This part of ISO 5667 provides guidance on the sampling of groundwaters. It informs the user of the
necessary considerations when planning and undertaking groundwater sampling to survey the quality of
groundwater supply, to detect and assess groundwater contamination and to assist in groundwater resource
management, protection and remediation. This part of ISO 5667 does not apply to sampling related to the
day-to-day operational control of groundwater abstractions for potable purposes. The guidance includes
sampling of groundwater from both the saturated (below water table) zone and the unsaturated (above the
water table) zone.