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Analytical + Environmental

NPDES Permitting: PFAS Testing & Reporting Requirements

The National Pollutant Discharge Elimination System (NPDES) was added as an amendment to the Clean Water Act in 1972. Although PFAS testing is not yet mandated nationwide through the NPDES program, the U.S. EPA released guidance to the states in late 2022, recommending that state administrators consider adding PFAS in wastewater (and later stormwater and

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Everything You Need to Know About the HON Rule

The Hazardous Organic National Emission Standards for Hazardous Air Pollutants (HON Rule) is a pending, yet critical regulation for chemical manufacturing facilities in the United States. To help navigate its complexities, we sat down with Mariah Peronto, Air Program Manager, to answer some of the most pressing questions about the HON Rule. Read on to

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Our Take on the U.S. EPA’s PFAS Priorities

In recent weeks, the U.S. EPA’s announcement outlining the agency’s priorities has dominated the PFAS news. In this post, we share our take on highlights from the announcement and what they may mean for our clients. U.S. EPA Sets the Stage for 2025-2028 Released on April 28, EPA’s press release is worth reading because the take from online commentators

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States Propose 191 PFAS-Related Bills in First Four Months of 2025

During the first few months of the new U.S. EPA administration, PFAS actions slowed down while current plans and programs underwent a review. That’s not been the case in the states. In the first four months of 2025 alone, legislators proposed 191 PFAS-related bills. In this post, we uncover legislative priorities by examining the focus of

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The View from the Lab: Proposed Changes to PFAS Limits in Drinking Water

If your role has anything at all to do with drinking water, you are no doubt aware that the U.S. EPA announced plans to rescind the individual limits on HFPO-DA (GenX), PFHxS, and PFNA and the Hazard Index limit for HFPO-DA, PFHxS, PFNA, and PFBS under the National Primary Drinking Water Regulations (NPDWR). In addition, they announced

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