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River Mease SAC: nutrient neutrality calculator

Calculate nutrient budgets for developments in the catchment of River Mease SAC.

Applies to England

Documents

Details

Use this calculator to work out the nutrient budget for proposed developments in the catchment of River Mease SAC.

The calculator includes all the wastewater treatment work upgrades required under the new Water Industry Act 1991 duty, as announced in May 2024.

It also reflects improvements that will be made to wastewater treatment works between 2025 and 2030 under the Water Industry National Environment Programme (WINEP) as published in January 2025.

It also reflects earlier completion dates for select wastewater treatment work permit upgrades within the River Mease catchment.

Instructions are given in the calculator, but you should also read the guidance document.

Find the guidance and all 27 calculators in the nutrient neutrality resources collection.

Updates to this page

Published 28 February 2024
Last updated 27 May 2025 show all updates
  1. Updated the calculator with a version that reflects improvements that will be made to wastewater treatment works between 2025 and 2030. This is under the Water Industry National Environment Programme (WINEP) as published in January 2025. The calculator also reflects earlier completion dates for select wastewater treatment work permit upgrades within the River Mease catchment.

  2. Amended the River Mease nutrient neutrality calculator, to reflect Technically Achievable Limit (TAL) upgrades to 0.25mg of Total Phosphorous per litre from 2030 at the Overseal and the Snarestone Wastewater Treatment Works.

  3. First published.

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