Monthly Archives: February 2017

EDF’s assessment of a health-based benchmark for lead in drinking water

By Tom Neltner, Senior Director, Safer Chemicals Initiative / Published: February 28, 2017

Tom Neltner, J.D., is Chemicals Policy Director

Health professionals periodically ask me how they should advise parents who ask about what constitutes a dangerous level of lead in drinking water. They want a number similar to the one developed by the Environmental Protection Agency (EPA) for lead in dust and soil (which is the primary source of elevated blood lead levels in young children). I usually remind them that EPA’s 15 parts per billion (ppb) Lead Action Level is based on the effectiveness of treating water to reduce corrosion and the leaching of lead from plumbing; it has no relation to health. Then I tell them that EPA is working on one and to hold tight. Admittedly, that is not very satisfying to someone who must answer a parent’s questions about the results of water tests today.

On January 12, EPA released a draft report for public comment and external peer review that provides scientific models that the agency may use to develop potential health-based benchmarks for lead in drinking water. In a blog last month, I explained the various approaches and options for benchmarks that ranged from 3 to 56 ppb. In another blog, I described how EPA’s analysis provides insight into the amounts of lead in food, water, air, dust and soil to which infants and toddlers may be exposed. In this blog, I provide our assessment of numbers that health professionals could use to answer a parent’s questions. Because the numbers are only a start, I also suggest how health professionals can use the health-based benchmarks to help parents take action when water tests exceed those levels.

EDF’s read on an appropriate health-based benchmark for individual action on lead in drinking water

When it comes to children’s brain development, EDF is cautious. So we drew from the agency’s estimates calculated by its model to result in a 1% increase in the probability of a child having a blood lead level (BLL) of 3.5 micrograms of lead per deciliter of blood (µg/dL).

EDF’s assessment of a health-based benchmark for individual action on lead in drinking water
Age of child in home and type of exposure Houses built before 1950¹ Houses built 1950 to 1978² Tests show no lead in dust or soil³
Formula-fed infant 3.8 ppb 8.2 ppb 11.3 ppb
Other children 7 years or younger 5.9 ppb 12.9 ppb 27.3 ppb

Read More »

Posted in Drinking water, Emerging science, Lead / Tagged , , , , , | Comments are closed

Dad’s lead-laden hair dye could impact the whole family: FDA to consider barring lead compound in widely-used men’s hair dyes

By Jack Pratt / Published: February 27, 2017

Jack Pratt is Chemicals Campaign Director

Today, EDF joined a group of advocates in filing a petition that could force a ban on lead in hair dyes. Over the last several decades, we have gone to great lengths to reduce lead exposure—from eliminating the use of lead in gasoline, to tackling legacy uses in paint and water pipes. Yet, somewhat incredibly, lead is still permitted in hair dyes in the United States. Unfortunately, the evidence indicates that use can have an impact not only on the men who use it (it is seemingly exclusive to men’s dyes) but can have an impact on kids in the house too. That’s why FDA should take action and reverse their decades-old approval of lead in hair dyes.

Read More »

Posted in FDA, General interest, Health policy, Lead, Regulation / Tagged , | Comments are closed

A Toxic Scavenger Hunt: Finding the First 10 Lautenberg Act Chemicals

By Jack Pratt / Published: February 13, 2017

Jack Pratt is Chemicals Campaign Director

Recently, EPA identified the first 10 chemicals for evaluation under our country’s newly reformed chemical safety law. That motivated me to see how easy it would be to find these chemicals in consumer products. The answer: very easy. In fact, while you’ve probably not heard of many of these chemicals, the products that contain them are likely all too familiar.

Read More »

Posted in General interest, TSCA reform / Comments are closed

No, chemical industry, you can’t have your cake and eat it too (Part 2)

By Richard Denison / Published: February 10, 2017

Richard Denison, Ph.D., is a Lead Senior Scientist.

[Part 1 here]

We have been watching with growing alarm the rapidly unfolding efforts by leadership in Congress and the Trump Administration to gut health and safety protections that provide millions of Americans with clean air, water and safe products.  Support by the American Chemistry Council (ACC) for such efforts, detailed below, gives us profound worry and deep frustration given the trade association’s support of major reforms to the Toxic Substances Control Act last year.

Many of ACC’s member companies worked for many years to move the industry towards strong federal legislation that can restore public and market confidence in the safety of their products.  Many of these companies have also been embracing sustainability commitments, and have acknowledged that a strong federal chemicals management system is critical for charting the path to a safer more sustainable future.  Those companies with a real commitment to safer chemicals and sustainability should be very alarmed that their trade association has endorsed legislation and the Trump Administration’s deregulatory executive order that would profoundly limit EPA’s and the rest of the Federal government’s ability to protect human health and the environment.

These actions by the executive and legislative branches will or would severely constrain EPA from acting to address chemical risks under the Lautenberg Act as well as other federal laws that protect our air, water, land, workplaces, schools and homes.

Here are the specifics:   Read More »

Posted in Health policy, TSCA reform / Tagged , | Comments are closed

No, chemical industry, you can’t have your cake and eat it too (Part 1)

By Richard Denison / Published: February 9, 2017

Richard Denison, Ph.D., is a Lead Senior Scientist.

There is an extreme anti-regulatory and anti-science bandwagon moving fast through Washington, and much of the chemical industry seems to have jumped right on board.  We’re also seeing growing signs of industry pushback against even modest early actions EPA is taking to implement the Lautenberg Act, which reformed the obsolete Toxic Substances Control Act (TSCA) and passed with strong bipartisan support only last June.

[pullquote]Companies have every right to provide their input to EPA and argue the case for their chemicals in accordance with designated processes the agency has established for this purpose.  But resorting to tactics of obstruction and delay won’t fool anyone.  That’s the very thing that brought about the public crisis in confidence surrounding this industry in the first place.[/pullquote]

I’ll address these concerns in this and a second post to follow.  This post will address several attempts by some in the chemical industry to thwart EPA’s efforts to implement the new TSCA.  The second post will look at the industry’s main trade association’s unabashed – indeed, boisterous – support for a new Executive Order and multiple “regulatory reform” bills moving in Congress, which it embraces despite the fact that they would impose on EPA (and other agencies’) rulemakings – including those under the new TSCA – dozens of new knot-tying strictures, some of which the Lautenberg Act just got rid of.

This suggests that some in the industry have a very short memory:  What led the industry to finally support TSCA reform was its recognition that the public, other levels of government and the market itself have little confidence in the safety of its products or the ability of government to protect people and the environment from toxic chemicals.  Any relief it sought from its initial endorsement of a stronger federal chemical safety system will quickly dissipate if industry representatives – emboldened by the current political climate – take actions to stymie implementation of the new law and to buoy executive and legislative vehicles that would bring the regulatory system to a grinding halt.

So, let’s start with a few of the battles that some in the industry are waging to undercut recent EPA actions, authorized under the new TSCA, to restrict three highly toxic chemicals – trichloroethylene (TCE), methylene chloride (MC) and N-methylpyrrolidone (NMP) – the first such actions taken under TSCA in nearly 30 years.  Read More »

Posted in Health policy, TSCA reform / Tagged , , , , | Comments are closed

EPA to consider perchlorate risks from degradation of hypochlorite bleach

By Tom Neltner, Senior Director, Safer Chemicals Initiative / Published: February 3, 2017

Tom Neltner, J.D., is Chemicals Policy Director and Maricel Maffini, Ph.D., Consultant

Virtually all types of food contain measurable amounts of perchlorate. Young children are the most highly exposed, and they consume levels that may be unsafe. Reducing exposure to perchlorate is of public health importance because it presents a risk to children’s brain development

One potentially significant source of the toxic chemical in food is hypochlorite bleach that, when not well managed, degrades to perchlorate. Bleach is used to sanitize food manufacturing equipment or to wash or peel fruits and vegetables. Thanks to a recent decision by Environmental Protection Agency’s (EPA) Office of Pesticide Programs, we will better understand the risk posed by perchlorate-contaminated bleach and whether standards are needed to improve the management of bleach.

Reduce perchlorate exposure by improving bleach management

In 2011, an excellent report by the American Water Works Association (AWWA) and the Water Research Foundation documented that hypochlorite bleach degrades into perchlorate. The report also included guidelines on better management of hypochlorite to preserve its effectiveness for drinking water utilities using it to disinfect water.

Most of AWWA’s recommendations are equally relevant to food manufacturers and anyone using bleach to disinfect food contact surfaces. The key recommendations are:

  • Dilute hypochlorite solutions on delivery. Cutting the concentration in half decreases the degradation rate by a factor of 7.
  • Store hypochlorite solutions at lower temperatures. Reducing temperature by 5oC decreases degradation rate by a factor of 2.
  • Keep pH between 11 and 13 even after dilution.
  • Avoid extended storage times, and use fresh hypochlorite solutions when possible.

The objective is not to reduce the use of bleach. Rather it is to preserve its effectiveness by preventing degradation to perchlorate through careful management.

Bleach: a food additive and a pesticide

Read More »

Posted in Drinking water, Emerging science, FDA, Food, Perchlorate, Regulation / Tagged , , , , , , | Authors: / Comments are closed