On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Farm runoff 3

The stilling well with its lid removed, revealing the water level instrument and the NEON metering module mounted on top of it. The float, counterweight and float wire, that couple the position of the water surface to the encoder, are contained within the pipe below the water level instrument. Photo: Evan Baddock