The effectiveness of a cross-flow, packed-bed, wet scrubber for particle, ammonia, and odour removal from swine confinement building exhaust was evaluated. A prototype was designed to study the effects of changing air speed and packing thickness. It consists of a stoneware packing system (thickness 5.1 – 30.5 cm) made out of rashig rings (1.2 cm diam.) held in place by a 0.6 cm mesh screen, a water system consisting of a reservoir, pump, piping, valves and a distributor and an air system consisting of a fan, baffle mixing chamber, and baffle demister. The water pumped to the reservoir above is distributed over the packing through which it passes to a collection tank to be recycled. A uniform air flow at the packing surface receives water particles which are then removed by the demister. The scrubber was able to achieve 90% removal of particles larger than 5 mu m diam., a significant reduction in odour intensity, and an ammonia concentration reduction of 21%.