M18 monitoring discharges to water and sewer

Guide to operator self-monitoring (OSM) for discharges to the water environment and how to select analytical methods used for regulatory purposes.


TGN M18 - Monitoring of discharges to water and sewer

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This technical guidance note provides guidance for Environment Agency staff, monitoring contractors, industry and other parties interested in the monitoring of discharges to water.

Published 7 April 2014
Last updated 25 September 2017 + show all updates
  1. Update and reorganisation of method index and rewrite of section 5.5 to clarify sample storage temperature requirements.

  2. First published.