In Connecticut, a condo had lead in its drinking water at levels more than double what the federal government deems acceptable. At a church in North Carolina, the water was contaminated with extremely high levels of potentially toxic PFAS chemicals (a group of compounds found in hundreds of household products). The water flowing into a Texas home had both – and concerning amounts of arsenic too.
All three were among locations that had water tested as part of a nine-month investigation by Consumer Reports (CR) and the Guardian into the US’s drinking water.
Since the passage of the Clean Water Act in 1972, access to safe water for all Americans has been a US government goal. Yet millions of people continue to face serious water quality problems because of contamination, deteriorating infrastructure, and inadequate treatment at water plants.
CR and the Guardian selected 120 people from around the US, out of a pool of more than 6,000 volunteers, to test for arsenic, lead, PFAS (per- and polyfluoroalkyl substances), and other contaminants. The samples came from water systems that together service more than 19 million people.
Almost every sample tested had measurable levels of PFAS, a group of compounds found in hundreds of household products. These chemicals are linked to learning delays in children, cancer, and other health problems. More than 35% exceeded a safety threshold that CR scientists and other health experts believe should be the maximum.
Yet many consumers have never heard of PFAS.
In response to the findings, Environmental Protection Agency spokesperson Andrea Drinkard says that 93% of the population supplied by community water systems gets water that meets “all health-based standards all of the time” and that the agency has set standards for more than 90 contaminants. That includes arsenic and lead but does not include PFAS.
America’s water crisis, while widespread, affects some communities more than others, according to an analysis of more than 140,000 public water systems published by the Guardian in February. It found that access to clean drinking water is highly unequal in the US, with water systems that service poorer and rural counties far more likely to have violations than those that provide water to wealthier or urban ones. Water systems in counties with large Latino populations were particularly likely to have violations, the Guardian found.
Investigation into the health effects of PFAS exposure is ongoing, but some of the strongest evidence about their potential risks comes from research of about 69,000 people in and around Parkersburg, W Va. The research – part of a settlement between DuPont, which makes some PFAS, and residents of the community – was depicted in the 2019 movie Dark Waters.
It found a “probable link” between exposure to a type of PFAS and six health problems: high cholesterol, ulcerative colitis, thyroid disease, pregnancy-induced hypertension, and testicular and kidney cancers. Research has also linked some PFAS to learning delays in children.
At least 2,337 communities in 49 states have drinking water known to be contaminated with PFAS, according to a January analysis by the Environmental Working Group (EWG), an advocacy organization.
Despite mounting evidence of widespread contamination and health risks, the EPA has still not set an enforceable legal limit for PFAS in drinking water. Instead, it has established only voluntary limits, which apply to just two of the better-studied forever chemicals – PFOA, or perfluorooctanoic acid, and PFOS, or perfluorooctanesulfonic acid – at 70 parts per trillion combined.
Almost every sample CR tested had measurable levels of arsenic, including 10 – or about 8% – with levels between 3 and 10 ppb. Previous tests from CR and others have shown elevated levels in juices and baby foods.
Research suggests that exposure to even low levels of arsenic can pose health risks over the long term. A 2014 study in the journal Environmental Health found an association between water with arsenic of 5 ppb or greater and a five- to six-point IQ reduction in children.
Source: Guardian