How much water does a dripping tap waste? Melbourne numbers
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A dripping tap that you've been ignoring is losing more than 10,000 litres of water every year.
That is not an approximation designed to alarm you. It is the measured output of a tap dripping at one drop per second — a rate slower than most people would notice without listening carefully. The actual waste from a visible, audible drip is often higher.
Melbourne's water storages ended 2025 at 11.2% below the previous year. Permanent Water Saving Rules are already in force across Victoria. And in almost every street of almost every Melbourne suburb, taps are dripping quietly into drains.
This article gives you the exact numbers: how many litres per day, how much it adds to your water bill, and what the total cost looks like annually. The decision about what to do with those numbers is yours.
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A dripping tap wastes between 30 and 200 litres of water per day, depending on drip rate. At one drip per second — a common, easily audible rate — the daily waste is approximately 86 litres, and the annual total exceeds 10,000 litres. Faster drip rates reach 200 litres per day or more. Source: City of Melbourne Urban Water program. |
The variation matters. A slow, barely visible drip sits at the lower end. A tap that drips steadily enough to hear from across the room sits at the higher end. Most taps that people describe as dripping fall somewhere between 60 and 150 litres per day.
A standard Melbourne bathtub holds approximately 150–200 litres. A dripping tap at the higher end of the range wastes the equivalent of a full bathtub every single day. At the lower end, it wastes the equivalent of around 30 standard glasses of drinking water per day, from a tap that is supposed to be completely closed.
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Drip rate |
Daily waste |
Annual waste |
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30 L/day (slow drip) |
30 litres |
~10,950 litres |
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86 L/day (1 drip/sec) |
86 litres |
~31,390 litres |
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200 L/day (fast drip) |
200 litres |
~73,000 litres |
These figures come from the City of Melbourne Urban Water program's household leak data. The 10,000+ litres per year figure referenced in most guides is the conservative end. Many Melbourne households with a slow, ignored drip are losing two to three times that amount annually.
Now — what does that cost?
Melbourne's water billing uses a tiered tariff structure. Most residential customers receive services through Yarra Valley Water or South East Water, depending on their location, with City West Water covering the inner suburbs.
At an audible drip rate of one drop per second (approximately 86 litres per day), the annual water waste equals approximately 31 kilolitres. At Yarra Valley Water's current Tier 1 rate of $2.28 per kilolitre, that adds approximately $72 per year to your water bill — purely from one dripping tap.
At 200 litres per day, the annual waste reaches approximately 73 kilolitres. Depending on your household's baseline usage and how that pushes you into higher tariff tiers, the annual cost attributable to the drip can reach $120–$170.
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Quarterly bill impact Divide the annual figures by four. A slow drip (86 L/day) adds approximately $18 to every quarterly bill. A fast drip (200 L/day) adds $30–$43. Over a full year, you have paid the equivalent of a professional tap repair two to four times over — without actually fixing the tap. Note: Melbourne water bills also include a sewerage charge calculated on water consumed. Every litre wasted through a dripping tap amplifies the total bill impact slightly. |
Melbourne's water storage situation in 2026 is materially worse than in recent years. According to Melbourne Water's Annual Water Outlook, the city's combined storage system ended 2025 at 11.2% below the same point the previous year. As of mid-2026, Melbourne Water is actively monitoring storage levels and has indicated that further conservation measures remain possible depending on seasonal rainfall.
Permanent Water Saving Rules are already in force across Victoria under water.vic.gov.au. These rules restrict specific outdoor water uses year-round — but they do not address the household plumbing leaks that collectively represent a significant component of urban water loss.
The City of Melbourne Urban Water program estimates that household plumbing leaks — including dripping taps, leaking toilets, and running toilets — account for approximately 10–12% of total residential water consumption in Melbourne. This is water households are paying for and Melbourne's storage system is supplying, without delivering any utility.
To put that in suburb-wide terms: one in ten Melbourne households with a tap dripping at 86 litres per day. That totals more than 86 million litres of wasted water daily across the city — from taps alone.
That is not meant as a guilt calculation. It is a scale figure. Individual action matters in a city-wide water shortage because the shortage is composed entirely of individual household decisions, multiplied across a million homes.
Fixing a dripping tap in Melbourne in 2026 is one of the highest-impact household water conservation actions available. It wastes less water, costs less money, and takes under an hour for most tap types. The numbers make the case without editorialising — but just in case they need one more frame:
The 30–200 litre range is wide. If you want your specific tap's waste figure, you can measure it in two minutes.
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Measure your tap's waste in 2 minutes What you need: a measuring jug and a timer. 1. Place the measuring jug under the tap. 2. Start a one-minute timer. 3. Read the volume collected in millilitres. 4. Multiply by 1,440 for daily waste in ml. Divide by 1,000 for litres. Example: 60ml per minute x 1,440 = 86,400ml = 86.4 litres per day. |
Multiply your daily figure by 365 for an annual volume, then divide by 1,000 to convert to kilolitres. Multiply the kilolitres by your current tariff rate for the annual dollar cost.
If you prefer an automated tool, the City of Melbourne's household water audit at melbourne.vic.gov.au can estimate water loss from common household leaks.
Yes. On every measure covered in this article.
The water loss is real and cumulative — tens of thousands of litres per year from a single tap. The financial cost is real — adding $72–$170 to your annual water bill, depending on drip rate. The civic cost is real — Melbourne's storage system is under meaningful pressure in 2026, and household leaks contribute materially to that pressure.
The cost to fix it:
In both scenarios, water bill savings recover the fix cost within one to two years for a moderate drip rate, and within the first billing quarter for a fast drip.
The one scenario where fixing is not straightforward: when a repair reveals a tap body fault requiring full replacement. Even then, a new tap pays for itself in water savings over its lifespan.
Book On Time Plumbing for a fixed-price dripping tap repair — same day availability in Melbourne.
Book a same-day tap repair or Call us today at 1300 110 428.
There are three common tap types in Melbourne homes — compression (traditional washer), mixer (cartridge), and ceramic disc (quarter-turn). The fix for each is different. Our complete guide to fixing a dripping tap in Melbourne covers all three in detail, including step-by-step instructions and how to identify which tap type you have.
For a licensed plumber to handle the repair, On Time Plumbing offers fixed-rate tap repairs across Melbourne with same-day availability during business hours. See our tap repairs and replacement page for the full service scope.
The repair is straightforward in both cases. The numbers you now have decide to act straightforward too.
You now have the exact numbers. A single dripping tap wastes between 10,000 and 73,000 litres of water per year. The annual water bill cost is $72–$170, depending on the drip rate and your water retailer. The fix costs between a few dollars in parts and a professional repair — and it typically pays for itself within one to two years.
The question of whether to fix it is no longer a matter of not knowing the numbers. You have the numbers. The tap is still dripping.
Between approximately 10,950 litres per year (at 30 litres per day) and 73,000 litres per year (at 200 litres per day). The most commonly cited figure — 10,000 litres per year — represents a slow, barely visible drip. An audible drip at one drop per second wastes closer to 31,000 litres per year.
Yes. Every litre wasted through a dripping tap is measured by your water meter and billed at your household's current tariff rate. At an audible drip rate of one drop per second, the annual water waste is approximately 31 kilolitres — adding around $60–$80 to your annual water bill at current Melbourne tariff rates, depending on your water retailer and usage tier.
At one drip per second (approximately 86 litres per day), the daily water cost at Melbourne tariff rates is approximately $0.20 per day. At the higher rate of 200 litres per day, the daily cost is approximately $0.46. These figures are based on the Yarra Valley Water Tier 1 rate of $2.28/kL — households in higher usage tiers incur a slightly higher per-litre cost.
Yes, on both financial and conservation grounds. The annual water bill savings from fixing a moderate drip typically cover the cost of a professional repair within one to two years, and a DIY repair within the first quarterly billing period. For Melbourne households in 2026, the additional civic context is meaningful: the city's water storages are under real pressure, and household leak repairs are among the most direct conservation actions available to individual homeowners.
Fixed price. Same-day availability. No call-out fee during business hours.
Book a tap repair or Call us today at 1300 110 428.
Disclaimer: Water waste estimates are based on published City of Melbourne Urban Water data and may vary from the actual drip rate. Water tariff calculations use published rates and are approximate — actual bill impact depends on household usage tier, water retailer, and whether usage pushes the household into a higher tariff tier. Tariff rates are subject to change — confirm current rates with your water retailer.
