Wisconsin Supreme Court Ruling Legitimizes DNR Authority—Why It Matters for Contaminated Site Owners

BY: NICK HILL, LPG

In a recent 5–2 decision, the Wisconsin Supreme Court ruled that the state’s Department of Natural Resources (DNR) can enforce environmental cleanup requirements under the Spills Law without going through a formal rulemaking process. This means the DNR can take enforcement action for a reported release of a hazardous substance(s) —even if pollutant levels or types haven’t been formally defined by regulation.

This decision has important implications for responsible parties, site owners, and municipalities. It legitimizes the DNR’s authority and ability to act quickly, especially in cases involving emerging contaminants like PFAS, where formal standards may not yet exist. Properties previously viewed as low-risk could now face renewed scrutiny based on DNR discretion.

The ruling also signals a broader national trend: agencies are asserting more proactive enforcement authority, especially around emerging contaminants, like PFAS. For site owners, that means liability may arise before formal rules are even in place. It’s a reminder to be prepared—through early site assessment, thoughtful risk planning, and historical insurance reconstruction. In many cases, legacy liability can be offset by uncovering old insurance policies. PolicyFind plays a critical role in helping clients locate and reconstruct historical coverage to meet today’s obligations.

At EnviroForensics, we’re closely monitoring how this change unfolds and what it means for the future of environmental liability, cleanup strategies, and redevelopment planning in Wisconsin and beyond.

EPA Refines PFAS Action Plan Under New Administration: Progress, Promises, and Points of Concern

BY: NICK HILL, LPG

Over the past few weeks, the EPA issued several announcements for refining their PFAS Action Plan based on the current administration’s objectives and regulatory interpretations for addressing per- and polyfluoroalkyl substances (PFAS, or “Forever Chemicals”).  Through these initiatives, the EPA aims to reduce the prevalence of PFAS in the environment and to tackle PFAS at the source by holding responsible parties accountable for PFAS releases.  A summary of the new information is presented below.

Revisiting the 2019 PFAS Action Plan: What’s Changed in 2025

First, on April 28, 2025, the EPA announced updates to February 2019 PFAS Action Plan, initially launched in under Trump’ s first term.  The 2019 PFAS Action Plan outlined both immediate and long-term strategies to better understand and address PFAS.  The new EPA updates are centered on strengthening the Science behind decision-making and response actions, fulfilling statutory obligations, enhancing communication, and building partnerships.  Several key factors include designating an agency lead for addressing PFAS, developing effluent limitations guidelines (ELGs) for PFAS manufacturers and metal finishers, enforcing Clean Water Act and TSCA limitations on PFAS use and release to prevent further contamination, and working with states to assess risks from PFAS contamination and the development of analytical and risk assessment tools.

Drinking Water Regulations: A Step Forward with a Delayed Timeline

Shortly after the April 28th announcement, the EPA released a notice on May 14, 2025, emphasizing its commitments to understand and address PFAS while ensuring regulatory compliance is feasible for drinking water systems that passively receive PFAS.  The agency will maintain the current National Primary Drinking Water Regulations (NPDWR) regulations, initially set in April 2024, and the EPA’s Maximum Contaminant Levels (MCLs) for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS).  Additionally, the EPA will be proposing an extension of the compliance deadline for drinking water systems to meet the PFOA and PFOS MCLs from 2029 until 2031 to allow more time to implement solutions for addressing PFOA and PFOS.  The proposed rule is expected to be issued this fall and finalized in Spring 2026

Industry Accountability: Strengthening Effluent Guidelines and Enforcement

The EPA’s initiatives to address PFAS at the start of the second Trump Administration show promise; however, there are concerns regarding alterations to previously established regulations and deadlines. Maintaining the initial Maximum Contaminant Levels (MCLs) for PFOA and PFOS set in April 2024 ensures consistency. Furthermore, the EPA’s plan to establish effluent limitations guidelines (ELGs) for PFAS manufacturers and metal finishers, and to assess other required ELGs to mitigate PFAS discharges, is a positive step towards holding responsible parties accountable for PFAS releases. Additionally, the EPA’s extension of the deadline for drinking water systems to comply with the MCLs for PFOA and PFOS, coupled with the enhancement of outreach and support mechanisms such as the existing Water Technical Assistance (WaterTA) and the new PFAS Outreach Initiative (PFAS OUT), will provide the necessary tools and financial aid to communities and drinking water systems affected by PFAS pollution.

Regulatory Setbacks and Scientific Integrity: Concerns About GenX and PFBS Reversals

Of concern is the postponement of the drinking water system compliance deadline and the EPA’s decision to rescind regulatory actions for GenX chemicals and PFBS based on legal grounds rather than scientific reasons. As scientists, we acknowledge the complexities involved in understanding PFAS and addressing related exposure pathways; thus, additional information can be advantageous in developing long-term effective solutions. However, delaying PFAS treatment in drinking water systems and reversing prior decisions on GenX chemicals and PFBS without scientific justification could unnecessarily extend immediate exposures to communities currently impacted by PFAS contamination. Additionally, while the EPA has expressed intentions to hold Responsible Parties accountable for PFAS releases, the framework for doing so remains ambiguous. We anticipate future decisions and actions from the EPA concerning PFAS with great interest.

Looking Ahead: Anticipated EPA Actions and the Path to PFAS Accountability

For information about the PFAS Rule, visit Final PFAS National Primary Drinking Water Regulation and Per- and Polyfluoroalkyl Substances (PFAS) NPDWR Implementation. For more information about PFAS Technical Assistance, visit EPA Water Technical Assistance. You can also Request EPA WaterTA services for your community.  And if you have more questions, please contact us.

Stephanie Deckard Joins EnviroForensics as Our New Director of Regulatory Compliance

EnviroForensics is proud to announce that Stephanie Deckard has joined our team as Director of Regulatory Compliance. Stephanie brings over 20 years of experience in the environmental consulting field. She will lead a team with broad experience in industrial and municipal compliance, permitting, and obtaining entitlements when converting previously contaminated properties into housing and mixed-use development projects.

EnviroForensics’ CEO Steve Henshaw says, “Stephanie has an excellent understanding of the needs and priorities of our industrial and municipal clients and sees and anticipates their issues before they become problems.”

Federal Government takes further steps toward regulating PFAS, Forever Chemicals

IF FINALIZED, IT WILL SET LEGALLY ENFORCEABLE COMPLIANCE STANDARDS FOR DRINKING WATER 

BY: NICK HILL, LPG

On March 14, 2023, it was announced that the Biden-Harris Administration will be proposing the first-ever national standards for six (6) per- and polyfluoroalkyl substances (PFAS) or “forever chemicals”. In addition, the U.S. Environmental Protection Agency (EPA) Office of Enforcement and Compliance (OECA) held its first of two public listening sessions to obtain general comments about their proposed plans for enforcement of PFAS under the Comprehensive Environmental Response Compensation and Liability Act (CERCLA) and the financial obligations for responsible parties of PFAS contamination to further their development of a CERCLA PFAS enforcement discretion policy. Both actions build on President Biden’s PFAS pollution action plan and the EPA’s PFAS Strategic Roadmap, which were started over two years ago with the objectives of controlling and addressing PFAS pollution and holding PFAS polluters accountable to safeguarding public health, and advancing environmental justice.  

If finalized, the Biden-Harris Administration proposal would regulate two (2) compounds, PFOA and PFOS, as individual contaminants with an enforceable level, or maximum contaminant level (MCL), of 4 part per trillion (ppt). Additionally, four (4) other PFAS (PFNA, PFHxS, PFBS, and GenX Chemicals) would be regulated as a mixture. Their combined levels in water systems would be evaluated via a hazard index calculation to determine the potential risk. Furthermore, if this new drinking water regulation is finalized, public water systems would be required to monitor these chemicals, inform the public if PFAS levels in the drinking water exceed the new standard, and take action to reduce the PFAS levels. The EPA is now seeking input on this proposal by holding a public listening session on May 4, 2023, and accepting written comments before making a final ruling. The pre-publication version of this proposal is linked here 

In another step, the EPA OECA held a public listening session that centered on the financial obligations of responsible parties as part of developing a CERCLA PFAS enforcement discretion policy. During this session, the EPA stated its intent to focus enforcement actions toward the PFAS manufacturing/discharging entities and suggested that it is considering allowing for exemptions to specific entities that “passively” receive or secondarily use materials that may potentially contain PFAS contamination. The list of potentially exempted entities currently consists of solid waste landfills, public water sources and public owned treatment works (POTW), farmers who apply biosolids, and fire departments and airports of municipal, state, and tribal sectors. While many commenters expressed appreciation of the EPA’s progress and consideration of exemptions, others found the EPAs plans to be unclear, specifically regarding the potential effects on stormwater permits, how municipal water suppliers will manage and fund PFAS treatment, and the potential for third party liability against the exempted services. The topic’s next EPA listening session will be held virtually on March 23, 2023.  Recordings for both listening sessions will be available via the EPA website here after the March 23, 2023 session.  

While these two proposals present progress, additional questions arise on the future of PFAS regulation implementation and the potential financial obligations and risks to municipalities and other sectors. For instance, we do not have a clear understanding of who will be held responsible for funding the cleanup of PFAS contamination via the aqueous film forming foam (AFFF), a.k.a. firefighting foam, releases at many airports and fire departments, since the EPA is proposing to exempt these entities. Based on the U.S. EPA’s prior comments, it is possible they would hold the manufacturer responsible for some costs, but the lines of evidence to demonstrate responsibility have yet to be defined, and there is a risk that municipalities and airports have not retained appropriate purchase records if needed. Additional potential risks include the responsibility of known exposures. Though the U.S. EPA is proposing some exclusion to responsibility for the cleanup of PFAS releases, the management of known and continued releases, such as POTW discharges, will likely require long-term mitigation and management.  

Despite these unknowns, some relief can be felt as funding addresses emerging contaminants like PFAS through the recent passing of President Biden’s Bipartisan Infrastructure Law. This law allows the distribution of $10 billion over the next five years to help make drinking water safe in affected communities.

Those who used or interacted with PFAS during their business operations can face a variety of environmental exposures due to PFAS. Those insured should look into their historical commercial general liability (CGL) policies that may aid them in paying for the investigation, remediation, and legal defense of PFAS claims.

As the regulations for these emerging contaminants develop, we will continue to keep our eye on the factors that may affect our clients.  

*In Indiana and New Mexico, policies issued after this time period can also respond to environmental claims. Contact us to learn more.