In addition to the volume of wastewater returned to the environment, it is also important to measure or estimate the volumes of different pollutants emitted with the wastewater or otherwise released to water bodies. Emissions to water are the substances released to water resources by establishments and households as a result of production, consumption and accumulation processes. Emissions to water should be disaggregated according to the releasing economic activities and should cover the most important substances. This subcomponent includes statistics on the amount and characteristics of waste, defined as discarded material for which the owner or user has no further use, generated by human activities in the course of production and consumption processes.