The aim is to ensure a balance between extraction and recharge of groundwater, but the chemical status criteria are more complex and were not fully resolved at the time the WFD was adopted.
Is í an aidhm ná cothrom idir baint agus athlíonadh screamhuisce a chinntiú, ach tá na critéir maidir le stádas ceimiceach níos casta agus ní raibh siad socraithe go hiomlán nuair a glacadh leis an WFD.