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Guidance: Minimum requirements for self-monitoring of flow: MCERTS performance standard

Environment Agency

August 28
12:57 2024

The Environment Agency set up the monitoring certification scheme (MCERTS) to provide guidance on the standards you must meet to monitor emissions that affect the environment.

This standard applies if you have a permit under the environmental permitting regulations and that permit says you must:

  • monitor liquid flow (for example, sewage or trade effluent)
  • collect and record the results of your monitoring

This standard specifies the minimum requirements for self-monitoring flow where operators have installed meters to conform to the Environment Agencys permit requirements.

Natural Resources Wales permits may also specify that flow monitoring systems are certified against this standard.

Updates to this page

Published 3 February 2022
Last updated 28 August 2024 +show all updates
  1. Updated point 2.4 to clarify the requirements for surveillance. Updated section 3 to clarify how to meet flow monitoring requirements, including adding a new point 3.1.5. Added new point 3.2.5 on product certification for new or replacement flowmeters. Updated point 5.1.4 to clarify how to carry out the calculation for estimating uncertainty of the total daily volume for effluent flow monitoring.

  2. New clauses (1.4 and 2.3.2) specify requirements for issuing certificate and to permit certificate withdrawal for non-payment. Requirement for inspector to confirm meter suitability added (3.1.5, 3.2.5, 3.4.1). Addition of a date to allow use of legacy meters installed before April 2010 (3.0 and 7.0). Some restructuring and reordering of sections to improve document flow and clarity, a few clauses rewritten for clarity.

  3. First published.

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