Target 6d recommends recycling or treating all municipal and industrial wastewater prior to discharge. While this target aims primarily to reduce the detrimental impacts not only on human health, but also on the ecosystem, it seems that it leaves some loose ends given that it does not define a minimum treatment level nor does it reference the huge financial burden associated with the treatment of all domestic wastewater at the global scale. Several refinements of the targets and indicators initially proposed by the working groups will lead to a final list of targets supported by WHO and UNICEF. As of June 2013, the proposed list of targets is not in its final form, but has gone through several rounds of revisions.