Evaluating Perchlorate Levels in Groundwater and Their Impact on Nursing Infants
Author Information
Author(s): Ginsberg Gary L., Hattis Dale B., Zoeller R. Thomas, Rice Deborah C.
Primary Institution: Connecticut Department of Public Health
Hypothesis
Does the U.S. EPA's preliminary remediation goal for perchlorate in groundwater protect nursing infants from exposure?
Conclusion
The current EPA guideline for perchlorate in groundwater does not adequately protect nursing infants from excessive exposure.
Supporting Evidence
- The EPA's preliminary remediation goal for perchlorate in groundwater is set at 24.5 μg/L.
- 90% of nursing infants could exceed the reference dose due to increased breast milk concentration.
- Drinking water perchlorate must be below 6.9 μg/L to keep median infant exposure below the reference dose.
Takeaway
Perchlorate in drinking water can be harmful to babies who are breastfed, and the current safety limits might not be safe enough.
Methodology
Monte Carlo analysis was used to simulate nursing infant exposures to perchlorate from breast milk and background levels.
Potential Biases
Potential bias due to reliance on ecologic study designs in previous research.
Limitations
The study relies on existing biomonitoring data, which may not fully capture all exposure routes for infants.
Participant Demographics
The study analyzed data from women aged 15-44 years, representing the general U.S. population.
Digital Object Identifier (DOI)
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