Universitas Negeri Semarang (UNNES) applies water-efficient building standards and installs water-saving fixtures to minimise water use across campus facilities. Through its H-BAT assessment programme and reference to SNI 8153 on Plumbing Systems in Buildings, the university incorporates water conservation into building management, new construction, and the gradual upgrading of existing facilities.
Applying Technical Standards through H-BAT
UNNES assesses water-saving fixtures through its H-BAT programme—Hijau, Bersih, dan Sehat (Green, Clean, and Healthy Campus). The programme evaluates environmental performance across faculty and university buildings, including water conservation, energy efficiency, waste management, and environmental health.
On 28 July 2025, UNNES’s Subdirectorate of Conservation held a briefing to guide faculties and units in completing H-BAT assessments. Participants received explanations of assessment parameters and practical guidance on recording evidence, supporting consistent documentation of campus sustainability practices.
The technical reference identified for building plumbing is SNI 8153, “Sistem Plambing pada Bangunan Gedung” (Plumbing Systems in Buildings). This provides the plumbing standards context for the university’s implementation of water-efficient infrastructure, alongside the H-BAT Technical Standards Guideline.
Recording 1,251 Water-Efficient Fixtures in 2025
According to the university’s 2025 H-BAT assessment data, 1,251 of the 2,050 water fixtures assessed were classified as water-efficient, representing 61.03% of the total.
These installations include sensor-operated taps, which automatically control water flow, and dual-flush toilets, which allow users to select an appropriate flushing volume. Their use helps limit unnecessary water consumption during everyday campus activities.
The assessment measures the proportion of fixtures classified as water-efficient. It provides a basis for identifying further replacement needs and tracking the adoption of water-saving equipment across university facilities.
Incorporating Water Efficiency into New and Existing Buildings
Nearly all newly constructed campus buildings incorporate water-efficient fixtures as part of their infrastructure. This approach integrates water conservation into building provision from the outset.
For existing buildings, UNNES progressively replaces conventional fixtures with more efficient alternatives, taking account of asset condition and replacement requirements. These upgrades extend water-saving practices to older facilities while supporting the university’s ongoing infrastructure management.
A faculty-level example is documented in FMIPA’s report of 6 November 2025, which describes automatic taps in selected toilet facilities. These taps stop water flow automatically after use, helping prevent unnecessary water wastage.
Using Assessments to Guide Further Improvements
By combining technical references, fixture assessments, and phased infrastructure upgrades, UNNES translates water conservation into practical building management. The H-BAT inventory enables the university to monitor implementation and identify facilities where additional improvements are needed.
These measures support SDG 6: Clean Water and Sanitation by incorporating water efficiency into the design, operation, and maintenance of campus buildings.
