Water Quality Sampling Best Practices — A Laboratory Perspective

## Session Description Poor sampling is the most common cause of unreliable water quality data — errors that no analytical technique can correct. This webinar covers the full sampling chain from programme design to laboratory receipt. ## Topics Covered 1. Sampling programme design: frequency, locations, and parameters by intended use 2. Container selection: HDPE vs. glass vs. special containers by analyte class 3. Preservation: chemical preservatives, temperature, and hold times per ISO 5667 series 4. Field blanks, trip blanks, and duplicates: when and how many 5. Chain of custody documentation and common gaps 6. Case study: how a single mis-labelled container invalidated a month of PFAS monitoring data