This study was aimed to assess the effectiveness of selected engineering and management measures, namely, oil sprinkling, low protein diet, high level of cleaning and manure pH manipulation, in reducing ammonia (NH₃) and respirable dust concentration in swine production rooms. Six grow-finish rooms at PSCI research facility were used with two as control and four as experimental rooms each employing one of the measures being investigated. Sampling equipment was installed in each room for measurement of ammonia and respirable dust concentrations within the room airspace. Worker exposure to ammonia and dust from the rooms was also assessed by equipping workers with a personal monitoring gear similar to those installed in the rooms. Ammonia levels were monitored using both the standard method and using commercial gas sensors. Results from completed trials so far showed that low-protein diet, pH manipulation of manure and employing high level of cleanliness could potentially reduce ammonia concentrations in swine production rooms. Among these various measures, only spraying of canola oil reduced dust levels inside the rooms. Moreover, average daily gain of pigs was relatively similar between control and experimental rooms. A benefit-cost analysis will be conducted after all trials are completed.