Saint Patrick's Lament

Hugh went down to the river, a bit downrange from town, saw the typically blue water a vibrant shade of green, and wondering if it was food dye or a green beer dump on this famous day, could not resist scooping up a swig. Only after he placed his parched lips in his palm did he detect the slimy texture. That night the local news noted that it was a very inopportune day for the sewage treatment plant to break down and be forced offline.