Institutional Policy to Maximise Water Reuse

Universitas Islam Sultan Agung (UNISSULA) has an institutional policy in place to support water conservation and maximise the use of recycled water across university operations.

This policy is formally stated in Circular Letter No. 8386/J/SA/IX/2025, issued on 4 September 2025 and addressed to leaders and administrative units throughout Universitas Islam Sultan Agung.

The circular was issued as part of the university’s efforts to conserve electricity and clean water while maintaining environmental cleanliness across the campus.

Explicit Direction to Maximise Recycled Water

A key provision of the circular directly addresses the efficient use of clean water and the reuse of recycled water.

The policy instructs university units to use clean water appropriately, close water taps after use, and maximise the use of recycled water.

This provision establishes a clear institutional direction that water reuse should be maximised across university activities wherever appropriate.

University-Wide Scope

The circular applies across the institution rather than to a single faculty or facility.

It is addressed to faculty leaders, the Director of RSIGM, Bureau Heads, Heads of Institutions, Heads of UPTs, Heads of Units, and Heads of Administration within Universitas Islam Sultan Agung.

This broad institutional scope demonstrates that water conservation and water reuse are intended to be implemented throughout the university.

Water Conservation and Reuse in Campus Operations

The policy combines efficient use of clean water with the maximisation of recycled water.

This approach supports practical measures already implemented across the campus, including the reuse of:

• treated wastewater;
• harvested rainwater;
• recoverable non-potable water; and
• other suitable recycled water sources.

These water sources can be used for non-potable purposes such as landscape irrigation, cleaning, selected toilet flushing, pond replenishment, and other appropriate operational needs.

Rainwater Reuse

UNISSULA integrates rainwater harvesting into its broader water-management practices.

Rainwater collected from rooftops is directed into storage systems and can be reused for non-potable purposes. This reduces dependence on freshwater for activities that do not require potable water.

Examples include landscape irrigation, cleaning, selected toilet flushing, and pond top-ups.

Treated Wastewater Reuse

The university also supports the reuse of treated wastewater.

Wastewater and greywater are treated before being reused for appropriate non-potable purposes. This practice contributes to reducing demand for fresh water and supports more circular water use within the campus environment.

Supporting Infrastructure

The university’s water-reuse policy is supported by physical infrastructure and operational systems, including:

• wastewater treatment facilities;
• rainwater collection systems;
• in-ground water storage;
• campus retention and water-storage facilities; and
• non-potable water reuse systems.

These facilities allow the university to translate the institutional policy into practical water-reuse activities.

Institutional Responsibility

Circular Letter No. 8386/J/SA/IX/2025 was issued under university authority and signed on behalf of the Rector by the Vice Rector II of UNISSULA on 4 September 2025.

Its institutional distribution and formal issuance provide a governance basis for implementing water conservation and recycled-water use across the university.

The circular therefore establishes a university-wide direction to conserve clean water and maximise recycled water use across institutional operations.

Supporting Sustainable Water Management

The policy forms part of UNISSULA’s broader commitment to sustainable water management.

By promoting efficient use of clean water and maximising recycled water, the university seeks to:

• reduce demand for freshwater;
• increase the use of alternative water sources;
• improve resource efficiency;
• reduce unnecessary water consumption; and
• strengthen sustainable campus operations.

The policy also supports the continued development of water-treatment, rainwater-harvesting, and water-reuse systems across the campus.