MAYNILAD Water Services Inc. has invested more than P41 billion to expand its wastewater treatment facilities within its West Zone concession area since 1997.

In a statement on Tuesday, Maynilad said the amount was used to build 19 new wastewater treatment facilities and upgrade three existing ones; buy 89 new vacuum trucks for septic tank cleaning; install 180 kilometers of new sewer lines; and maintain its sewerage system, among others.