleague Sammy Zahran, compared leaded gasoline emissions with aggravated assault rates in Chicago and five other cities and found a good fit in each one.

Both trends look like an upside-down "U." Emissions from leaded gasoline started increasing in the 1950s, peaked in the early '70s and then steadily declined. Aggravated assault rates rose, peaked and fell on a similar curve, only about 20 years later.

As these studies have percolated beyond scientific journals, the biggest dispute appears to be on how much of an impact the decline of lead had on crime rates. Other experts credit changes such as falling unemployment rates, more police on the streets, higher rates of incarceration and a shift away from the use of crack cocaine.

University of Chicago economist Steven Levitt, co-author of the best-seller "Freakonomics," cited the legalization of abortion as a big part of the crime drop. Fewer unwanted babies, he has argued, meant fewer violent young men decades later.

"The vast majority of people still dismiss lead as anything of any consequence," said Bruce Lanphear, a researcher at Simon Fraser University in Vancouver who conducted some of the first research on health effects at low doses. "It's almost impossible to separate out the underlying reasons for these problems, but lead certainly is one of things that triggers urban decay."

The link between childhood lead exposure and violent behavior is well-established, both in animal research and human studies like the one in Cincinnati. Small doses can reduce IQ and essentially cause parts of the brain to short out, in particular the areas responsible for controlling aggression.

Given the scale of lead hazards in Chicago, advocates say political leaders are overlooking a cost-effective way to help improve schools and reduce crime.

"Of all the problems that affect kids in these neighborhoods, lead is the easiest to solve," said Evens, who now heads Elevate Energy, a nonprofit that addresses lead issues while making homes more energy-efficient. "But there just isn't the political will to do something about it."

Chicago Tribune's Jeremy Gorner contributed.

mhawthorne@tribpub.com

Twitter @scribeguy

Quoted from Chicago Tribune, 2015. Author Michael Hawthorne

http://www.chicagotribune.com/news/watchdog/ct-lead-poisoning-science-met-20150605-story.html

Copyright © 2015, Chicago Tribune


Last Week Tonight with John Oliver discusses lead poisoning in children


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"Governor wants to spend $176M   for battery recycle cleanup"







LOS ANGELES (AP) — Gov. Jerry Brown on Wednesday proposed spending $176.6 million to test and clean up thousands of homes that may be contaminated by lead near the defunct Exide Technologies battery recycling plant.

The money, if approved by the Legislature, would vastly expand an ongoing state effort to identify homes, schools, daycare centers and parks that may have elevated levels of the toxic metal within a 1.7-mile radius of the Vernon plant. There are 26 schools and several parks in the region.

"With this funding plan, we're opening a new chapter that will help protect the community and hold Exide responsible," Brown said in a statement issued Wednesday.

The Department of Toxic Substances Control has spent about $7 million, removing some 10,000 tons of lead-contaminated soil from communities a few miles southeast of downtown Los Angeles in a heavily industrial area. The additional funding would permit testing of all 10,000 properties in the area and provide enough money to remove contaminated soil from about 2,500 of them.

"This is clearly the largest cleanup the department has ever undertaken," department Director Barbara Lee said.

Some estimates have put the final cost at up to $400 million, depending on how many properties are found to have elevated lead levels.

Brown is asking the state Legislature to approve loaning the department money from the state's general fund, with the idea of eventually getting it back from Exide and others that are found to be responsible for the pollution.

Quoted from SFGate.com Associated Press. February 2016

http://www.sfgate.com/news/science/article/176M-proposed-for-Vernon-battery-recycler-cleanup-6837257.php


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