Orden de 25/05/1992 por la que se modifica la de 12 de noviembre de 1987 sobre normas de emisión, objetivos de calidad y métodos de medición de referencia relativos a determinadas sustancias nocivas o peligrosas contenidas en los vertidos de aguas residuales BOE n° 129 de 29/05/1992 Página 18317 (Marginal 12349)

This procedure updates the rules regarding emission standards, quality objectives, and measurement methods for harmful or dangerous substances found in wastewater discharges. It aims to protect water quality and ensure environmental safety by regulating the pollutants released into the water system. This affects industrial operators and entities responsible for wastewater treatment in Spain, requiring them to adhere to updated limits and monitoring methods for hazardous substances.