Regulation 7
Industrial waste water entering collecting systems and urban waste water treatment plants shall be subject to such pre-treatment as is required in order to–
protect the health of staff working in collecting systems and treatment plants;
ensure that collecting systems, waste water treatment plants and associated equipment are not damaged;
ensure that the operation of the waste water treatment plant and the treatment of sludge are not impeded;
ensure that discharges from the treatment plants do not adversely affect the environment, or prevent receiving water from complying with other Community Directives;
ensure that sludge can be disposed of safely in an environmentally acceptable manner.