In order to determine the extent to which whole slurry or its constituents had penetrated below a slurry lagoon at ADAS Bridgets (ROAME B objective), two profile cores were removed to a depth of 30m in Summer 1993. Analysis of the pore water within the chalk matrix showed very high concentrations throughout the profile, of ammonium N, organic carbon and, to a lesser extent, phosphorus. Visual examinations showed that whole slurry was present within fissures down to 30m. Overall, the work has provided information which has improved the understanding of nutrient pollution from manures. Specifically, the results highlight the potential risk of ground water contamination by slurry under high slurry loading to soil.