Water systems and biosolids advocates are urging the Trump EPA to revise the modeling, including risk scenarios and human exposure assumptions, underlying the Biden-EPA’s draft risk assessment of two legacy PFAS in biosolids, charging it improperly calculated risks and overstated the harm the chemicals cause. “Overall, projected risks from individual pathways are overestimated as the risk assessment focuses on ‘worst-case scenarios,’” the National Association of Clean Water Agencies (NACWA), which represents publicly owned wastewater and stormwater agencies, says in an...