To drive the delivery of evidence-based catchment solutions, better information is required about discharge quality from overflows and the impact on the receiving water quality.
Er mwyn llywio'r gwaith o ddarparu atebion dalgylch sy'n seiliedig ar dystiolaeth, mae angen gwell gwybodaeth am ansawdd rhyddhau o orlifoedd storm a'r effaith ar ansawdd y dŵr sy'n eu derbyn.