All the water from the Waihou river is spring fed and it takes up to 100 years to come from the Mamaku Plateau at 42 cubic metres per minute. The water stays about 11 degrees Celsius in winter or summer. The water itself is extremely clear and blue because of the lack of particles which absorb light (water itself only absorbs red light, making it look blue/green). A lot of NZ water is bottled out of this stream and I heard it's the second most pure bottled water in the world.
Here's my sister Emma, my new bro in law Kyle (pushing Tyla), me and my Mum in the background: