Understanding Significant Environmental Aspects Today

Share with

Contents

Every organisation that interacts with the environment - through its operations, products, or services - produces environmental aspects. But not all aspects carry the same weight. Some have a higher potential to cause harm, exceed legal thresholds, or trigger community concern. These are called significant environmental aspects, and they sit at the core of any effective environmental management system.

Understanding which aspects are significant - and why - shapes how an organisation sets its environmental objectives, allocates resources, and builds operational controls. Without this clarity, EMS efforts become scattered and difficult to justify to auditors or stakeholders.

This page covers what significant environmental aspects are, how significance is determined, and how organisations can manage them systematically.

What Are Environmental Aspects and Impacts?

Before defining significance, it helps to distinguish between aspects and impacts.

An environmental aspect is any element of an organisation's activities, products, or services that can interact with the environment. Examples include fuel combustion, water withdrawal, chemical storage, or waste generation.

An environmental impact is the change that results from that interaction - air pollution, groundwater contamination, habitat disruption, or resource depletion.

The relationship is direct: aspects cause impacts. The aspect identification process maps this relationship across all relevant operations, including normal conditions, abnormal conditions (like start-up or shutdown), and reasonably foreseeable emergencies.

What Makes an Environmental Aspect Significant?

ISO 14001:2015 requires organisations to determine which of their environmental aspects are significant, but it does not prescribe a single method. Organisations define their own criteria, which must be documented and applied consistently.

What Makes an Environmental Aspect Significant?

Common criteria used to evaluate significance include:

Scale and severity - How large is the potential impact? A minor chemical spill differs from a bulk storage leak near a waterway.
Frequency - How often does the aspect occur? Daily emissions carry more cumulative weight than a quarterly equipment test.
Reversibility - Can the environmental damage be undone? Soil contamination from hazardous waste may be irreversible.
Legal and regulatory relevance - Does the aspect fall under applicable environmental regulations? Legal exposure automatically raises significance.
Stakeholder concern - Are neighbouring communities, regulators, or customers concerned about this aspect? Perception matters, particularly in public-facing industries.
Probability of occurrence - For abnormal or emergency conditions, the likelihood of the aspect occurring is factored in.

Organisations typically assign scores or ratings across these criteria and apply a threshold to determine whether an aspect qualifies as significant. This structured approach makes the determination defensible during audits.

The Link Between Significance and ISO 14001 Requirements

Significant environmental aspects are not just a planning exercise - they have direct consequences for how the EMS is structured. Under ISO 14001, significant aspects must be:

Communicated within the organisation at relevant functions and levels
Considered when setting environmental objectives and targets
Addressed through operational controls or documented procedures
Monitored and measured to verify that controls are working
Included in the scope of internal audits and management reviews

This means the significance determination directly influences where operational effort and budget are concentrated. An aspect that clears the significance threshold cannot simply be noted and filed - it must be actively managed.

Normal, Abnormal, and Emergency Conditions

One of the common gaps in significance assessment is limiting the analysis to routine operations. ISO 14001 requires organisations to consider three operating conditions:

Normal, Abnormal, and Emergency Conditions

Normal conditions cover day-to-day activities - production runs, routine waste disposal, standard energy use. Most aspects identified here are well understood.

Abnormal conditions include planned but non-routine activities such as equipment maintenance, cleaning cycles, or process changeovers. These can generate aspects not present during normal operations.

Emergency conditions cover unplanned events - chemical spills, equipment failures, or fire. Even if the probability is low, potential impacts from emergency scenarios can be severe enough to qualify as significant.

Addressing all three conditions gives the assessment its full scope and protects the organisation from gaps that auditors frequently flag as nonconformances. For guidance on avoiding common ISO 14001 nonconformances, including incomplete aspect assessments, structured tools can help.

Recording Significant Environmental Aspects

Once significance is determined, findings must be documented. The standard tool for this is the aspect impact register, which captures:

The environmental aspect and associated activity
The resulting environmental impact
The operating condition (normal, abnormal, emergency)
Significance criteria scores and overall significance rating
Existing controls
Links to environmental objectives or programs

This register is a living document. It needs to be reviewed whenever there are changes to operations, new activities are introduced, or new legal requirements come into force. A register that is updated once and shelved provides limited value - and weak audit evidence.

Translating Significant Aspects into Operational Controls

Identifying significant environmental aspects is only useful if it leads to action. For each significant aspect, organisations should establish controls proportionate to the level of risk involved.

Controls can take different forms:

Engineering controls - Equipment modifications, containment systems, filtration or treatment units
Administrative controls - Documented procedures, work instructions, operator training
Monitoring and measurement - Regular testing, emission tracking, discharge sampling

For example, if fuel combustion from fleet vehicles is identified as significant due to air quality impacts, controls might include a vehicle maintenance schedule, driver training on fuel-efficient practices, and monthly fuel consumption tracking.

The connection between significant aspects and operational procedures is a core element of a functioning EMS. Organisations that translate ISO 14001 environmental aspects into operational procedures tend to perform more consistently in both audits and real-world environmental performance.

Significant Aspects Across Different Industries

Significant environmental aspects vary considerably depending on the sector. A few examples:

Manufacturing - Air emissions from production processes, wastewater discharge, hazardous waste generation, and energy-intensive machinery are frequently significant.
Construction - Noise pollution, soil disturbance, runoff from excavation sites, and waste from demolition often rise to significance.
Oil and gas - Hydrocarbon spills, flaring emissions, and produced water management are typically among the highest-significance aspects due to regulatory exposure and impact severity.
Office environments - Energy consumption, paper waste, and refrigerant use from HVAC systems can be significant when assessed against the organisation's scale and legal context. A detailed look at key environmental aspects for ISO 14001 in the office covers this in depth.

Understanding sector-specific patterns helps organisations prioritise their initial assessment and benchmark their controls against industry norms.

Common Mistakes in Significance Determination

A few recurring errors weaken the credibility and usefulness of significance assessments:

Using criteria inconsistently - Applying different scoring logic to similar aspects makes the results unreliable and difficult to defend.

Ignoring life cycle perspective - ISO 14001 asks organisations to consider aspects across the product or service life cycle, not just on-site activities. Upstream supplier emissions or downstream product disposal may also be relevant.

Treating it as a one-time exercise - The aspect assessment must be updated when changes occur. New equipment, new processes, new regulations, or new facilities all warrant a review.

Failing to communicate results - Employees who carry out operations related to significant aspects need to understand what those aspects are and what controls are expected of them.

Managing Significant Environmental Aspects with Software

Managing significant environmental aspects through spreadsheets and paper-based registers becomes difficult to maintain as operations grow. Version control, access, update frequency, and audit readiness all become harder to sustain manually.

Effivity's EMS software provides a structured environment for recording aspects and impacts, assigning significance, linking controls, and tracking environmental objectives - all within a platform designed around ISO 14001 requirements.

Get a Free Personalized Demo to see how Effivity supports the full aspect management process from identification through to monitoring and reporting.

Free Demo →

Frequently Asked Questions

It is an environmental aspect that has or can have a significant environmental impact, determined using criteria set by the organisation and applied consistently.

The organisation determines its own significance criteria. These criteria must be documented and applied consistently across all aspects assessed.

No. ISO 14001 requires criteria to be established but leaves the choice of criteria to the organisation, provided they are applied consistently.

They should be reviewed periodically and whenever there are changes to operations, legal requirements, or significant incidents that affect the assessment.

Uncontrolled significant aspects can result in environmental harm, regulatory penalties, audit nonconformances, and reputational damage.

Yes. Changes in scale, frequency, legal context, or stakeholder concern can shift an aspect from non-significant to significant over time.

An aspect is the activity or condition that interacts with the environment. An impact is the resulting change to the environment caused by that aspect.

Share with