Cumulative Risk Assessment

New York Assembly Amends PFAS Drinking Water MCL Proposal (A08634B)

In May 2026, New York lawmakers advanced amended Assembly Bill A08634B, proposing strict statutory PFAS maximum contaminant levels in public drinking water together with firm reporting and compliance dates. If enacted, public water systems will need to plan treatment and monitoring upgrades to meet thresholds as low as 4 parts per trillion by 2029, signalling tighter state PFAS policy and significant infrastructure investment needs.

15 May 2026, 15:41assembly.state.ny.usUnited States

Scientific Review Finds PFAS Increase Toxicity of Chemical Mixtures in Aquatic Organisms

A 2026 peer-reviewed review in the journal Toxics finds that PFAS can significantly alter the toxicity of co-occurring pesticides, microplastics and metals in aquatic organisms, often producing synergistic effects on oxidative stress, development, reproduction and immune function. For regulators and companies, this evidence reinforces pressure to treat PFAS as a class, assess cumulative mixture risks rather than single-chemical exposures, and anticipate tighter controls on PFAS uses that contribute to aquatic contamination and biodiversity loss.

14 May 2026, 12:27mdpi.comGlobalUnited States

Wisconsin Village of Tony Issues PFAS Drinking Water Advisories as State Finalises PFAS Standards

A local report describes how the Village of Tony in Wisconsin is continuing PFAS sampling, flushing and public advisories after its small public water system recorded a PFOA detection and a PFAS hazard index above state health guidance while Wisconsin finalises PFAS drinking water standards aligned with EPA rules. The case highlights the risk that even small rural systems may need to invest in new wells or treatment and tap into emerging PFAS funding as stricter federal and state standards turn mixture-based PFAS findings into actionable compliance and infrastructure decisions.

4 May 2026, 18:25ladysmithnews.comUnited States

EFSA Issues Tender For Strategies For Grouping Chemicals

EFSA has launched a €400,000 EU tender (EFSA/2026/OP/0004) to develop harmonised strategies for grouping chemicals and more automated data handling to strengthen assessment of health risks from combined exposure. While it creates no immediate obligations, the project signals how EFSA’s future mixture risk assessment methods and data expectations may evolve for chemicals and food and feed operators.

4 May 2026, 09:20ec.europa.euEuropean Union

Global Review Finds TSCA, REACH, and CEPA Undervalue Risks From Chemical Mixtures

An April 2026 peer-reviewed review and NGO analysis highlight that major chemical safety laws such as TSCA, REACH and CEPA still evaluate PFAS, heavy metals, pesticides and other toxicants largely substance-by-substance, underestimating cumulative risks from real-world mixtures. For regulatory, product stewardship and EHS teams, this strengthens the case for anticipating stricter cumulative and class-based risk assessment requirements—especially for PFAS and pesticide mixtures—and for prioritising precautionary, alternatives-based strategies rather than relying solely on refined single-chemical risk calculations.

3 May 2026, 07:23pubs.acs.orgGlobalUnited StatesEuropean UnionCanada

EU PANORAMIX Study Reveals Combined Risks From Real-Life Chemical Mixtures

An EU-funded PANORAMIX study coordinated by DTU shows that real-life mixtures of man-made chemicals in blood, breast milk and other matrices can drive combined reproductive and developmental effects even when individual substances occur at levels deemed safe. These findings strengthen the case for EU regulators to incorporate mixture effects, effect-based bioassays and environment–food–human continuum profiling into chemicals legislation and risk assessment, signalling tighter scrutiny of PFAS, bisphenol A, phthalates and other persistent contaminants.

28 Apr 2026, 11:50food.dtu.dkEuropean UnionDenmark

Minnesota Senate Introduces SF 5109 To Require Health Impact Assessments For Certain Projects

Minnesota lawmakers have introduced Senate File 5109 to require formal health impact assessments for certain major projects as part of the state’s environmental review process from 2028. If enacted, this would add a new health-focused layer to permitting, with independent assessments, stronger public and Tribal engagement, and additional cost and timeline implications for large infrastructure and industrial proposals.

16 Apr 2026, 13:51revisor.mn.govUnited States

New York Senate Passes PFAS Drinking-Water MCL Bill S3207A and Sends It to Assembly Health Committee

In March 2026 the New York Senate passed Bill S3207A, which would set very low drinking-water limits and a hazard index for several PFAS and sent it to the Assembly Health Committee. If enacted, the bill would force New York public water systems and PFAS dischargers to prepare for stringent treatment, monitoring, and potential liability ahead of a 2029 compliance deadline.

15 Apr 2026, 13:48nysenate.govUnited States

EU SCHEER 13th Plenary Minutes Highlight Chemical Mixtures, Copper EQS and Emerging Risks

SCHEER’s 13th plenary minutes from March 2026 outline progress on opinions and working-group mandates covering chemical mixtures, copper water-quality standards, emerging risks, and brain stimulator safety. These scientific signals foreshadow future EU changes to how combined chemical exposures and copper in water are assessed, so compliance teams should monitor subsequent SCHEER/EFSA outputs and legislative follow-up rather than take immediate action.

14 Apr 2026, 14:28ec.europa.euEuropean Union

Canada PMRA Publishes Project Plan for Cumulative Health Risk Assessment of Organophosphate Pesticides (REV2026-01)

Health Canada has launched a multi-year cumulative risk assessment for 29 organophosphate pesticides with a proposed decision targeted for early 2030. This comprehensive evaluation signals a shift toward stricter aggregate exposure standards that may lead to significant use restrictions or lowered residue limits for food imports.

5 Apr 2026, 06:14canada.caCanada

Global Public Health Experts Issue Seattle Statement Urging Stricter Glyphosate Regulation

Global health experts have issued the Seattle Statement calling for the phase-out or stricter regulation of glyphosate due to systemic health risks. This consensus intensifies pressure on regulators to overhaul pesticide risk assessments and signals significant long-term litigation and market access risks for glyphosate-based products.

3 Apr 2026, 18:34deohs.washington.eduGlobalUnited States

Minnesota Legislature Proposes Health Impact Assessment Requirements in Environmental Review

Minnesota has introduced legislation to mandate Health Impact Assessments for major industrial and infrastructure projects starting in 2028. This proposal increases permitting complexity and financial risk by requiring project proposers to fund independent health evaluations and community impact studies.

26 Mar 2026, 19:15revisor.mn.govUnited States

EFSA Publishes 2025 Annual Report of the Advisory Group on Biomarkers of Effect

EFSA published its 2025 annual report on biomarkers of effect in March 2026, advancing methodological frameworks for chemical risk assessment. These developments signal a shift toward more sophisticated, effect-based monitoring that will likely influence future safety thresholds and cumulative risk evaluations.

26 Mar 2026, 18:58open.efsa.europa.euEuropean Union

Netherlands (RIVM) Highlights PFAS Drinking Water Guideline Versus Legal Limit

The Netherlands is moving to codify a strict 4.4 ng/L PFAS drinking water guideline into law, significantly lowering the current legal limit. This regulatory shift signals a move toward more aggressive upstream source controls and heightened liability risks for industrial PFAS emitters.

26 Mar 2026, 11:59rivm.nlNetherlandsEuropean Union

EU SCCS Methodologies Working Group Minutes Highlight Aggregate Exposure and Notes of Guidance Revision

The SCCS is advancing a harmonised aggregate exposure framework and the 13th revision of its Notes of Guidance for cosmetic safety assessments. Manufacturers should prepare for more rigorous exposure modeling requirements and updated toxicological protocols that will redefine safety dossier standards for consumer products.

17 Mar 2026, 20:30health.ec.europa.euEuropean Union

Netherlands RIVM Updates Children's Exposure to Isothiazolinones and Parabens

The Dutch RIVM has confirmed that aggregate exposure of children to isothiazolinone and paraben preservatives in personal care products remains within safe levels. This finding stabilizes the near-term regulatory outlook for these preservatives while reinforcing the use of refined aggregate modeling as the standard for future safety assessments.

17 Mar 2026, 20:29rivm.nlNetherlands

US HHS, USDA And EPA Announce Over $1 Billion Investments To Modernise Farming And Reduce Pesticide Use

US federal agencies committed over $1 billion in February 2026 to modernize farming and accelerate the transition away from chemical pesticides. This initiative signals a strategic shift toward regenerative agriculture that will likely drive future regulatory restrictions on traditional pesticides while incentivizing biological alternatives.

14 Mar 2026, 14:13hhs.govUnited States

EFSA Publishes PFAS Risk Assessment Workshop Report

EFSA has released a report detailing global and EU-level advancements in PFAS risk assessment, including new health-based guidance values for trifluoroacetic acid. Companies should anticipate more harmonized and stringent safety standards for PFAS mixtures and food contact materials as regulators move toward unified toxicity benchmarks.

14 Mar 2026, 13:30efsa.europa.euEuropean Union

US ATSDR Releases Interaction Profiles for Chlorinated Solvent and Indoor Air Chemical Mixtures

The US ATSDR has finalized toxicological interaction profiles for chlorinated solvent and indoor air mixtures to guide cumulative risk assessments. These benchmarks will likely inform future federal and state remediation targets and indoor air quality standards, increasing compliance pressure for sites with complex chemical footprints.

13 Mar 2026, 08:46atsdr.cdc.govUnited States

EU SCHEER Working Group Meeting On Chemical Mixtures (18 March 2026)

EU scientific advisors are advancing the assessment of chemical mixtures through a March 2026 meeting focused on finalizing draft opinions on cumulative risk. This technical work underpins a shift toward more stringent safety factors for multi-substance products, signaling future pressure on product formulations and market access.

13 Mar 2026, 06:28ec.europa.euEuropean Union