Irish Water (Section 16) Licensing of Trade Effluent into Sewers in Areas without Treatment Plants

Map of Irish towns and villages releasing raw sewage daily.

Note: this list is not comprehensive as the Irish Water database of Section 16 licenses does not include all agglomerations (catchment area for a waste water treatment plant), but it does highlight a question: how can Irish Water license trade effluent discharges to sewers where there is no treatment plant