Corporate Banner
Satellite Banner
Environmental Analysis
Scientific Community
 
Become a Member | Sign in
Home>News>This Article
  News
Return

U.S. Standards for ‘Safe’ Limits of PFCs in Drinking Water Appear too High for Children

Published: Wednesday, May 08, 2013
Last Updated: Wednesday, May 08, 2013
Bookmark and Share
A new environmental toxicity study has found that exposure limits for perfluorinated compounds (PFCs) found in drinking water appear to be 100 to 1,000 times too high.

PFCs are chemicals widely used in manufactured products such as non-stick cookware, waterproof clothing, and fast-food packaging.

Philippe Grandjean, adjunct professor of environmental health at HSPH, and Esben Budtz-Jørgensen of the University of Copenhagen, concluded that current exposure limits do not adequately protect children and other vulnerable groups against adverse effects on the human immune system. These same researchers showed in 2012 that routine childhood vaccines are less effective in children exposed to PFCs.

The new study, “Immunotoxicity of perfluorinated alkylates: Calculation of benchmark doses based on serum concentrations in children,” was published online April 18, 2013, in the BioMed Central open access journal Environmental Health.

The researchers compared blood concentration levels of PFCs for 431 five-year-olds in a birth cohort to serum antibody concentrations against tetanus and diphtheria toxoids in the same children at age 7. A doubling in PFC exposure was associated with a 50% decrease in the antibody concentration. As a threshold for this effect could not be identified, the researchers calculated a so-called benchmark dose to identify approximate exposure levels that would protect against the effect. The same method is used by EPA and other agencies.

“Most of the research on PFCs is fairly recent. So it’s no surprise that the EPA limits are already outdated. But if they are more 100 times too high, we need to discuss what went wrong and why the limits were so far off,” Grandjean said.

According to the authors, the discrepancy between the current safe levels and the tolerable exposure levels identified in the new study has occurred because PFCs have not been subjected to systematic toxicity testing, as they were ‘grandfathered’ in when the Toxic Substances Control Act (TSCA) was enacted in the U.S. in 1976. Although production of one of the compounds studied, PFOA (or C8), is currently being phased out in the U.S. and production of another (PFOS) has stopped, exposures continue due to the persistence of these compounds in the environment and in consumer products, and their continued production in other countries.


Further Information
Access to this exclusive content is for Technology Networks Premium members only.

Join Technology Networks Premium for free access to:

  • Exclusive articles
  • Presentations from international conferences
  • Over 2,500+ scientific posters on ePosters
  • More than 3,700+ scientific videos on LabTube
  • 35 community eNewsletters


Sign In



Forgotten your details? Click Here
If you are not a member you can join here

*Please note: By logging into TechnologyNetworks.com you agree to accept the use of cookies. To find out more about the cookies we use and how to delete them, see our privacy policy.

Related Content

Pesticide Found in 70 Percent of Massachusetts’ Honey Samples
New Harvard University study says that the pesticide commonly found in honey samples is implicated in Colony Collapse Disorder.
Monday, July 27, 2015
Seasonal CO2 Amplitude is Growing as More is Added to the Atmosphere
Northern Hemisphere terrestrial ecosystems are taking “deeper breaths,” according to a multi-agency study.
Friday, August 09, 2013
Harvard Researchers Warn of Legacy Mercury in the Environment
Without stringent emissions reductions, future increases in ocean mercury levels are likely to be greater than anticipated.
Wednesday, July 10, 2013
Progress in Energy Innovation, Development, and Deployment
As the financial and environmental costs of current-generation energy sources continue to mount, development and implementation of innovative new energy sources have become increasingly important.
Wednesday, May 15, 2013
Scientific News
Determination of Phosphate in Soil Extracts in the Field: A Green Chemistry Enzymatic Method
New method for phosphate determination which can be carried out in the field to obtain results on the spot.
Open-Source Photometric System for Enzymatic Nitrate Quantification
New method proposed for developing a cheaper, more accessible open-source water testing platform capable of performing Nitrate Reductase Nitrate-Nitrogen Analysis.
Toxic Algae is a Threat to Our Water
A report concludes that blooms of toxic cyanobacteria, or blue-green algae, are a poorly monitored and underappreciated risk to recreational and drinking water quality in the U.S., and may increasingly pose a global health threat.
Significant Part of Greenhouse Gas Emissions Comes From River and Sea Organisms
Running streams are key sources of the greenhouse gas carbon dioxide, but why is it so?
Better Estimates of Worldwide Mercury Pollution
New findings show Asia produces twice as much mercury emissions as previously thought.
Real-Time Data for Cancer Therapy
Biochemical sensor implanted at initial biopsy could allow doctors to better monitor and adjust cancer treatments.
New Biosensors for Managing Microbial ‘Workers’
Researchers at Harvard’s Wyss Institute have unveiled new biosensors that enable scientists to more effectively control and 'communicate with' engineered bacteria.
Playing 'Tag' with Pollution lets Scientists See Who's It
Using a climate model that can tag sources of soot from different global regions and can track where it lands on the Tibetan Plateau, researchers have determined which areas around the plateau contribute the most soot — and where.
Pesticide Found in 70 Percent of Massachusetts’ Honey Samples
New Harvard University study says that the pesticide commonly found in honey samples is implicated in Colony Collapse Disorder.
Ocean Acidfication may have a Dramatic Affect on Marine Life
Study finds many species may die out and others may migrate significantly as ocean acidification intensifies.
Scroll Up
Scroll Down
SELECTBIO

Skyscraper Banner
Go to LabTube
Go to eposters
 
Access to the latest scientific news
Exclusive articles
Upload and share your posters on ePosters
Latest presentations and webinars
View a library of 1,800+ scientific and medical posters
2,500+ scientific and medical posters
A library of 2,500+ scientific videos on LabTube
3,700+ scientific videos
Close
Premium CrownJOIN TECHNOLOGY NETWORKS PREMIUM FREE!