NEPM

NEPM

National Environment Protection Measure

A National Environment Protection Measure (NEPM) is a regulatory framework established under Australian environmental legislation to promote consistent environmental protection standards across states and territories. In contaminated land management, the National Environment Protection (Assessment of Site Contamination) Measure 1999, commonly known as the ASC NEPM, provides nationally recognised guidance for assessing soil and groundwater contamination, evaluating potential risks to human health and the environment, and determining whether further investigation or remediation is required.

Key Components

• National Environmental Standards: Establishes nationally consistent approaches to environmental protection, helping regulators, consultants, and property owners assess contamination using recognised scientific methods and guidelines.
• Site Contamination Assessment: The ASC NEPM provides guidance for Preliminary Site Investigations (PSIs), Detailed Site Investigations (DSIs), sampling methodologies, laboratory analysis, and the development of conceptual site models.
• Health & Environmental Risk Assessment: Includes health investigation levels (HILs), ecological investigation levels (EILs), and other assessment criteria used to evaluate potential contamination risks based on land use and exposure pathways.
• Regulatory Compliance & Remediation: Supports environmental consultants and regulators in determining whether contamination requires further assessment, risk management, or remediation in accordance with applicable state and territory legislation.

The ASC NEPM is a fundamental reference for contaminated land assessment in Australia, providing a consistent, science-based approach to identifying contamination, evaluating environmental and human health risks, and supporting informed decisions about site remediation, development suitability, and future land use.

Need Expert Advice on Contaminated Land Compliance?

Understanding and applying the ASC NEPM is an important part of managing contaminated land risks and meeting environmental obligations. CARAS provides specialist contaminated land advisory and remediation management services, helping property owners, developers, and project stakeholders coordinate site investigations, assess environmental risks, navigate regulatory requirements, and manage remediation works.

Learn more about our Contaminated Land Advisory & Remediation Services.

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