This means that pollution that occurred some decades ago – whether from agriculture, industry or other human activities – may still be threatening groundwater quality today and, in some cases, will continue to do so for several generations to come.
Ciallaíonn sé sin go bhféadfadh truailliú a tharla roinnt blianta ó sin - bíodh gur tharla sé de bharr talmhaíochta, tionscail nó gníomhaíochtaí eile ag daoine - bheith ag bagairt fós ar chaighdeán screamhuisce sa lá atá inniu ann