Environmental Due Diligence in M&A: Liability Investigation and Security in Valuation

March 11, 2026
By Laís Rosa

In Mergers and Acquisitions (M&A) processes, Environmental Due Diligence (EDD) acts as the technical tool responsible for mapping contingencies that could compromise the profitability or legal security of the transaction. Unlike routine audits, EDD focuses on identifying critical risks and quantifying financial liabilities. In the 2026 capital market, the discovery of soil contamination or irregularities in fundamental licenses directly influences price negotiations, the structuring of escrow accounts, and indemnification clauses in the purchase and sale agreement.Share Purchase Agreement).

Ecominas provides technical intelligence in this process, enabling investors and boards of directors to make decisions based on the physical and legal reality of the assets being traded.

The Centrality of Soil and Groundwater Liabilities

The core of any environmental investigation in M&A lies in identifying soil and groundwater contamination. In the Brazilian legal system, liability for environmental damage is of a civil nature. propter remIn other words, it becomes part of the property. The buyer assumes responsibility for remediation, regardless of who originally caused the damage.

The technical investigation follows rigorous Site Environmental Assessment (SEA) protocols:

  1. Preliminary Assessment (Phase I): It involves a thorough analysis of the area's usage history, examination of multi-temporal satellite imagery, and on-site inspections to identify evidence of improper handling of hazardous substances or historical spills.
  2. Confirmatory Investigation (Phase II): It consists of collecting and analyzing soil and water samples in a laboratory. The goal is to verify if the concentrations of substances exceed the limits established by regulatory bodies, such as CETESB or IGAM.

Identifying a liability at these stages requires an estimate of remediation costs. These values are crucial for adjusting the purchase price or for retaining financial collateral during the closing of the deal.

Legal Compliance and Operational Risks

Beyond physical liabilities, Environmental Due Diligence analyzes the robustness of licensing and water use permits. The validity of operating licenses and strict compliance with technical conditions are vital for business continuity. If the target asset presents serious documentary flaws, the risk of post-acquisition embargoes increases significantly, compromising projected cash flow.

The analysis includes the history of infractions, outstanding fines, and the existence of Conduct Adjustment Agreements (TACs). Within the scope of technical governance, verification of the Solid Waste Management Plan (PGRS) and final disposal records serves as an indicator of operational maturity. Systemic failures in waste management may indicate hidden liabilities in unofficial disposal areas, generating risks of joint liability for the new owner.

Asset Resilience and Nature-Based Solutions (NbS)

By 2026, physical climate risk analysis will become mandatory for asset pricing in complex transactions. Modern Environmental Due Diligence assesses the vulnerability of the target company's infrastructure to extreme weather events. Assets located in areas at high risk of flooding or geological instability require specific protection strategies.

The presence of Nature-Based Solutions (NbS) It acts as a value differentiator. Projects that utilize green infrastructure for stormwater drainage or vegetation barriers for soil retention demonstrate greater resilience. During the investigation, the strategic consultancy assesses whether the asset is adequately adapted to these risks or whether it will require immediate investments in corrective engineering works. Resilient assets maintain their operational functionality and suffer less depreciation in climate stress scenarios.

Sustainable Urban Planning and Liquidity of Real Estate Assets

In mergers involving real estate or infrastructure portfolios, technical due diligence assesses urban planning guidelines and land use restrictions. The risk of "stranded assets" (stranded assetsThis occurs when a plot of land or building loses value because it does not meet contemporary urban sustainability requirements or due to subsequent environmental restrictions.

Planning based on Smart Sustainable Urban Planning It ensures that the asset possesses the necessary characteristics to maintain its liquidity. The audit verifies whether the venture is integrated into the local ecosystem and whether it is efficient in its use of resources. Ventures that ignore the socio-environmental impact of their surroundings face greater difficulties in divestment.exit), especially when the end buyers are institutional funds with strict ESG guidelines.

The Role of Ecominas in Protecting Valuation

Ecominas' strategic consulting translates environmental risks into financial clarity. Our work in M&A processes ensures that buyers and sellers operate on solid technical foundations. The precise identification of liabilities and the assessment of asset resilience allow for the structuring of legally sound and financially balanced contracts.

Environmental Due Diligence is the instrument that ensures the integrity of the investment, guaranteeing that growth through acquisition does not bring with it contingencies that would prevent a return on capital.

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