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The findings add to a growing body of research suggesting that in many places tap water is not only safe but often more tightly regulated and reliably monitored than bottled alternatives. Other research suggests that bottled water often contains higher concentrations of microplastics than tap water, with potential links to inflammation, hormone disruption and the build-up of particles in human organs. High exposure to certain phthalates and bisphenols has been linked to effects on reproductive health, metabolism and development, although levels found in bottled water are generally low and the long-term risks are still unclear. Danish water technology company Aquaporin estimates that producing a liter of bottled water can require up to two thousand times more energy than supplying a liter of tap water.