Since my last installment of How your Home is Making You Sick, the Centers for Disease Control and Prevention (CDC) has released and revised their analysis of certain types of Chinese laminate flooring. The initial release was found to have used an incorrect value for ceiling height, which calculated airborne concentration estimates about “3 times lower than they should have been.”
The increased interest in health concerns over certain types of Chinese laminate flooring was due in part to an exposé by CBS’ 60 Minutes (which aired March 1st, 2015) that investigated California home owners’ claims that certain types of laminate flooring sold by Lumber Liquidators was making them sick. The investigation alleged that the Chinese laminate flooring sold by Lumber Liquidators did not meet California Air Resources Board standards for formaldehyde emissions in wood flooring. Lumber Liquidators questioned the testing methodology and results (Lumber Liquidators; cbcnews.com; August 16th, 2015).
In a May 2015 press release, Lumber Liquidators stated that “Initial results of the indoor air quality testing program for certain laminate flooring customers – conducted by independent, accredited laboratories – indicate that over 97% of customers’ homes were within the protective guidelines established by the World Health Organization for formaldehyde levels in indoor air.” However, sales of the products in question were discontinued; and company has offered air quality test kits for those who have purchased laminate flooring from the company.
Since the 60 Minutes exposé, the US Consumer Product Safety Commission (CSPC) tested samples of Chinese laminate flooring and along with the CDC issued “Laminate Flooring Test Results – Health Issues and Solutions”. The consumer handout states that formaldehyde is found in many home products; and levels typically decrease after 2 years of installation. Recommendations in reducing health risks are also listed (cdc.gov/nceh/laminateflooring/docs/nceh-atsdr_laminate-flooring.pdf).
The February 10th CDC press release initial reported analysis conducted by the Agency for Toxic Substances and Disease Registry (ATSDR) and the Centers for Disease Control and Prevention’s (CDC) National Center for Environmental Health (NCEH) of the CSPC data “…found that formaldehyde levels observed in select laminate wood flooring products could cause short-term irritation for people in general and in some cases exacerbate asthma. The risk of cancer associated with long-term exposure to the observed formaldehyde levels is considered extremely small…” (ATSDR and CDC Analysis Finds Possible Health Effects Associated with Formaldehyde in Select Laminate Flooring; cdc.gov).
However, a correction to the analysis was made several days later indicated that that although “the final results are not yet available,” the estimated conclusions are to be close to these: Exposure to the range of modeled levels of formaldehyde in indoor air could cause increased symptoms and other respiratory issues for people with asthma and COPD; Exposure to the lowest modeled levels of formaldehyde could result in eye, nose, and throat irritation for anyone; and The estimated risk of cancer is 6-30 cases per 100,000 people (increased from the initial “Low risk of cancer” 2-9 cases per 100,000 people). The CDC cautions that these revised results are “very conservative” and “the calculated risk is likely lower than our modeled estimate.”
Even though the results are revised, the CDC states that their recommendations will likely remain the same – “we strongly stress taking steps to reduce exposures, which should alleviate respiratory and eye, nose and throat irritation.”
By Dan Krell
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