How many baths could you fill from one rainstorm?

Many people like to quantify the benefits of rainwater harvesting and rainwater tanks by using everyday examples such as how many baths they could get from a rain event. The basic calculations below may be surprising to some but even a light rain and average sized roof can yield large quantities of water. This is why we recommend installing water tanks of larger capacity if space and budget allows.

rain water bath
In other words, when you have a big storm over your house, just how much rain are you getting? Let’s say your house sits on a one-half acre lot. And let’s say you get a storm that drops 1 inch (25mm) of rain. You’ve just received 13,577 gallons (51400 litres) of water on your yard. A big bath holds about 40 gallons (150 litres) of water, so if you could save that inch of water that fell you could take a daily bath for 339 days!

In this era of water conservation, many homeowners are putting “rain barrels” or small rain water tanks or drums around their homes to collect rainfall runoff. Essentially, this is just a large bucket to collects water coming off of the roof and down the gutters and downspouts. The water is then used to water gardens and plants. Can you get enough water out of the gutter to make it worthwhile? The answer is definitely “yes”. A typical outdoor trash can holds 32 gallons (120 litres). If you capture the rainfall runoff from a storm that just produces 1/10th of an inch of rain onto a 20 by 30 foot roof, you end up with a full 32-gallon container full of water, with 5 gallons left over.

Source: USGS

If you are based in South Africa, click on the links below to view the wide range of JoJo water tanks, tank stands, septic tanks, chemical tanks and other high quality JoJo Tanks products available.

JoJo Tanks South Africa offer a wide range of products such as plastic water tanks and chemical tanks to suit every household, business or agricultural need, including silo tanks and silo tank stands as well as other high quality JoJo Tanks products.  See JoJo Tanks’ VERTICAL TANKS, HORIZONTAL TANKS (transporter tanks), STEEL TANK STANDS and OTHER JOJO PRODUCTS and see JoJo Tanks’ NEW 6000 LITRE UNDERGROUND TANKSAlso see our FAQ and WATER TANK PRICES.

JoJo’s superior polyethylene plastic water tanks and steel water tank stands make JoJo Tanks the leaders in plastic water tank technology and the quality, affordability and 5-year guarantee on these water tanks make JoJo products one of the best choices in South Africa.  *All JoJo Tanks polyethylene tanks and products now carry a 8 year warranty (on tanks purchased on or after 1 July 2013)*  JoJo’s water tanks and chemical tanks come standard with a number of features that are often lacking on cheaper/inferior plastic tanks made by other companies in South Africa.

We are authorised JoJo Tanks dealers in South Africa and dispatch orders directly from JoJo Tank depots to save on transport costs. Full range of JoJo Tanks products and JoJo water tanks for sale.  CONTACT US for a quote on the right JoJo water tank or other JoJo product for you.  Special discounts are available on multiple orders of chemical tanks and water tanks and to our commercial and government customers. We can usually delivery tanks and tank stands free of charge to business/commercial addresses in South Africa.


(15000 litre and 20000 litre JoJo vertical water tanks & chemical tanks are available on order directly from JoJo Tanks’ main factory)

Live in the USA and need rainwater harvesting equipment?  Click HERE!


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