SIST ISO 24516-1:2026/Amd 1:2026 PDF

Overview

SIST ISO 24516-1:2026/Amd 1:2026 provides essential guidance for the management of assets in drinking water distribution networks. This amendment introduces updated performance indicators and defines specific requirements for the monitoring and review of water supply systems. Additional real-world examples further clarify best practices for ongoing evaluation. Designed for water utilities, regulators, and asset managers, this standard supports continuous improvement in operational efficiency, service quality, and infrastructure longevity within the water and wastewater sector.

Key Topics

• Performance Indicators: Incorporates clear, measurable structural, operational, and user-related performance indicators for drinking water distribution networks, such as:

  • Number of bursts and interruptions of supply
  • Number and duration of interventions
  • User complaints (by type and frequency)
  • Water leakage rates and non-revenue water reduction

• Post-Completion Evaluation: Establishes procedures for evaluating project effectiveness after implementation, including annual or multi-annual performance reviews.

• Financial Impact Assessment: Recommends calculating the financial benefits associated with improved performance, such as reduced operating expenses (OPEX) and gains from water loss minimization.

• Periodic Reviews & Communication: Outlines the processes for regularly reviewing performance requirements and sharing outcomes with internal and external stakeholders, including management committees and regulatory bodies.

• Corrective Actions: Provides a framework for investigating and addressing inefficiencies, involving stakeholder consultations and adjustments in functional requirements, operational strategies, and budgeting.

• Reference Values and Inspection Frequency: Introduces tables with reference failure rates for distribution network components (e.g., service connections, mains, valves, hydrants) and recommended inspection intervals to benchmark asset condition and performance.

Applications

The amendment to ISO 24516-1 is directly applicable to organizations involved in the operation, maintenance, and management of drinking water distribution systems. Its practical value includes:

• Asset Management: Enhancing reliability and efficiency in water infrastructure through standardized monitoring and review methods.
• Performance Monitoring: Facilitating evidence-based decision-making by leveraging consistent performance indicators and reference values.
• Regulatory Compliance: Supporting compliance with local and international regulations by aligning performance evaluation processes with best practices.
• Stakeholder Communication: Improving transparency and accountability by formalizing the communication of performance data to both internal decision makers and external stakeholders.
• Continuous Improvement: Providing actionable guidance for identifying causes of underperformance and implementing targeted corrective actions to optimize service delivery and resource allocation.

Related Standards

• ISO 24510: Guidelines for the management of drinking water utilities and the assessment of drinking water services
• EN 805: Water supply - Requirements for systems and components outside buildings
• ISO 24540: Principles for effective and efficient corporate governance of water utilities
• DVGW W 400-3 (A): Technical Rules for Water Supply Systems – Part 3: Operation and Maintenance

By adopting SIST ISO 24516-1:2026/Amd 1:2026, water utilities and asset managers can significantly elevate their performance monitoring processes, ensuring sustainable water distribution services that meet evolving challenges and stakeholder expectations.