The Nutrient Budget Calculator for Wales is used to calculate phosphorus and nitrogen mitigation requirements for development within the catchment for rivers that are SAC’s.
Defnyddir Cyfrifiannell Cyllideb Maetholion Cymru i gyfrifo gofynion lliniaru ffosfforws a nitrogen ar gyfer datblygu o fewn y dalgylch ar gyfer afonydd sy'n ACA.