Our region has more than 100 lakes, over 20 rivers, about 1,400 streams and many underground aquifers. We've also got the country's longest river and largest lake.
It's easy to wonder why we need to conserve water.
But they all need to provide fresh water for agriculture, industry, power generation and, of course, water for use at home.
And our recent summer droughts are a strong reminder that we can’t take our freshwater resources for granted.
Our rivers and streams suffer
Our groundwater is affected
While municipal water returned to the river is treated to a high standard, water from a number of other sources remains a problem. These include run-off in urban areas (oil on roads, for example) and from rural and forestry land. Maintaining high water levels and volumes helps dilute the contaminant load entering the water bodies and assists in maintaining water quality.
So, small efforts around the home and at work to conserve water all add up. If we all do our part, it makes a difference.
There are many ways we can conserve water during the summer months. Read on to find out how!
Underground water lines on residential properties are subject to breaks and leakage. Whether you’re on a large property in the country or a section in town, a leaking water line can lose a massive amount of water if it’s not repaired promptly.
The chart to the right shows just how much water can be lost – about 14,000 litres a day, for example, through a hole the size of a small nail.
With a water meter, it’s easy to do an overnight check for problems. Just read the meter before going to bed, then first thing in the morning. The difference should be minimal.
Watching for leaks if you don’t have a meter is a little trickier. To do it, follow these tips:
Small leaks lead to big water losses very quickly! So keeping an eye out – and that ear to the ground – can make a real difference.
We drink it, cook with it, shower under it, or bathe in it. We use it to wash our dishes, clothes and cars. We might even put it on lawns and gardens to keep them healthy and green. Access to fresh, clean and plentiful drinking water is a cornerstone of modern society!
If you’re on town supply, it’s easy to take water for granted. But it’s no easy task to withdraw it from a source, treat, and deliver it to you the customer. And it’s expensive. Costs for water treatment and supply along with wastewater treatment are significant. This is all in order to meet resource consent requirements and public health standards.
Highly-skilled council staff manage and operate treatment plants, storage reservoirs and distribution pipelines (networks), so when you turn on the tap the water’s there.
From source to tap1:
For groundwater, the process is much simpler. Screening is done by the soil as water travels to the extraction point and disinfection is usually the only treatment required.
Councils spend money on plant maintenance, chemicals for treatment, and energy if pumping is required – such as delivering it to higher areas. Every effort you make to conserve water will help control these costs.
So where does the water go once we’ve used it and it disappears down the plughole?2
When we flush our toilets, drain our baths, showers and sinks, and use the dishwasher or washing machine, the wastewater is carried through a network of pipes to a treatment plant. This is good service for town and city residents! (If you’re on rural property, used water goes to either a septic tank or drainage field.)
The contaminated wastewater (also called sewage) will contain a small amount of solids, including dissolved detergents and chemicals, food scraps, human waste and other small bits of rubbish. It also includes bacteria and viruses that can make people ill.
Councils treat wastewater, first by screening out any solids, then treating it to a level that meets requirements of the discharge consent. Chemicals and energy are used in the process, so any water we conserve at home or work will reduce wastewater flows and save money.
Over the next few months, more information about Smart Water Use will be available here, including household water saving tips, and details about upcoming public workshops. Contact us(external link) for more information.
Download some tips for smart water use at home below.
See if you can save water, power and money with this quick and easy smart water use check up document.
Smart water use at home
(247 kb, 35 seconds to download, 56k modem)