Where does my water come from?
Raw water monitoring
Water taken for supply is monitored for hydrocarbons before reaching the settling ponds. The hydrocarbon sensor (shown below) will send a signal to switch off the water take from the Makotuku River if hydrocarbons are detected.
Is my water treated?
The upgrade of the Raetihi Water Treatment Plant has seen the water treatment process increase from six stages up to thirteen stages with the addition of carbon dosing, flocculation tanks, filtration, UV disinfection and chlorine disinfection. Here is a diagram of the new schematic for the Raetihi Water Treatment Plant (RWTP) alongside the schematic design before the upgrade.
From the abstraction point at Tohunga Junction (State Highway 49 Bridge), gravity pressure is used to pipe the 'raw' water (or untreated water) to the settling ponds and eventually up to the Raetihi Water Treatment Plant located 7.4km away.
Where is my water stored?
Treated water is stored in the Raetihi water reservoir which provides storage for 900m3 (900,000L) of treated water. The upgrade included site development, flocculation tanks and a fit-for-purpose building shown in the photo below.
Water monitoring and treatment
The Raetihi Water Supply reticulation network consists of around 24km of pipeline. The entire network is gravity supplied. Most pipes are between 100 and 200mm in diameter with the more common material being Asbestos Cement. Sections of the township are being upgraded each year to new PVC pipework.
Community Open Day - Raetihi Water Treatment Plant
On 5 August 2018, Ruapehu District Council and Veolia hosted a Community Open day in Raetihi for the Raetihi community. The event was supported by Ruapehu District's Mayor Don Cameron, RDC's Chief Executive Clive Manley and in attendance were Iwi representatives from Ngati Uenuku, long time Raetihi residents, RDC and Veolia staff. The purpose of the day was to provide the opportunity for residents of Raetihi, local concillors and stakeholders to be guided around the plant and to see the new technology installed for the treatment of Raetihi town water supply.