Circular Economy
Post-Closure Monitoring
Definition
Post-closure monitoring is the systematic measurement and inspection carried out after a facility — mine, landfill, waste repository or industrial site — stops operating, to verify that containment systems perform, pollution remains within limits and physical stability is maintained. Regulatory regimes typically mandate defined monitoring periods (for landfills often 30 years or more) with financial provision secured in advance.
References
Supports definition and framing.
Supports definition and framing.
Overview
How it is used
The requirement appears in landfill directives, mining closure laws, tailings standards (such as the Global Industry Standard on Tailings Management) and nuclear waste programmes, where monitoring horizons extend to centuries.
Why it matters
Environmental liabilities outlive operations; post-closure monitoring is the mechanism that converts "closure plans on paper" into verified, long-term site safety.