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Study: Arsenic In Drinking Water Damages Hearts Of Young Adults

danieltx

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https://www.msn.com/en-us/health/health-news/arsenic-in-drinking-water-damages-hearts-of-young-adults/ar-AAB1dWR?li=BBnbfcL

Young adults free of diabetes and cardiovascular disease developed heart damage after only five years of exposure to low-to-moderate levels of arsenic commonly found in groundwater. This was the finding of a new study published Tuesday in Circulation, a journal published by the American Heart Association.

Long-term exposure to inorganic arsenic, a human poison that occurs naturally in the earth's crust, has been linked to various cancers, kidney damage, hypertension, cardiovascular disease and diabetes. Organic arsenic, such as what's found in seafood, is not known to be toxic to humans.

While arsenic can be found in the air and soil, the World Health Organization says the greatest threat to public health globally comes from groundwater, which is contaminated as it flows through rocks and minerals containing arsenic.

In the United States, people who live in rural and some suburban areas can be exposed to untreated groundwater through the use of private wells.

"People drinking water from private wells...need to be aware that arsenic may increase the risk for cardiovascular disease. Testing those wells is a critical first step to take action and prevent exposure," lead author Dr. Gernot Pichler, a medical specialist at Hospital Hietzing/Heart Center Clinic Floridsdorf in Vienna, Austria, said in a statement.

Arsenic and heart disease

Research has previously shown an association between low-to-moderate levels of arsenic and diabetes, hypertension and cardiovascular problems, but just how this occurs is still unclear.

The new study analyzed data from the Strong Heart Family Study, a longitudinal study looking at cardiovascular risk factors among American Indians who traditionally rely on well water living in Oklahoma, Arizona, North and South Dakota.

Urine samples were gathered from 1,337 adults with an average age of 30.7 years and tested for arsenic levels. The size, shape and functionality of their hearts were also assessed via ultrasound.

None of the participants had diabetes or heart disease at the start of the study.

The researchers found that when arsenic levels in urine doubled, the chance of developing left ventricular hypertrophy, a thickening of the walls of the heart's main pumping chamber, rose to 47%.

As the walls of the heart muscle thicken, the heart must work harder and harder to pump blood throughout the body. According to the American Heart Association, the condition is closely linked with sudden cardiac arrest, stroke and heart failure.

Study participants who had pre-hypertension or existing high blood pressure, had a 58% greater risk for thickening of the walls to occur.

"The stronger association in subjects with elevated blood pressure suggests that individuals with pre-clinical heart disease might be more prone to the toxic effects of arsenic on the heart," Pichler said.

While the study was performed among tribal populations, the study's findings can apply to anyone living in a rural location with low or moderate levels of arsenic in their groundwater, according to Pichler.

Arsenic and groundwater

As one of the "most abundant environmental metals worldwide", arsenic affects "more than 200 million people" in more than 70 countries via drinking water alone, said the University of Cambridge's Rajiv Chowdhury and Kim Daalen in an editorial accompanying the study.

In the United States, the highest levels tend to be found in private wells that tap into the ground in areas contaminated by arsenic.

"The water from public suppliers must meet Environmental Protection Agency standards of less than 10 micrograms of arsenic per liter or 10 parts per billion," said hydrologist Joseph Ayotte, chief of the groundwater quality studies section of the US Geological Survey.

"It's a really small amount but there's evidence concentrations much lower than that can cause human health issues," Ayotte said, adding that several states are looking at lowering their limits to 5 micrograms per liter.

About 44 million people in the US mainland use private well water, according to a 2017 study by the US Geological Survey and Centers for Disease Control and Prevention led by Ayotte. Of those, over two million people are estimated to be drinking from wells that have high concentrations of arsenic.

This map shows the areas of the US which are more likely to have well water with arsenic levels of 10 micrograms or more. However, water in private wells can exceed "1,000 micrograms per liter" in some areas, Ayotte said.

States that may have high-levels of arsenic in groundwater include Washington, Oregon, Nevada, California, Arizona, New Mexico, Maine, Massachusetts, New Hampshire, New Jersey, Maryland, Michigan, Wisconsin, Illinois Ohio, Indiana, Florida, Virginia, North Carolina, South Carolina.

Anyone concerned about the arsenic contamination of their well water should have it tested immediately.

"Start with state, public health and environmental groups in your own state," Ayotte said. "No one solution fits everywhere, so they are the best to advise on what to do."

Some potential solutions include adding a treatment system to the water as it exits the well, drilling a new well in a contamination-free area and relying on bottled water, he said.

More research needed

The new study had several limitations, wrote Chowdhury and Daalen in their editorial, such as the use of urinary tests, which can only measure recent exposure, instead of toenail testing, which can show long-term exposure. In addition, groundwater can contain a number of other environmental metals, such as lead, which are already known to be extremely toxic.

Still, they wrote, "these studies are important since cardiovascular disease remains the single leading cause of adult premature death worldwide and millions of individuals globally are exposed to arsenic and other metal contaminants."
 
I would definitely be concerned if my family lives off of well water. Ive never owned a home that used well water. Does anyone know if there is any kind of testing required by the county you live in? Do most households have a filter system for the water or do they just drink it basically right out of the ground?

There was a restaurant we used to go to that was out in the country and they used well water. The water had a really strong iron taste to it. It is an acquired taste. I really don't mind the taste of well water, had it on other occasions too.
 

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