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Articles tagged with: public water system

Sampling and analysis under the fourth Unregulated Contaminant Monitoring Rule

Sampling of large (>10,000 users) and randomly selected small Public Water Systems (PWSs) for constituents under the third Unregulated Contaminant Monitoring Rule (UCMR3) was performed in 2013, 2014, and 2015. This sampling included 1,4-dioxane and six perfluorinated compounds (including perfluorooctanoic acid [PFOA] and perfluorooctane sulfonate [PFOS]), which are “emerging contaminants” that are currently a co...

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