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What is the Public Trust Doctrine?

Feb. 20, 2026

The Andhra Pradesh High Court recently observed that banks/bunds of tanks constitute an integral part of a water body, which needs to be strengthened from time to time, and any encroachment or construction on the same violates the Public Trust Doctrine.

About Public Trust Doctrine:

  • It is a legal principle asserting that the government acts as the custodian of certain natural resources for the benefit of the public.
  • It rests on the principle that certain resources have such great importance to the people as a whole that it would be wholly unjustified to make them a subject of private ownership.
  • Rooted in Roman law and developed through English common law, this doctrine encompasses various public assets such as tidal waters, lakes, rivers, wetlands, and ecosystems.
  • It imposes an obligation on the state to act as a trustee of natural resources.
  • The public is considered the owner of the resources, and the government protects and maintains these resources for the public’s use.
  • It guarantees that everyone has access to essential resources, which benefits society as a whole.
  • Three types of restrictions on governmental authority are often thought to be imposed by the public trust:
    • the property subject to the trust must not only be used for a public purpose, but it must be held available for use by the general public;
    • the property may not be sold, even for a fair cash equivalent;
    • the property must be maintained for particular types of uses.
  • It has emerged as a vital environmental and constitutional principle in India, ensuring the protection and preservation of natural resources for public use.
  • The Supreme Court held that the principle of the public trust is a part of the Indian legal system.
  • Supreme Court accepted that as far as “trusteeship” is concerned, there is not any doubt that the State is the holder of all natural resources in a fiduciary relationship with the public.

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