Prevention of Water Pollution - Metals and Other Pollutants, Regulations, 2000​​ (5761-2000).

These Regulations, made under the authority of the Water Law and the Licensing of Businesses Law, are aimed at protecting water sources from heavy metals and other pollutants, by limiting the volume of wastewater discharged from pollution sources and reducing the concentration of pollutants in it. They set maximum concentration levels for 20 types of pollutants.
The Regulations set out requirements for a specific water treatment (counter-current rinse waters based on either 3-stage cascade rinsing or 2-stage cascade rinsing followed by an additional stage in which the rinse water is recycled). Fewer rinsing stages may be permitted if specified conditions are fulfilled. The Regulation, furthermore, provide with respect to, among other things: Prohibition on dilution of the wastewater in order to reduce pollutant concentrations; Prohibition on the discharge of wastewater to a pre-treatment facility before undertaking all reasonable means to reduce wastewater quantities and to prevent and reduce drag out and pollutant emissions from the production process to the wastewater; Prohibition on the discharge of wastewater that is not pre-treated in a pre-treatment facility and whose pollutant concentrations exceed those specified in the annex; Prohibition on the discharge of wastewater in which the concentration of suspended solids exceeds the limited enumerated in the annex Prohibition on the discharge of sludge from a plant except in accordance with the Licensing of Businesses Regulations (Disposal of Hazardous Wastes).