Water Contaminants Inhibit Thyroid

Under the Safe Drinking Water Act, the EPA just announced that it is working to develop a national safety standard for regulating the amount of perchlorate and up to 16 toxic chemicals known to cause cancer and other health risks.

This is great news....but don't hold your breath.

This means that they are starting to evaluate the feasibility and affordability of treatment technologies to remove perchlorate and will examine the costs and benefits.  They plan to publish the proposed regulation within 2 years, and leave it open to public comments for a final regulation over 1 year after the initial publish date (So we're talking at least 3 years from now most likely).  It is my guess that after that, public water supplies will have a specific time frame to conform to the new regulation(s); who knows how long that will be.

Perchlorate can be found naturally and is also a product of manufacturing.  They are used within the pyrotechnics industry (such as fireworks), and ammonium perchlorate is a component of rocket fuel.


Perchlorate has significant impact on the thyroid gland by interfering with iodine uptake and impairing normal thyroid function.  It is a known goitrogen, and may even lead to the development of thyroid tumors and hypothyroidism.  It can disrupt the thyroid’s ability to produce hormones needed for normal growth and development.

Just like fluoride, it was so effective in lowering thyroid function that it was used as a medicine to treat hyperthyroidism. There are some cases in the 1960's  that patients receiving potassium perchlorate for hyperthyroidism developed aplastic anemia (a condition where the bone marrow fails to produce new blood cells in sufficient quantity), and 7 patients died. 

A 1957 study showed that perchlorate can pass through the placenta and can affect fetal animals more seriously than adults.  Perchlorate can also contaminate human breast milk.  A 2000 Arizona study found a significant increase in abnormal thyroid hormone levels in infants whose mothers drank perchlorate contaminated water from the Colorado River while pregnant.

The EPA has found perchlorate to be a health risk based on the frequency it occurs in public water systems at high enough levels to create a health concern for 5.2 to 16.6 million people.  Monitoring data shows that over four percent of public water systems have detected perchlorate.

Here is a map from the EPA identifying manufacturers and users of perchlorate across the US:



And here is a map from the EPA showing where they believe perchlorate was released into the water system:



It is thought that any effects of perchlorate on the thyroid gland are fully reversible once exposure stops.  It is unclear of just how much perchlorate can affect unborn babies and infants - but I imagine that this damage could be irreversible, since iodine and healthy thyroid function is critical for young growth and development.


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Not only can perchlorate be found in your public water, but also private water systems and wells.  Luckily, perchlorate can be significantly reduced or even eliminated by using a water filtration system, no matter what the EPA decides.  Who knows what else is lurking in your water besides this deadly toxin?  Usually, the EPA will develop a "safe" amount of a water contaminate.  My opinion is that there is no "safe" amount!  I don't want to drink any rocket fuel, pesticide residue, manufacturing chemicals, lead, aluminum, etc - the list goes on and on.  That's why it's so important to filter your drinking water.  Click below for more information.


Water Filtration Systems

Water Contaminants Inhibit Thyroid Water Contaminants Inhibit Thyroid Reviewed by Sarah on 4:43 PM Rating: 5

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