Sewage Management. This will involve the construction of sewer networks and
wastewater treatment plant (WwTPs) in several locations in the MWCI concession
area. Som e of the WwTPs will treat combined sewage and drainage flows. Existing communal septic tanks servicing population already paying the sewer
charges will also be upgraded to secondary level of treatment. Sub-components
include: Taguig Sewerage System - This project is in line with the flood control
project of the Department of Public Works and Highways (DPWH) covering
Taguig, Pateros and parts of Rizal. The DPWH will construct four (4)
drainage/flood retention ponds adjacent to the Laguna de Bay. The proposed sewerage project will involve the development of the retention
ponds as part of a full wastewater treatment system to treat the sewage
before discharge to Laguna de Bay during the dry season. Riverbanks Sew age Treatm ent Plants - This project will involve the
construction of at least three (3) underground WwTPs along the riverbanks of
Pasig River, located in Makati, Mandaluyong, and Pasig. Sewage will be
intercepted and collected from existing drainage lines in these areas for
treatment before discharge to Pasig River. The rehabilitation of the drainage
outfalls and lines will be included in the project.