Subacute ruminal acidosis (SARA) has been considered a major pathology in high producingdairy herds for years. These findings were corroborated by several studies in Europe. However,different feeding practices and herds’ production levels are found in Southern Belgium. This studyaimed to ascertain whether dairy cows of several herds from the south of Belgium (Wallonia) witha suspicion of SARA really did present too low ruminal pH values. Twenty-four herds were visitedand 172 cows were sampled using an oropharyngeal device to collect ruminal fluid, i.e. Geishauserprobe. On the samples, three tests were performed: pH measurement, methylene blue reductiontest and microscopic evaluation of protozoa vitality. Based on these analyses, no cows demonstratedpH values lower than 5.5 and, only ten cows could be considered at risk for SARA. By contrast, ineightteen cows, pH values higher than 7.0 were measured and ruminal inactivity was suspected. Inthis study, ruminal alkalosis appeared to be more frequently observed than SARA.