Water is essential for cooking, cleaning and staying healthy — but it’s also a limited resource, and many households waste far more than they realize. The good news is that reducing water use doesn’t require perfection or expensive renovations. A few targeted changes (and one quick leak check) can deliver meaningful savings on both water and energy bills.
This guide focuses on the actions that usually make the biggest difference first, then moves room-by-room for practical, repeatable habits. Start with the top three and you’ll likely see the fastest results.
Start here: the biggest wins for most homes
- Find hidden leaks (especially toilets): a small leak can waste a surprising amount of water over time.
- Reduce hot-water flow (showers and taps): less hot water used also means less energy used.
- Stop “half-load” habits (dishwasher and laundry): full loads improve water efficiency per item cleaned.
- Fix outdoor watering (if you have a garden): timing, mulch and delivery method often matter more than frequency.
1) Turn off the tap when it’s not doing work
This sounds obvious, but it’s one of the easiest habits to tighten because it happens many times a day: brushing teeth, shaving, rinsing dishes, waiting for water to heat up, filling a jug. Build a simple trigger: “water on only when hands are under it.” If you share a home, agree on one visual reminder (a small note near the mirror or sink) for a week — long enough for the habit to stick.
2) Upgrade high-use fixtures with water ratings in mind
When you replace a showerhead, tap or toilet, you’re often locking in that water use for years. If you’re in Australia, the WELS water rating label makes it easier to compare water efficiency across many common household fixtures and appliances.
If you’re not replacing everything at once, prioritize what typically uses the most:
- Showers (especially hot water): improving shower flow rate can reduce both water and energy use.
- Toilets: older models can use much more water per flush than newer efficient toilets.
- Washing machines and dishwashers: newer efficient models can reduce water use substantially over the life of the appliance.
If you want a quick benchmark: many water-efficiency programs show that swapping an inefficient shower to a better-rated model can make a material difference to yearly household water use (and often energy use as well), especially in homes with multiple daily showers.
3) Do a 10-minute leak audit (the “toilet dye test” and meter check)
Leaks are the sneaky category: they can run 24/7 and you may not notice until a bill spikes or damage appears. The fastest checks:
Toilet dye test
- Remove the toilet tank lid.
- Add a few drops of food colouring to the tank water.
- Wait 10–15 minutes without flushing.
- If colour appears in the bowl, you likely have a leak (often a worn flapper or seal).
Flush immediately afterwards to avoid staining.
Water meter “quiet house” check
If you have a water meter, try this once:
- Turn off all taps and ensure no appliances are running (dishwasher, washing machine, irrigation).
- Check the meter and note the reading.
- Wait 15–30 minutes without using water, then check again.
If the meter changes, water is moving somewhere. Toilets are a common culprit, followed by dripping taps, irrigation valves, and hidden pipe leaks. If you notice musty odours, unexplained damp patches, or persistent running-water sounds, consider calling a licensed plumber.
4) Rethink food prep and “virtual water” without getting extreme
Household water use isn’t only about taps and showers. Food choices and cooking habits can influence water demand too — both directly (kitchen water use) and indirectly (the water footprint of food).
- Thaw food safely without running water: thaw meat overnight in the fridge, or use a bowl of cold water and change it periodically for faster thawing.
- Wash produce in a bowl rather than under a constantly running tap.
- Cook with intention: batch cooking reduces repeated rinsing and cleanup, and can reduce overall kitchen water use.
You don’t need to micromanage every meal. Focus on the habits that feel easiest and repeatable. Over time, small kitchen shifts stack up.
5) Cook in batches to reduce repeated cleanup
Batch cooking saves time and can reduce water use by cutting down on repeated rinsing, dishwashing, and “start over” prep. For example, cooking several portions of rice or grains at once can reduce how often you rinse cookware and run water for cleanup. Store portions in the fridge or freezer and reheat as needed.
6) Wash dishes with a “basin mindset”
Dishwashing is an easy place to waste water because it happens frequently and often without much attention.
- Dishwasher: run full loads. If your dishwasher has an eco cycle, it’s often designed to use less water and energy.
- Hand washing: plug the sink or use a tub/basin so you’re not rinsing under a continuous stream. Rinse quickly at the end if needed.
One practical rule: avoid “pre-rinsing by default.” Scrape food into compost or the bin, and let the dishwasher do the work unless you truly need a pre-rinse for stubborn residue.
7) Laundry: full loads, cold where possible, and fewer “just because” washes
Laundry efficiency is mostly about volume and frequency. Aim for full loads, and wash items when they’re truly dirty rather than on autopilot.
- Full loads: a half-load can still use a meaningful amount of water and energy per cycle, depending on your machine.
- Cold or cooler cycles: when appropriate, this reduces hot-water energy demand.
- Re-wear smartly: many garments can be worn multiple times between washes if they’re not soiled.
If you’re upgrading appliances in Australia, look for strong WELS ratings where available and compare water consumption figures — the difference can be significant over the life of the machine.
8) Use the right water level and settings
Some machines allow (or require) you to select a water level. If it’s set too high for the load, you’re paying for water you don’t need. If your machine offers eco settings, they’re often designed to reduce water use and lower temperatures. The cycle may take longer, but the savings can be worth it.
9) Reduce toilet water use in a way that won’t break your system
If you have an older toilet and can’t replace it yet, you can reduce the amount of water used per flush — but do it carefully.
A common approach is placing a weighted plastic bottle (or jug) in the toilet tank to displace some water. If you try this:
- Make sure it doesn’t interfere with the flush mechanism.
- Test for reliable flushing (a weak flush can lead to double-flushing, which defeats the purpose).
- Never use a brick (it can crumble and damage the tank components).
If you’re able to upgrade, a modern efficient toilet is typically a better long-term solution than tank hacks — especially if your current toilet is older or prone to leaks.
10) Shorten showers — and don’t assume baths save water
Showers are often a top driver of indoor water use, particularly because they use hot water. Two levers matter most: time and flow rate.
- Time: try a realistic goal (for many people, 5–8 minutes is a meaningful step down without feeling harsh).
- Flow: a more efficient showerhead can reduce litres per minute without turning showers into a miserable drizzle.
A quick note on baths: a bath can use more water than a short shower, depending on bath depth and your shower flow rate. If water-saving is the goal, it’s safer to focus on shorter showers and efficient showerheads rather than swapping showers for baths.
11) Water plants efficiently (and focus on soil, not just sprinklers)
Outdoor water use can be the largest category for many households with gardens. The goal is to deliver water to roots with minimal evaporation and runoff.
- Water early: watering in the morning generally reduces evaporation compared to the heat of the day.
- Mulch: it improves moisture retention and can reduce how often you need to water.
- Water the root zone: drip irrigation or targeted watering is often more efficient than broad sprinklers.
- Group plants by water needs: drought-tolerant plants should not be watered on the same schedule as thirsty ones.
If you want a deeper dive into water-wise gardens, you can explore practical strategies for conserving water while supporting wildlife.
12) Wash cars less often — and choose low-waste methods
Car washing is a category where convenience can lead to unnecessary water use. If your car isn’t visibly dirty or safety isn’t affected (windscreen and lights matter), stretching the time between washes can cut water use with minimal downside.
When you do wash at home:
- Use a hose nozzle with an automatic shut-off trigger.
- Consider the bucket-and-sponge approach for more control.
- Wash on a surface that won’t send soapy runoff into storm drains (local rules vary).
13) Reuse water safely (and keep it appropriate)
Reusing water can make sense when it’s done safely. A few low-effort options:
- Catch “warm-up” water: if you run the tap waiting for hot water, collect the initial cold water in a jug or bucket for plants or cleaning.
- Reuse cooking water thoughtfully: unsalted water from boiling vegetables or pasta can sometimes be used for plants after it cools (avoid salty or oily water).
You may also see people repurpose kitchen water for personal care. For example, some use water from rinsing rice as part of skincare routines. If you’re curious about that approach, this guide explains one method to ferment rice water for skin.
If you’re considering larger-scale reuse — such as greywater systems — it’s worth checking local regulations and system requirements. Done well, greywater reuse can materially reduce household demand on mains water.
14) Make it a household system, not a personal burden
Water savings are easiest to sustain when they’re shared and simple. Try one small “house rule” at a time:
- Run dishwashers and laundry only when full.
- Pick a shower time target everyone agrees is realistic.
- Do a monthly leak check (it takes minutes once you know the routine).
- Set a seasonal outdoor watering plan instead of daily guesswork.
Keep it positive. The goal is progress, not purity — and most households can reduce water use without losing comfort.
Small changes, big impact
Minimizing water use at home is one of those sustainability wins that’s both practical and meaningful. Fixing leaks, improving shower efficiency, running full loads, and watering gardens smarter can reduce waste without turning daily life into a chore. Start with the changes that feel easiest, lock them in, then add the next step when you’re ready.
Sources & Further Reading
- WELS water rating label (Australia)
- WELS examples of potential household water savings
- Your Home (Australia): reducing water use
- EPA WaterSense: fixing leaks and the toilet dye test
- Australian Government: water efficiency overview
- UC Agriculture and Natural Resources: irrigation and evaporation guidance
- OECD sustainability datasets and reports
- Safe thawing guidance
- Simple toilet and household water-saving tips
- Washing machine efficiency context