| Coverage | Trend | Range |
|---|---|---|
| Contractors pollution liability (CPL) | Flat to +5% | |
| Site pollution liability (PLL/EIL) | Flat to +10% | |
| Combined environmental + casualty/professional/excess | +5% to +10% |
Key takeaways
- Recent market expansion has resulted in all-time high capacity and downward pressure on rates despite the increasing cost of claims
- Carriers are responding to the operational exposures of Data Centers with specialized coverage for noise disturbance and radioactive materials
- Clients are enhancing their environmental incident reporting protocols / expense documentation to potentially improve claim outcomes
- Programs for new Data Center projects are addressing diverse exposures (construction, cooling, fire suppression, noise, radioactive material)
Markets
Environmental insurance markets entered 2026 following the merger of several environmental insurers with differing business strategies. As carriers refine their approaches to capacity, policy terms and pricing, competition continues to create favorable conditions for many buyers.
Despite broader economic uncertainty, insurers continue to expand environmental product offerings and underwriting appetite to address evolving client needs. Layered insurance programs can help organizations access additional capacity while strengthening relationships across multiple insurers.
Environmental insurance also remains an important tool for mergers and acquisitions (M&A), real estate transactions and broader investment strategies where environmental liabilities can affect risk profiles and transaction outcomes.
Products
As remediation standards for PFAS (per- and polyfluoroalkyl substances) and other emerging contaminants continue to evolve, restrictions are becoming more common across traditional property and casualty programs. Environmental insurance may continue to offer solutions for organizations with limited exposure to these risks.
Insurers are also adapting existing products and developing new risk transfer approaches to support emerging opportunities, including carbon sequestration projects and representations and warranties coverage for M&A transactions.
Ethylene oxide (EtO) remains an emerging contaminant to watch as recent court decisions highlight potential liabilities even when emissions occur within permitted regulatory limits.
Claims
Rising remediation costs and the potential for claims spanning environmental, property and general liability coverages are encouraging insurers to become involved earlier in the claims process. Early engagement can help manage complex claims and support more effective outcomes.
Recent losses involving transportation exposures and non-owned disposal locations continue to demonstrate the value of these environmental coverages. Meanwhile, insurers generally continue to offer affirmative coverage for indoor air quality exposures, including mold and Legionella, while using underwriting tools to manage risk.
Expanded regulatory monitoring of PFAS is also creating new claims activity at both active and previously remediated sites, increasing attention on long-term environmental liabilities.
Construction
Environmental risks within the construction sector continue to expand. Regulatory uncertainty and economic pressures are contributing to increased underwriting scrutiny of property acquisitions, redevelopment projects and operational changes. Insurers may require greater visibility into future site use and redevelopment plans.
Stormwater management and excessive siltation remain significant drivers of environmental losses, including on renewable energy projects such as solar and wind developments. In response, insurers are expanding products that combine contractors pollution liability, professional liability and site pollution coverage into broader environmental solutions.
Redevelopment claims involving preexisting conditions, soil management and voluntary site investigations remain common. Organizations should also expect continued underwriting attention to PFAS-related exposures associated with construction activities.
Disclaimer
WTW hopes you found the general information provided here informative and helpful. The information contained herein is not intended to constitute legal or other professional advice and should not be relied upon in lieu of consultation with your own legal advisors. In the event you would like more information regarding your insurance coverage, please do not hesitate to reach out to us. In North America, WTW offers insurance products through licensed entities, including Willis Towers Watson Northeast, Inc. (in the United States) and Willis Canada Inc. (in Canada).
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