Effective 1 January 2008, IWK is not responsible for providing scheduled desludging service of septic tanks. Under the Water Services Industry Act 2006, owners of premises with septic tanks are responsible for the maintenance of the septic tanks.
The maximum volume of sludge that a septic tank can store is approximately one third of its total volume. Regular desludging or removal of the accumulated sludge in the tank is critical to prevent water pollution. The frequency of desludging is dependent on the capacity and design of the septic tank. Septic tanks designed according to Malaysian Standards (MS 1228) need to be desludged regularly at least once every two years.
Under section 65(1) of the WSIA 2006, the owner, management corporation or occupier of any premises having a septic tank shall :-
Customer is required to pay for the desludging service provided by a licensed contractor or IWK.
Without scheduled desludging, untreated sewage and sludge solids will be released into rivers. This will cause depletion of dissolved oxygen in these rivers, resulting in the death of aquatic life. The large quantities of sludge that settle to the bottom of rivers will also kill off any aquatic plants that contribute oxygen to the rivers. This will cause our rivers to eventually 'die'. In addition, untreated sewage also poses a threat to public health since it may contain pathogenic bacteria and viruses that cause deadly diseases such as cholera, typhoid and hepatitis A.
All septic tanks need to be desludged on a regular basis, that is once in two years.
For more information,please contact IWK Customer Service Centres