In facilities on land where external nutrient sources are used, the nutrient levels in the effluent water shall be verifiably the same, or lower, than the inflowing water.
I saoráidí ar talamh ina n-úsáidtear foinsí seachtracha cothaitheach, beifear in ann a fhíorú go bhfuil leibhéil na gcothaitheach san uisce eisilteach mar an gcéanna, nó níos ísle ná mar atá san uisce atá ina shruth isteach.