Maximum Contaminant Levels’ Monitoring requirements’ notification requirements

Rule Related to Maximum Contaminant Levels for PFOA, PFOS, 1,4-Dioxane


In 2018, the New York State Drinking Water Quality Council recommended adopting maximum contaminant levels (MCLs) for PFOA, PFOS, as well as the nation’s first MCL for 1,4-dioxane to the Department of Health. The recommended MCLs were: 10 parts per trillion (ppt) for PFOA, 10 ppt for PFOS, and an MCL of 1 part per billion (ppb) for 1,4-dioxane. After facing rulemaking delays caused by the Covid-19 pandemic, the MCLs were adopted in August 2020 by the Public Health and Planning Council. Public water systems must monitor for contaminants, notify health departments and the public of confirmed exceedances, and develop a plan and timeline to bring water systems into compliance. For more information on New York’s efforts to address PFAS contamination, view this informational report provided by the NY Department of Environmental Conservation. 

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