When I was a child, swimming in rivers and lakes was one of the best parts of summer. We'd hike for hours on school trips to reach the perfect swimming spot, then wade in squealing, feeling the muddy sand squish between our toes. As we dove deep into the chilly depths, the biggest concern we had to contend with was a stray eel, a bit of weed or, if our feet settled on the wrong rock, perhaps an irritated koura. Nowadays the water alone could land you in hospital.
There's something in the water: dung and urine. And lots of other rubbish. But agricultural waste accounts for a significant portion of our aquatic woes. The fact is indisputable, although there are plenty of powerful organisations and individuals that try, repeatedly, to dispute it. Agriculture is big business in New Zealand. And if there's one thing that big business hates, it's admitting culpability.
But here's the reality: In our little land of plenty, we have many more cows than our environment can cope with. We have one of the most beautiful environments on earth, but it's fast becoming overwhelmed by the waste - in the form of both excrement and nutrients - generated largely by one of our major economic powerhouses; the dairy industry.
On top of that, we've cut most of our forests down for farming, which has led to sediment being swept into our waterways, and we're drawing arguably unsustainable quantities of water from some waterways to irrigate farms. Then there's the fact that some commercial enterprises are pouring pollution into our rivers, with the blessing of the RMA. And the less than 1 per cent of our waterways that are in urban centres aren't exactly pristine either.
The net result of these factors is that many of our waterways are in a dire state, and it's not just our summer swimming practices (and our valuable "clean, green" image) that are at risk. Whole ecosystems are being threatened and some drinking systems are at risk of contamination. In short, we have a major problem on our hands, and it's going to cost a lot of money to fix it.