Amounts of sedimentary chlorophyll degradation products were determined for surface sediments from nine Connecticut lakes. The relationship between sedimentary chlorophyll degradation products in the ignitable matter of the mud and the hypolimnetic oxygen deficit: was not significant at the 5% level, nor was the relationship between the former and the average summer seston chlorophyll. Shallow water sediments tended to have lesser amounts of sedimentary chlorophyll degradation products than deep water sediments.