NOTE 1 Procedures for microbiological sampling are given in ISO 19458.[10]
NOTE 2 In cases where naturally occurring or artificially constructed dams result in the retention or storage of water for several days or more, the stretch of the river or stream should be considered as a standing water body. For sampling purposes, see ISO 5667‑4.
BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.