Its inspiration was Sydney Opera House and its paper-thin louvre windows are reminiscent of a luxury ocean-liner. More importantly, the people of Arklow in Ireland can finally go swimming without fear of floaters

It is not often that the arts section of a newspaper finds itself concerned with the aesthetic merits of a sewage works. But then there are few facilities designed with the finesse of the new €139m (£117m) wastewater treatment plant in Arklow, which stands like a pair of minty green pagodas on the edge of the Irish Sea. Nor are there many architectural firms who have thought so deeply about the poetics of effluent as Clancy Moore.

“There’s a wonderful passage in Ulysses,” says practice co-founder, Andrew Clancy, summoning James Joyce as we tiptoe along a metal gantry above a gigantic vat of bubbling brown sludge. “The narrator turns on the tap to fill a kettle, sparking a lengthy rumination on where the water comes from, how it flows from reservoirs, through aqueducts and pipes, describing each step in minute detail, from the volume of the tanks to the dimensions and cost of the plumbing.”