A new study published in the journal Environmental Research Letters examines the links between drinking water quality violations and social vulnerability in the United States, revealing that these violations disproportionately affect the most vulnerable communities. Approximately 70% of the population affected ranked in the highest social vulnerability category, with many different social parameters, beyond income, linked to different drinking water quality violations.
, followed by naturally occurring contaminants and human-caused contaminants such as nitrates.
In assessing which communities and groups are most affected by water violations, previous research has been limited bythat are based on state and administrative boundaries that hide the cross border nature of water distribution, and by federal environmental justice assessment tools that have focused primarily on household income as an indicator of social vulnerability, potentially neglecting key, data-available aspects of vulnerability.
This study instead looked at data based on community water systems across the whole country in relation to an improved measure of social vulnerability, the mSVI, developed from a tool from the Center for Disease Control, and informed by more recent literature and data analytics. Proposed federal drinking water infrastructure funding requires individual states to allocate over 49% of the funding to disadvantaged communities . However, states have substantial discretion in defining DACs, resulting in large variations in definitions across the US.
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