Water content is an important quality characteristic of solid fuels, necessary for converting test results to reference states. Three methods are specified for conventional determination of the water content of solid fuels such as hard coal, brown coal, coke, briquettes, peat and charcoal. Nominal water contents obtained when the 3 methods are applied to laboratory samples may differ systematically from each other, in relation to the state of carbonization. For agreement between interlaboratory results, it is essential to use the same method and adhere to the specified conditions.