收集区 meaning in English

collecting area
collecting region

These plans provide blueprints of the infrastructure required to collect sewage and direct it to treatment facilities before disposal into the sea
污水收集整体计划环保署已拟订了覆盖全港的16项污水收集整体计划，以集中处理各个污水收集区的污水。
Service activities relating to domestic sewerage purification in non - collective sewerage areas - guidelines for a diagnosis of self - contained sewerage installations and for the contractualization of their maintenance
非污水收集区家用污水净化服务活动.自备污水处理装置的诊断及其维修合同指南