_2684 Halkirk Wastewater Treatment Plant "<p>The only wastewater treatment plant in the Wick operational area. It treats sewage from the village of Halkirk and receives and treats sewage sludge from septic tanks around Caithness and part of Sutherland.<\/p>" Organization "<p>The only wastewater treatment plant in the Wick operational area. It treats sewage from the village of Halkirk and receives and treats sewage sludge from septic tanks around Caithness and part of Sutherland.<\/p>" 55.86362 -4.261207