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The Tūtaekurī River at Brookfields Bridge site is a HBRC fresh water quality & ecology monitoring site.

The Tūtaekurī River at Lawrence Hut site is a HBRC fresh water quality and ecology monitoring site.

The Tūtaekurī River Dartmoor site is a HBRC fresh water quality and ecology monitoring site.

The Twizel River is monitored for recreational water quality at a picnic area located off Glen Lyon Rd to the North of the Twizel township.  This site is monitored for recreational water quality during the summer months only.

The Uawa covers a catchment area 536km2 near Tolaga Bay north of Gisborne. Land use includes extensive sheep and cattle farming with significant areas that have recently changed (since the 1980’s) to more exotic forestry in a response to the level of erosion in the catchment.

The Upper Hutt site is located on the eastern side of the Hutt River, within Savage Park. This site was established in late 2005 and replaces a previous site at Trentham. The air quality indicators measured at this site are PM10 and nitrogen dioxide. PM2.5 was measured between 2021 and 2023. Carbon...

This hill country river is typically discoloured by sediment at low tide with improved water quality at high tide. The estuary is extensively used by visitors to the Urenui Beach settlement.

The water quality site on Waahi Stream (Huntly) is located just above the confluence with the Waikato River, upstream of the Harris Street Bridge. Waahi Stream is fed from Lake Waahi about 2km upstream of the confluence. The stream bed is soft-bottomed, consisting primarily of mud and silt at this l...

The water quality site located on the Waerenga Stream is accessed via Taniwha Road. Samples are taken from the road culvert near Riddell Road. The culvert provides some shade to the site but generally upstream there is a sparse riparian cover of native trees and willows. The water is generally clear...

Lower catchment site positioned to provide water quality information below the confluence of the north and south branches. Water quality is good with slightly elevated nitrate concentrations. The river supports a significant range of indigenous fish species, including some rare species. Minimum Flow...

This is a lower catchment site in the South Branch of the Waianakarua River. Water quality is good. The river supports a significant range of indigenous fish species, including some rare species.

The Waianiwaniwa River is a hill fed tribtuary of the Selwyn River/Waikirikiri.