The time has come, in my humble opinion, for local authorities to demand that new houses have rainwater tanks installed.
All communities face problems with water. Many can simply not get sufficient supplies of good water and others have very real problems getting rid of storm water. Rainwater tanks attached to houses would help solve both those problems.
In terms of supply, rainwater could be stored in the household tanks and even if it was only used for watering the garden or washing the car, it would take the pressure of the reticulated supply.
The benefits to storm water disposal could also be significant. Over 80% of Napier’s storm water is pumped so any help would be welcomed.
Back in the days when all our sections were the good old fashioned quarter acre, we used to cover about 30 to 40% of our land with hard surfaces – house, shed, driveway, and paths – those sorts of things. When it rained much of the water simply soaked into the lawn or the garden.
Now we live on tiny sections with 70 or 80% of the land covered with hard surfaces. There is simply not sufficient uncovered land to allow the water to soak in on our sections and so it pours out into the street and has to be dealt with by the council.
Why don’t we store some of that water in tanks?
There is no problem in the new suburbs like Knightsbridge and Parklands because their drainage is designed to cope – but the water still ends up having to be pumped and why waste it anyway.
The biggest problem lies in suburbs that are heavily infilled – where two or three dwellings now cover what was originally someone’s grassy backyard.
Sooner or later we are going to have to deal with the major storm water problems that many councils face.
Why don’t we start now by insisting all new dwellings include rainwater tanks?
It can’t do any harm.
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