Tag Archives: mercury

Update: Mercury on the Mind

Industrial refinery at sunset with a yellow danger sign warning of mercury area and hazardous chemicals

Mercury is a potent neurotoxin. It is particularly dangerous for pregnant women and young children. As a 2018 TBI on the Hill piece noted, mercury exposure “may delay developmental milestones” in fetuses and children, and acute poisoning can bring tremors, slurred speech, and hallucinations.

The EPA finalized the 2012 Mercury and Air Toxics Standards, targeting coal- and oil-fired power plants. In 2024, these standards were tightened by Congress. Supporters of this heightening of standards argued that the tighter limits reduced toxic exposures tied to neurological harm. Critics countered that by 2021 mercury emissions were already down 90% from pre-2012 levels, and the 2024 update’s compliance costs outweighed its measurable benefits.

In February 2026, the EPA repealed the 2024 update, reverting to 2012 standards. In turn, on April 27, 2026, Senator Whitehouse (RI) introduced S.J.188 to reinstate 2024 standards, which would nullify the presidential proclamation from earlier this year. When the Act went to the Senate floor on June 3, 2026, the resolution failed 46-53, with voting falling in party lines, as they considered (1) Did the 2024 rule cause unnecessary economic stress on the industry, costs that are then passed on to the consumer”, and/or (2) Are the brain-protective regulations too great for the government to ignore?

Mercury on the Mind – 2

Following the posting of my last article, I found additional interesting information about mercury and dentistry (dentistry may not be the primary use of mercury, but it is the most visible one).  Although mercury is no longer toxic once it is absorbed into a compound in a dental filling, laws regarding the use, particularly the dental use, of mercury exist.  For example, in New York, the environmental conservation law was amended in 2002 to state, “no dentist shall use or possess elemental mercury in the practice of dentistry unless such elemental mercury is contained in appropriate pre-encapsulated capsules.”

As it relates to a medical procedure that many brain injury survivors undergo, this summer the journal Radiology published an article: High-Strength MRI May Release Mercury from Amalgam Dental Fillings.  Further study of the possible effects of MRIs and mercury, show that while MRIs on someone who has mercury in their body may not cause or cause harm to a brain injury per se, NIH studies, “provide further support for the noxious effect of MRI (exposure to strong magnetic field) and release of mercury from dental amalgam fillings.”  (Additionally, MRIs can harm implants, such as brain stimulators, which may contain mercury.)

(In relation to the use of the ten chemicals of health public concern, particularly as it relates to dentistry, I would also advice people to be wary of fluoride.  The World Health Organization warns of both inadequate or excess fluoride intake.  Just like mercury, fluoride can help teeth at certain levels, but overexposure can lead to such things as tooth decay and skeletal fluorosis.  Smile! New water fluoridation level called for by government read the title of a CNBC article related to the 2015 federal increase in the amount of fluoride allowed in drinking water.  In fact, all articles I found related to this increase were positive.)