The impact of disinfected treated wastewater in a raw-water reservoir

During the 1995-97 drought, serious difficulties were experienced by Essex and Suffolk Water in obtaining sufficient water to meet demand. As an emergency measure, a consent to discharge up to 30 Ml/d of ultraviolet disinfected treated wastewater into a raw-water reservoir was obtained from the Environment Agency. Performance of the ultraviolet plant and results of monitoring are reported, reporting procedures are outlined, and the reaction of media and water consumers are described.