Date: April 7, 2026
Time: 11:30am ET
With three full years of UCMR 5 data now available from more than 10,000 public water systems, the data offers an unprecedented look into national occurrence trends for PFAS, and lithium. These results provide early indicators of how EPA may expand Health Advisories, adjust Maximum Contaminant Levels (MCLs), and shape the next Unregulated Contaminant Monitoring Rule cycle (UCMR 6).
This webinar will explore key findings in UCMR 5 results—including the frequency and magnitude of detections above EPA MCLs and Health Reference Levels—along with what these patterns signal for EPA’s future regulatory actions. Participants will also learn how UCMR 5 data can be leveraged to meet the Initial Monitoring requirements of the PFAS National Primary Drinking Water Regulation (NPDWR). Plus, we will discuss the potential framework for UCMR 6 based on contaminant occurrence, analytical readiness, and policy trajectory.
Additionally, this session will address the latest developments surrounding the US EPA proposal to set an MCL for Perchlorate, including Initial Monitoring requirements, ongoing compliance, and implications for municipalities.
The most significant trends from three full years of UCMR 5 data across more than 10,000 public water systems
Where PFAS and lithium are exceeding EPA Health Reference Levels—and what that means for water system planning and risk communication
How UCMR 5 results can be used to streamline Initial Monitoring compliance under the PFAS NPDWR
EPA’s likely priorities for UCMR 6 based on occurrence patterns, toxicological research, and regulatory momentum
What perchlorate’s regulatory history—and recent EPA actions—mean for future federal and state oversight
How utilities can prepare for potential renewed regulatory attention
