Water is undoubtedly the world's most precious resource. Yet, it is becoming increasingly scarce. Fresh water is actually a renewable resource, yet the world's availability of clean, fresh water is steadily decreasing. Though we appear to possess an enormous water supply, ninety-seven percent of the almost 1.5 billion cubic kilometres of water on earth is sea-water. 2.7 percent of the remaining 3 percent will be permanently bound up in ice at the two poles. That will mean no more than point three of a percent of the world's water resources are useful as fresh water. This kind of available water moves in a permanent cycle via evaporation and rain fall. There are additional concerns about the quality of drinking water as rising water pollution brought about by nitrates, phosphates, pesticides and other chemical compounds is making purification increasingly complicated and costly. The need for water already is much greater than supplies in numerous areas of the world and as the world's population carries on growing, so also does the need for water. Awareness of the worldwide relevance of preserving water for ecosystem services has only recently come about. Throughout the twentieth century, more than half the world's wetlands have already been lost coupled with their invaluable ecological services. Freshwater ecosystems, with their unique bio-diversity, are now declining more rapidly than sea or land ecosystems. Saving water and making most beneficial use of it is now a priority for people around the earth. Fortunately, we have all become more interested in rainwater harvesting.

Even prior to the Roman era, the principle of harvesting rainwater and keeping it for later use is extensively recorded and occurred throughout the globe on all the major continents. In industrialized countries, until fairly recently, the practice of rainwater harvesting had mostly ceased because of the introduction of dependable water from the mains.. With the ever-growing demand for water (and resultant spikes in cost), and the recognised adverse influences this may have on localized environments, the demand for rainwater recycling systems is on the increase. Around the world water conservation systems are being utilised and engineered to overcome water provision issues. There are distinct water demand, supply and disposal challenges confronting water companies, developers and home-owners. Rainwater Harvesting could be used to help ease these challenges. Surface water, that is a large body of unwanted water to be drained away quickly, is already resulting in flooding of unprecedented levels in many parts of the world, not before witnessed. A little known fact is that for every ten percent of an area that is built on, surface water run-off rises by 50%. That is why making provision to collect and use significant quantities of water every day on innovative developments would render storm water beneficial instead of troublesome.. As yet, in many countries, this market is yet to be developed. In the interim, house holders can certainly do much to limit water use and can also collect rainwater on a limited but nonetheless worthwhile scale.

It is thought that 8% of global water use is for household requirements. These requirements comprise drinking water, bathing, food preparation, sanitation, and for watering gardens.. General family water requirements have been determined at around 50 litres per person per day, not including water for gardening purposes. Drinking water is water that is of sufficiently high quality so that it can be drank or used without the threat of immediate or lasting harm. This water is usuallly termed 'potable' water. In nearly all developed countries, the water made available to homes, business and industry is all of drinking water standard even though just a modest quantity is in actual fact consumed or used in food preparation.

Here are a few ideas to enable you to save water: install a water displacement gizmo into your toilet cistern (a brick or filled milk carton will do!) and if replacing old toilets be sure that your new one is water efficient. Don't forget to mend leaking taps and lag external pipes to avoid bursts and leakages. Get under the shower rather than soaking in a bath. Do not keep the tap running while you are brushing your teeth. While in the garden work with a watering can and not a hose pipe and don't be tempted to use a sprinkler. Water plants early in the morning or late at night to avoid water loss by way of evaporation and in summer let lawns grow longer because longer grass retains moisture content far better, don't fret if it seems brown, grass will re-grow as soon as favourable growing conditions return, as without a doubt is the case with most plants. Employ a little benign neglect in the garden and don't water too frequently, bushes and perenials will put down deeper roots and be stronger plants if you allow them look after themselves. Use greywater (e.g. washing up water) to water inedible plants. And get a rainwater tank, the bigger the better!

A barrel of water won't go very far in a dry spring when you are trying to establish seedlings. Getting your hands on a larger rainwater tank is a smart investment if you have got the space. You should not forget when selecting rainwater tanks that you may need a diverter kit, find models that have diverters incorporated in the price tag. Diverter kits will send water to your rainwater tank, but when the tank is completely full the water will be redirected back down the drainpipe and into drains. Taps are yet another option to consider,very practical without a doubt, but don't forget to take note of the location of taps - do you have to bend down too far, can you position a watering can below? Filters are yet another neat feature to look out for and can be fitted to gutters and drainpipes to protect against debris, for instance leaf mould, from polluting your water supply and encouraging the formation of algae. Position water butts and rainwater tanks in different areas of the garden. It is always useful if you can locate them near to those places that require additional watering, such as the veggie patch. As you can imagine more substantial rainwater tanks should be positioned by drainpipes that collect water from the largest roof surface area. You may well discover smaller butts are more appropriate for garden storage sheds and outbuildings. Happy harvesting and don't forget every droplet matters!