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Study Calls Lead Paint a Global Threat

Thursday, August 27, 2009

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Although lead in paint has been restricted in the United States since 1978, enough is being produced worldwide to pose a global threat and warrant a global ban, researchers say.

In major countries from three continents, companies continue to sell consumer paints that contain dangerous levels of lead and there is still widespread failure to acknowledge its danger, University of Cincinnati (UC) environmental health researchers say
 
With the majority of American consumer goods being produced overseas, lead paint exposure remains a serious global health threat, the researchers reported Aug. 4 in the Journal Environmental Research online.
 
In the study, Scott Clark, PhD, and his team found that about 73 percent of consumer paint brands tested from 12 countries representing  46 percent of the world’s population exceeded current U.S. standard of 600 parts per million (ppm) for lead in paint. In addition, 69 percent of the brands had at least one sample exceeding 10,000 ppm.

“A global ban on lead-based paint is drastically needed to protect the more than three billion people who may be exposed in the countries allowing distribution of lead-containing paints, as well as Americans unintentionally exposed through consumer products exported to the United States,” says Clark, a professor of environmental health at UC and principal investigator of the study.   
 
The report coincides with the U.S. Consumer Product Safety Commission’s enforcement of heightened restrictions on lead in American consumer paints. The new standard, which took effect Aug. 9, lowers the allowable lead limit from 600 parts per million (ppm) to 90 ppm.
 
“This revised standard for lead in consumer paint is grossly overdue,” adds Clark. “The previous limit of 600 ppm for lead in new paint was established more than 30 years ago when the blood-lead level of concern was much higher than at present. Modern research has shown that children are affected at very low exposure levels and that there is no safe level of exposure.”
 
For the current study, Clark analyzed a total of 373 new household enamel paint samples of various colors and brands from 12 countries in Africa, Asia and South America—with a minimum of 10 samples from most countries included in analysis. His goal was to determine the amount of lead and how it compares to U.S. standards. His team also analyzed the consumer cost of leaded and unleaded paint.

Each paint sample was applied in a single layer to a wood block, left to dry and then removed and analyzed in UC laboratories for lead content. Researchers determined that 73 percent of the paint companies’ products tested had lead concentrations exceeding current U.S. standards.

In September 2006, Clark’s team published what is believed to be the first scientific report to show that unregulated Asian countries produced and sold new consumer paints that greatly exceeded U.S. lead safety levels. In that study, 75 percent of the consumer paint samples tested from countries without controls— including India, Malaysia and China—had levels exceeding U.S. regulations. 

Consumer prices for leaded and unleaded paint were about the same, Clark said.

Their research showed that one multinational company produced low-lead paint in each of the countries where it was sampled; another company was found to have stopped using lead in paints in one country during the course of the study.

“These two observations document the fact that the technology is available so that manufacturers do not need to use lead to produce high-quality paint,” adds Clark. “There is no legitimate reason paint manufacturers—particularly the large, multinational companies we analyzed with more depth in the current study—should knowingly distribute a product that has long been known to be dangerous to people.” 

Clark says calls for a global ban on the use of lead in paints—such as the one made in his 2006 paper—appear to be having some impact. In May of 2009, a United Nations-sponsored international forum passed a resolution to establish a global partnership to achieve such a goal.

This research was funded by the UC’s environmental health department and division of occupational health and hygiene, with partial support from the NITON Division of ThermoFisher Corporation for a portion of the travel within China.

Collaborators in this study include Sandy Roda, Bill Menrath and Paul Succop of UC, Krishna Rampal, MD, of the University Kebangsaan Malaysia, Venkatesh Thuppil, PhD, of the National Referral Center for Lead Poisoning Prevention in India, and Chin Chen of the Occupational Safety and Health Center at Singapore Polytechnic.

   

Tagged categories: Lead

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