Chemistry for the Dorset lakes (Blue Chalk, Chub, Crosson, Dickie, Heney, Red Chalk). Samples for chemical analysis are taken from each lake with a peristaltic pump using Tygon tubing. Samples of water are taken at 2 metre intervals, starting at 1 metre. Aliquots of that water, proportional to the volume of the stratum each depth represents are combined for the epilimnion, the metalimnion and the hypolimnion for chemical analysis. The mean annual epilimnetic data is presented in the file LAKECHEM.TXT. These data are in ASCII format and tab delimited as requested.