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On July 30, 2020, New York’s Public Health and Planning Council voted to establish maximum contaminant levels (MCLs) for PFOA and PFOS, two of the more common per- and polyfluoroalkyl substances known as PFAS. The MCL for both PFOA and PFOS was set at 10 parts per trillion (ppt) and once approved by the state’s Health Commissioner, public water systems serving 10,000 people or more will be required to start testing for these compounds within 60 days of the date the regulations are published in the New York State Register. Systems serving between 3,300 and 9,999 person would have to begin testing within 90 days, while all other systems would need to begin testing within six months. In conjunction with setting the PFAS MCL, New York also set a 1 part per billion MCL for 1,4-dioxane, another emerging contaminant.
The most immediate impact of the new MCLs will be the testing obligation it imposes on drinking water providers. If these contaminants are detected in drinking water above the MCL, the drinking water provider will be required to notify its consumers and develop a plan to address the MCL exceedances. Although New York has historically provided grants to assist municipalities in addressing these types of emerging contaminants, these grants are unlikely to be sufficient in light of the wide-spread testing that will now be required. As such, one can likely expect a substantial increase in litigation as municipalities aggressively look to shift the burden of paying for these remedial measures from ratepayers to manufacturing and/or other industrial operations that may have contributed to the presence of these contaminants in the environment.