Quality Assurance for Freshwater Quality Monitoring - Technical Guidance Document

This technical guidance document introduces the principles and practices of quality assurance for freshwater quality monitoring. It is designed for scientists and practitioners working in field and laboratory environments who may not have specialised expertise in quality assurance. The document explains how planned and systematic procedures help ensure that monitoring data accurately represent the condition of water bodies. It outlines the roles of quality assurance and quality control within a broader quality management system and emphasises the importance of establishing clear data quality objectives before monitoring begins. The guidance also describes how monitoring programmes should manage the full sample life cycle, including sampling, handling, transport, analysis, and data verification, to minimise errors and ensure reliable results. Although the focus is on freshwater systems, the principles and procedures described are broadly applicable to other aquatic monitoring contexts, including drinking water, wastewater, and industrial effluent monitoring, where dependable environmental data are required for assessment and decision-making.