Involves chemical compounds detected in 2017-2019 for which once-a-year utility averages had been lower than an EWG-selected health guideline established by a federal or state public health authority; chemicals detected underneath the EPA's Unregulated Contaminant Checking Rule (UCMR three) software in 2013 to 2015 (and subsequent screening when available), for https://ca63186.digiblogbox.com/53581562/article-under-review