On July 12, 2021 the EPA published a draft list of current drinking water contaminants that may occur in public water systems and are not currently regulated. The Draft Contaminant Candidate list 5 (CCL 5) includes three chemical groups: per- and polyfluoroalkyls substances (PFAS), cyanotoxins, and disinfection byproducts (DBPs). The EPA began addressing the specific chemicals PFOA and PFOS earlier this year and has now expanded to include PFAS as a group.
CCL 5 was developed under an improved process that included new approaches to rapidly screen a significantly larger number of contaminants, prioritizing data most relevant to drinking water exposure and the potential for the greatest public health concern, and better consideration for sensitive populations and children. EPA continues to collect data and to encourage further research on the listed contaminants to better understand potential health effects from drinking water exposure before making any regulatory determinations.
ESS is a provider of ambient air and stack testing, utilizing the most current methodologies for sampling PFAS, Dioxin/Furans, and many other known carcinogens.
The U.S. EPA signed an amendment to the rule on February 28, 2022 that removes the stay of the formaldehyde limit for lean premix and diffusion flame gas-fired units that were constructed or reconstructed after January 14, 2003.