SAGIS River Concentration from Septic Tanks

This layer shows the mean concentration of phosphate in the river from Septic Tanks in mg/L as predicted by the SAGIS model in 2024. The data was originally provided by the Environment Agency to The Rivers Trust as point data with multiple points per WFD waterbody. These point values have been averaged to give a single value for each WFD waterbody. Any catchments without a WFD waterbody IDs have been excluded from the analysis. Links to more information on the SAGIS model can be found here: SAGIS UKWIR Source apportionment of nutrient contributions to rivers in England and Wales modelled with SAGIS