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The Masterton East air quality site was located in grounds of Chanel College on Herbert Street. The site was established in 2013 to complement the long term monitoring site at Masterton West, which has operated since late 2002. The site was decommissioned at the beginning of 2023. The air quality in...

The water quality and water level site located on the Matahuru Stream at Waiterimu Road is sampled below the confluence with a tributary that enters upstream of the bridge. The stream bed is soft bottomed consisting primarily of silt at this location. The road bridge provides the only shade to this...

The Matakana River site is located just upstream of Matakana Village, approximately 2km from the East coast. The channel is within a small gully, partially shaded by exotic trees, and has an upstream catchment area of 1,388ha. This is a paired water quality and ecology monitoring site.

The Matakitaki is a major tributary of the Buller River. This river is popular for whitewater kayaking and trout fishing. Large on-going slips in the Glenroy River deliver a considerable load of sediment to the Matakitaki River. Sampling programme change: Beginning July 2016, Tasman District Counci...

The Mataura River catchment is the region’s second largest. It extends from the southern tip of Lake Wakatipu to the Toetoes Estuary, east of Invercargill. The Waikaia River is the main tributary, contributing half the flow of the catchment above its confluence with the Mataura, east of Riversdale.

Mataura River at Mataura Island Bridge- Located within the Lower Mataura catchment, this monitoring site  has a wide, gravel bed with willow-lined banks. Macroinvertebrate samples are collected here annually by both Environment Southland and NIWA and river water quality samples monthly by Environmen...

Mataura River at Parawa – Located within the Upper Mataura catchment, adjacent to pastoral farming this section of river has a cobble/gravel bed. This site was monitored by NIWA up until January 2016 and is one of the original National River Water Quality Network (NRWQN) sites dating back to 1989. I...

This site is monitored by NIWA and is one of the original National River Water Quality Network (NRWQN) sites dating back to 1989. A range of water quality and flow instrumentations is tested at this site.

The Matukituki River rises in Mount Aspiring National park and flows for 30 kilometres into the southwestern edge of Lake Wanaka at West Wanaka bridge. It has a catchment area of 800 km2.   The immediate catchment is a cool forest scrub comprising of bracken and beech forest, and pastureland for gra...

The Mill Creek is a spring fed stream on the southern side of the Wairau River. Nearly no native vegetation remains in the catchment and water quality is impacted by pastoral land use. The sampling  site is located on private property and not accessible to the public.

The water quality site located on the Mokaurarua Stream (Puketotara) is accessed upstream of the Ormsby Road bridge. The upper catchment starts in native bush in Pirongia Forest Park flowing through exotic plantation and agricultural land to the monitoring site.

The Mohaka is one of the largest catchments in the region, draining 2,400 km2. The river’s headwaters extend to the Volcanic Plateau near Taupō.