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The Hautapu catchment at this point is recognised as a locally significant trout fishery.

The Hawea River is fed from Lake Hawea and prone to fluctuating flows due to hydropower generation. The Hawea River is popular for recreational activities. Water quality is expected to be excellent.

Located within the agricultural dominated Makarewa catchment, near Tussock Creek the site is a channelised stream with a gravel bed. River water quality data is collected here monthly and Macroinvertebrate data annually as part of Environment Southland's State of the Environment monitoring.

The Heriot Burn is a tributary of the Pomahaka River. This lower catchment site flows through rural land and significant areas of dairy farming. Water quality is poor.  There is a flow recorder located at this site. There is no public access to the river.

Hikutaia River water quality site at Old Maratoto Road - The catchment source is in the Kaimai ranges and flows into the Waihou River further downstream.

In 2020 Waikato Regional Council (WRC) transferred the monitoring functions of the Taupō catchment to Tūwharetoa Māori Trust Board (TMTB). This site is now monitored by TMTB. The water quality site is located a short distance upstream of the Hinemaiaia River State Highway 1 road bridge and is a...

This North Westland river drains a 20-mile length of the main alpine divide and is approximately 40 miles long. Before leaving the Southern Alps the Hokitika River is joined from the east by the Mungo River, of similar size, and then from the south by the Whitcombe River, which is actually larger th...

Home creek is located southwest of the Manapouri Township, upstream of the Waiau River.         River water quality data has been collected here since 2018.

The Hōteo River monitoring site is located on a high order stream in a low gradient valley approximately 22 km from the coast. The catchment is approximately 27,000 ha, with predominantly rural land use. This site was monitored by NIWA until March 2024 and is one of the original National River Water...

This site is located on the lower reaches of the Huangarua River just outside of Martinborough. The Huangarua River is a tributary of the Ruamāhanga River, and its catchment is located in the eastern Wairarapa.  Greater Wellington Regional Council monitors the water quality of this site (see the 'Sc...

The Huatoki Stream drains a 2,303 hectare catchment which rises in the Pouākai Range and flows across dairying land into suburban New Plymouth, through a bush-clad valley. The river quality site is located above the outlet of the Pukekura Park lake outflow. Water quality has been monitored at this s...

Hulls Creek is a small tributary of Te Awa Kairangi (Hutt River) that runs through the suburbs of Trentham, Silverstream and Pinehaven in Upper Hutt. This creek is downstream of the Silverstream Landfill, and until 1993 received treated sewage from the Trentham Military Camp. Greater Wellington moni...