Abstract
Trends in microbiological drinking water quality violations in the U.S. indicate that very small and transient non-community water systems bear a disproportionate burden exacerbated by recent regulatory changes.
Highlights
Microbiological drinking water quality violations are the most common violation of the U.S Environmental Protection Agency (EPA) Safe Drinking Water Act and these violations were disproportionately attributed to very small systems and transient non-community water systems
non-community water systems (NCWSs) are further divided into nontransient NCWSs (NTNCWSs), systems that regularly supply water to at least 25 of the same people at least six months per year, and transient NCWSs (TNCWSs), systems that provide water in places where people only stay for short periods of time.[11]
While a rapid decrease in the number of health-based coliform violations was observed once the revised total coliform rule (RTCR) became effective, it remains to be seen if the intended reduction in public health risk will materialize
Summary
Microbiological drinking water quality violations are the most common violation of the U.S EPA Safe Drinking Water Act and these violations were disproportionately attributed to very small systems and transient non-community water systems. Environmental Science: Water Research & Technology measures, such as low-flow faucets and showers,[6] are factors that contribute to poor water quality These factors are not targeted by current regulations under the U.S Safe Drinking Water Act (SDWA), which employs a water treatment-centric approach for producing safe drinking water with a strong emphasis on monitoring contaminants of concern.[7] In contrast, the World Health Organization promotes a risk management framework approach, which is ideally applied from source water to the tap. CWSs provide water to the majority of the U.S population; 94% of the U.S population received at least some of their water from a CWS in 2018.13
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