By Leila Waid.
Without water, there is no life. It is a human right to have access to safe drinking water, free from harmful chemicals. However, not everyone gets access to the same safe drinking water. The Safe Drinking Water Act (SWDA), signed into law in 1974, helped bridge some of the inequities around drinking water by setting standards regarding water quality.
However, many chemicals are not being enforced by SWDA. Environmental justice advocates worry that certain communities are being harmed more than others by these unregulated chemicals than others. A study published in the Environmental Health Perspectives quantified these socioeconomic disparities regarding four unregulated classes of chemicals: Dioxane, HCFC, 1,1-dichloroethane, and PFAS.
The researchers conducted a national and US-territories analysis to find whether specific communities were more impacted by these harmful chemicals than others. Alarmingly, of the 4,815 public water systems included in the study, dioxane was found in 22% of the samples, HCFC in 5.8%, 1,1-dichloroethane in 4.7%, and PFAS in 4%. The concentration of these chemicals was also not equal throughout the entire country or all populations. Instead, the study found that Hispanic residents were more likely to be exposed to these unregulated chemicals. Public water systems that didn’t have any of the unregulated contaminants had a 13% Hispanic population. Meanwhile, public water systems that did have unregulated contaminants had a 17% Hispanic population. The researchers estimate that “a 1 standard deviation increase in the percentage of Hispanic residents (15.5 percentage points) was associated with a 5 percentage point increase in the likelihood of target contaminant detection.”
The study also found that residents living in urban areas are more likely to have unregulated contaminants in their water, at 71% versus 56%. The study also included public water systems in U.S. territories and Tribal areas and found that they also had disproportionately higher levels of unregulated chemicals.
How will these unequal exposures impact the health of the communities exposed to this contaminated water?
PFAS has become one of the most studied chemicals in the literature due to its status as a forever chemical. New studies are being published rapidly about the health effects of PFAS. For example, researchers are currently studying how PFAS may disrupt circadian rhythms and impact sleep cycles. As for dioxane, the Environmental Protection Agency has classified this chemical as a “likely human carcinogen.” 1,1-DCA also poses health risks, as it can affect the function of the nervous system.
Water is a necessity for all life on earth. And no human being should ever have to worry that the water they are drinking contains harmful chemicals that are not even being regulated at the national level. Thus, we must constantly advocate for regulations that will fully protect our drinking water sources.