Tēnā koutou. This year more than ever, it’s fitting to take stock of Taranaki’s progress in improving the health of our rivers and streams, and discuss where we need to go from here.
As a region and as a nation, we’re at a turning point in the way we manage our precious freshwater resource. We’re embarking on a new journey and everyone should be on board.
River ecology trends 1995-2019
44% Improvement | 45% No obvious trends | 2% Deterioration
The ecological health of waterways is assessed by studying the small critters and organisms in streams and rivers, and is the primary measure of freshwater quality. Across the region, almost all our rivers and streams are improving or not showing any significant changes. At many sites, we’re seeing the best results since monitoring began in 1995.
Physical & chemical trends 2012-2019
11% Improvement | 74% No obvious trends | 15% Deterioration
Measuring organic contamination, nutrient concentrations and aesthetic quality can flag pressures on waterways and indicate where to best focus our attention. The picture in Taranaki is largely stable but our aim is to achieve more improvements and fewer declines. More sites are showing improvement, particularly in nutrient concentrations.
Freshwater physicochemical monitoring 2018-2019 [PDF, 2.8 MB]
Algae growth 2018-2020
84% Surveys met guidelines | 16% Surveys exceeded guidelines
Algae, or periphyton, is essential for aquatic ecosystems but excessive levels can cause environmental and/or health problems. Just about all of Taranaki’s 21 monitored sites meet national guidelines all the time.
National standards 2016-2019
The Government has set compulsory standards for a number of water-quality measures year round. All the toxicant measurements at 15 Taranaki sites meet ecological standards, with more than two-thirds achieving the best score.
Freshwater physicochemical monitoring 2018-2019 [PDF, 2.8 MB]
Note: ecological and human health measures are based on attribute states detailed in the 2017 amendment to 2014 National Policy Statement for Freshwater Management (NPS-FM) and were current for the period of analysis. The NPS-FM has undergone further amendments as of August 2020 and some of the measures have since been modified.
Sampled all year in all flow conditions.
Many of the sites are too shallow, cold and/or small for recreational bathing activities.
Can I swim?
Over summer, the Council monitors popular swimming spots on the coast (where most people swim) and at our rivers and streams. In general, most freshwater sites show water quality is acceptable for recreational bathing activities like swimming. The majority of unacceptable samples were detected at three sites, near the mouths of the Waiwhakaiho River, and the Te Hēnui and Waimōku streams. Contamination at these sites is most likely from wild populations of water fowl, gulls and pigeons. Coastal sites were consistently acceptable, with all sites meeting the recreational guidelines.
Note: only 11 of the planned 13 surveys were successfully completed over the 2019/2020 summer sampling period. Due to the Covid-19 pandemic and the nationwide lockdown between 25 March and 27 April 2020, the final two scheduled sampling surveys could not be carried out.
