The Ohura Water Supply System provides potable water to approximately 156 properties within the Ohura community.
Where does my water come from?
Water for the Ohura Water Supply is taken from the Mangaparare Stream.
Is my water treated?
- Finer Filtration
Water is passed through layers of sand and gravel to further remove impurities. Small water molecules pass through the holes between sand and gravel pieces and clean water is collected in a drain at the bottom. Unwanted solids get stuck in the holes, and are thus retained in the sand and gravel medium. This medium is washed from time to time to remove the unwanted solids.
- Chlorination & pH Correction
The water is dosed with chlorine to kill off contaminants (bugs) in the reservoirs and pipes. pH correction is required to ensure effective disinfection with chlorine.
Online monitoring through System Control and Data Acquisition (SCADA) provides information about the water treatment, such as chlorine. This system checks that water parameters stay within set values for 24 hours every day and will alert the Plant Operator if anything changes.
Where is my water stored?
Treated water is pumped to the Ohura reservoir (225m3) before being gravity supplied to consumers within the township. The Ohura water reservoir is unique in the Ruapehu District in that it is underground.