Freshwater is one of New Zealand's key strategic assets.
It is why we are so good at growing food. It is pivotal to our clean green tourism brand. It is part of what makes for our great Kiwi lifestyle.
The management of water has historically been left to councils with little direction or monitoring from Government. We started changing that in 2009 when we required councils to progressively meter water takes.
You cannot manage what you don't measure. We introduced the first National Policy Statement on Freshwater in 2011 that requires councils to set minimum flows in our rivers. In 2014 we added requirements for councils to limit pollutants.
We also passed a new Environmental Reporting Act in 2015 so there is open, independent reporting on the state of our waterways.
We are currently consulting on the next steps. This includes a plan to achieve 90 per cent of our rivers and lakes being swimmable by 2040, a national regulation requiring stock to be excluded from waterways, tougher requirements for limiting nutrients and a further $100 million to help fund clean-up initiatives.
A credible national plan for improving water quality for swimming requires a consistent grading system so we can set clear targets and monitor progress. This is difficult because even our cleanest rivers can become badly polluted during heavy rainfall.
Water quality scientists from NIWA have developed a system that applies five colour grades based on the proportion of time a river meets swimming water quality standards, ranging from blue (excellent; suitable for swimming >95 per cent of the time), green (good; 90-95 per cent), yellow (fair; 80-90 per cent), orange (intermittent; 70-80 per cent) and red (poor; <70 per cent).