ESRS E2 Pollution Disclosure: The 2026 Guide to Air, Water, Soil and Substances of Concern Under CSRD

Among the five environmental standards in the European Sustainability Reporting Standards, ESRS E2 Pollution is the one most likely to surface a disclosure that companies never previously made public. Air, water and soil emissions have been regulated under EU law for decades, but the obligation to translate operational permits and pollutant release data into an investor-grade sustainability statement is new — and the first wave of CSRD reporters has found that translation harder than it looks.

ERM noted in early 2025 that E2 was catching companies off-guard precisely because pollution data lives in environmental compliance silos, not in sustainability or finance teams. The data exists; it just does not arrive in the format ESRS E2 requires. This guide walks through what the standard actually demands in 2026, what the Omnibus-amended draft changes, and where companies should be focusing their effort before the next reporting cycle.

What ESRS E2 Covers

ESRS E2 addresses pollution generated by a company’s own operations and value chain across four pollution pathways and one cross-cutting category:

Pollution of air
Pollution of water
Pollution of soil
Pollution of living organisms and food resources
Substances of concern and substances of very high concern, including microplastics

The standard contains six disclosure requirements, structured to mirror the policy–action–target–metric–financial-effect architecture used across the topical ESRS:

E2-1 — Policies related to pollution
E2-2 — Actions and resources related to pollution
E2-3 — Targets related to pollution
E2-4 — Pollution of air, water and soil
E2-5 — Substances of concern and substances of very high concern
E2-6 — Anticipated financial effects from pollution-related risks and opportunities

E2 is only mandatory where pollution is identified as a material topic through the company’s double materiality assessment. In practice, this means industrial operators, chemical companies, food and beverage manufacturers, mining and metals, energy generation, transport, and construction will almost always land in scope. Pure-play financial services and software companies often will not — though their value-chain exposures may still raise material risks.

What Changed Under the Omnibus

The European Commission’s Omnibus simplification package, published in early 2026, prompted EFRAG to release a revised draft of all ten ESRS in December 2025. The amended standards are not yet legally binding — adoption by the Commission is expected in summer 2026, and the new versions apply to financial years beginning on or after 1 January 2027.

For ESRS E2 specifically, three changes matter for how companies should prepare:

First, the substances-of-concern (SoC) metric is now scoped primarily to chemical-sector companies. Under the original standard, every reporter that found pollution material had to disclose total volumes of SoC produced, used, distributed, commercialized, imported and exported. The amended draft narrows the full SoC reporting to undertakings in the chemicals sector. Non-chemical companies still disclose substances of very high concern (SVHCs), but the broader SoC universe is no longer their burden.

Second, microplastics reporting is retained but clarified. Companies that intentionally produce microplastics, or whose products release microplastics during use or end-of-life, must still disclose the quantities. The EFRAG guidance now points explicitly to the REACH restriction on synthetic polymer microparticles (Regulation 2023/2055) as the alignment reference.

Third, the number of mandatory datapoints has dropped. EY’s Issue 11 EU Sustainability Developments briefing summarises the cut as a roughly two-thirds reduction in mandatory datapoints across the full ESRS package, with E2 sharing in that simplification. The standard still asks the same five questions — what is your policy, what are you doing, what are your targets, what did you release, and what does it cost — but each question requires fewer pre-defined fields.

Companies preparing 2026 reports under the original ESRS should map their existing datapoints to the amended structure now, so the 2027 cycle does not require a second round of system rework.

E2-4: Pollution of Air, Water and Soil

E2-4 is the metrics core of the standard. Companies must disclose the amounts of pollutants emitted to air, water and soil during the reporting period, broken down by pollutant and split between direct and value-chain emissions where material.

The pollutant list aligns with the European Pollutant Release and Transfer Register (E-PRTR), which is being superseded by the Industrial Emissions Portal Regulation (IEPR). The IEPR was adopted on 12 April 2024 and entered into force on 22 May 2024; it applies from 1 January 2028, with the first reports under the new regulation published in 2028 covering 2027 releases. For 2026 reporting, the older E-PRTR framework is still the reference. Reporting teams whose installations already submit to national PRTRs can — and should — use that data as the starting point for E2-4.

Three pitfalls recur in first-year E2-4 disclosures:

Boundary mismatch. Permit data covers installations above regulated thresholds. ESRS E2 asks for material pollution irrespective of whether a specific facility crosses an E-PRTR or BAT-AEL threshold. A small unregulated facility can still produce material emissions; companies that simply re-export their E-PRTR filing miss this.

Pollutants that are material but not regulated locally. Not every jurisdiction the company operates in publishes a comparable PRTR. Operations in non-EEA countries — particularly in jurisdictions without an established pollutant register — require an internal measurement and estimation methodology, documented for the auditor.

Value-chain emissions. E2-4 expects material upstream and downstream emissions to be disclosed where information is available. This is harder than it sounds because primary data from suppliers is rarely available. The accepted approach is to combine activity data with emission factors — analogous to a Scope 3 estimation — and to document the methodology, data quality and uncertainty.

E2-5: Substances of Concern and SVHCs

E2-5 sits at the intersection of CSRD and chemical safety law. The disclosure asks companies to report the production, use, distribution, commercialization and import/export of substances of concern, with substances of very high concern presented separately. SVHCs are the substances on the ECHA Candidate List — currently substances meeting the criteria of Article 57 of the REACH Regulation — and include CMRs, PBTs, vPvBs, and endocrine disruptors.

The 0.1% by weight threshold in articles — the REACH SVHC notification trigger — is the same threshold ESRS E2-5 uses for product-embedded SVHCs. This is one of the few places in CSRD where the disclosure metric directly mirrors an existing chemical-safety regulation, which means the data should already be tracked through REACH-driven supplier declarations and SCIP database submissions. The work in E2-5 is consolidating that existing data into a single disclosure rather than collecting it for the first time.

Under the amended draft, non-chemical-sector companies report SVHCs only; full SoC mass reporting is retained for the chemicals sector. This is one of the clearer wins for non-chemical reporters from the Omnibus simplification.

E2-6: Anticipated Financial Effects

E2-6 carries pollution risk into the financial statements line of sight. Companies must disclose the anticipated financial effects from material pollution-related risks and opportunities, expressed in monetary terms where possible. Common drivers include the cost of regulatory non-compliance (fines, BAT-AEL retrofitting), litigation and remediation liabilities, capex to phase out SVHCs, and revenue impacts from products restricted under REACH or the EU Chemicals Strategy.

E2-6 is the standard where assurance providers ask the hardest questions. The financial effect cannot be a generic warning; it must be a quantified or quantifiable estimate, linked to a defined risk, with a stated time horizon and methodology. Companies that have not yet integrated pollution risk into their enterprise risk register will find this disclosure exposes that gap.

How AI and Reporting Software Help

ESRS E2 data lives in HSE management systems, environmental permit databases, chemical-inventory tools, supplier portals, and laboratory analysis reports. Almost none of it is structured the way the sustainability statement needs it. This is a classic data-engineering problem more than a sustainability problem — and where AI-powered reporting platforms add the most leverage.

Socious Report ingests the source files from each of these systems, maps the data to the relevant E2 datapoints, applies the boundary and materiality logic, and produces a tagged disclosure that links back to the underlying evidence. For value-chain pollution and SVHC tracking — the areas where most teams currently rely on email and spreadsheets — the platform consolidates supplier declarations and flags gaps before assurance review.

What to Do Before the Next Reporting Cycle

For 2026 reporters, the priorities are:

Confirm whether pollution is material via the double materiality assessment, and document the rationale either way.
For each material pollutant pathway, map operational data sources to E2-4 datapoints and identify boundary gaps.
Consolidate REACH and SCIP data into a single SVHC inventory aligned with E2-5.
Embed pollution risk in the enterprise risk register so E2-6 financial effects have a defensible methodology.
Begin testing the amended ESRS datapoint set against current data to avoid double rework when the 2027 standards take effect.

Pollution is the standard where CSRD most directly connects sustainability disclosure to existing environmental regulation. Treating it as a data consolidation problem — rather than a new measurement problem — is the fastest path to a disclosure that survives assurance.

Book a 30-minute walkthrough of how Socious Report handles ESRS E2 — including value-chain pollution, SVHC tracking, and E2-6 financial-effect modelling — or read the Socious Whitepaper for the full architecture of audit-ready sustainability reporting.