Waingaro River (Waikato) facts for kids

Quick facts for kids Waingaro River
Waingaro Landing and mangroves at mouth of Waingaro River
Country	New Zealand
Physical characteristics
Main source	150 m (490 ft)
River mouth	Raglan Harbour 0 m (0 ft)
Length	18 km (11 mi)
Basin features
Basin size	123 km2 (47 sq mi)

The Waingaro River is a river of the Waikato region of New Zealand's North Island. It flows generally southwest from its origins near Glen Afton and Glen Massey, west of Ngāruawāhia, to reach a northern arm of Raglan Harbour (see 1:50,000 map). Its main tributary is Kahuhuru Stream, which Highway 22 follows for several kilometres. Tributaries total about 170 kilometres (110 mi). At Waingaro it is fed by a hot spring.

Geology

Waingaro River and hot water pump station - the pool was north of the road, but water is now pumped under the road.

The lower river flows over Puaroan age (about 150 million years ago), blue-grey Puti siltstone.

Pollution

The Waingaro River is one of the largest sources of sediment in Whaingaroa Harbour, partly because it is 99 percent unfenced.

Pollution has been worsening for phosphorus, though nitrogen has improved, as shown in this table of important (i.e. slope direction probability over 95% and RSKSE over ±1% pa) improvements, or deteriorations (-) in relative seasonal Kendall slope estimator (RSKSE) trends (monthly records are flow-adjusted using a Lowess curve fit with 30% span.) - Turbidity is also poor.