Why Does NWSDB Impose Sewerage Charges on Kolonnawa Customers but Not Colombo?

Residents of Kolonnawa and the suburbs are querying as to why the National Water Supply and Drainage Board (NWSDB) levies a sewerage charge in their area while exempting Colombo. Unlike a fixed fee, this charge increases exponentially with higher water consumption. Why are Kolonnawa’s NWSDB customers paying more than those in Colombo? Residents argue that, just as the Colombo Municipal Council (CMC) covers sewerage costs for its residents, the Kolonnawa Urban Council (KUC) should do the same. They urge the NWSDB to bill KUC instead of individual consumers.
Mohamed Zahran
Colombo