Stormwater is the water that runs off surfaces such as houses, roads, carparks, driveways, and footpaths. In urban areas, it runs down drains into stormwater pipes or channels and is carried to rivers, lakes or the sea.
In most areas of New Zealand, stormwater is not treated before it is discharged. This means there are several reasons to be concerned about the way stormwater is managed.
Stormwater isn’t pure water. Along the way to its outfall it picks up rubbish, oil, sediment, animal droppings, chemicals, plant nutrients and other contaminants from roads and other paved areas. It can also be contaminated with paint, detergents and anything else people tip down stormwater drains.
Our solution Intewa DRAINMAXstores stormwater in revolutionary tunnels underground, then slowly infiltrates the water back into the soil.