The number that appears on your water bill every month
Have you ever stopped to calculate how much time you spend in the shower? Ten minutes may seem short, but a common electric shower uses between 100 and 200 liters per bath, depending on the equipment’s flow rate. According to data from the National Sanitation Information System (SNIS), the average Brazilian consumes about 154 liters of water per person per day, and showering accounts for a significant share of that total. This means the bathroom is one of the places in your home with the greatest potential for water savings, without you having to give up anything that really matters.
The good news is that reducing water consumption in the shower doesn’t require sacrifice, coldness, or discomfort. With a few simple behavioral adjustments and, when possible, one or two equipment changes, it’s possible to cut water consumption and still feel like the shower was better than before. By the end of this text, you’ll have a concrete plan to start today.
Why the shower matters so much in your water bill and to the planet
Brazil is a country privileged with water resources, but this doesn’t mean water is guaranteed forever or that wasting it has no cost. According to the IBGE, regions like the Northeast and parts of the Center-West already face structural water scarcity. Even in São Paulo, a city with relatively stable access, the water supply crisis of 2014 and 2015 showed how the situation can change rapidly.
From a financial perspective, your water bill goes up as you enter the consumption brackets of utility companies. Sabesp, for example, uses a progressive tariff system: the more you consume, the higher the cost per cubic meter. Reducing shower consumption can keep you in a cheaper bracket and generate real savings on your bill every month.
There’s also the cost of electricity. The electric shower is one of Brazil’s biggest culprits on the electric bill, according to ANEEL data. Shorter showers or using a lower-power shower head mean fewer kilowatts consumed, and this appears directly in the amount you pay.
How much time and liters you really use
Before changing anything, it’s worth understanding your starting point. Most people underestimate their own shower time. A simple way to measure: set a timer on your cell phone before entering the shower and see the result without putting pressure on yourself.
To calculate water consumption, you need to know the flow rate of your shower. Most residential electric showers have a flow rate between 5 and 8 liters per minute. If your shower lasts 10 minutes with a 6-liter-per-minute shower head, you’re using 60 liters. If it lasts 15 minutes, that’s already 90 liters, for just one person.
In a family of four people with this profile, shower consumption alone can exceed 10,000 liters per month. Reducing five minutes per person per day, in this scenario, saves around 3,600 liters monthly. It’s not an abstraction: it’s real water that no longer needs to be captured, treated, and disposed of.
Behavioral changes that actually work
The fastest way to save doesn’t require spending a dime. It depends only on habit. Some changes seem obvious, but the difference lies in how to implement them without seeming like punishment.
Closing the tap while applying shampoo or soap is the measure with the greatest immediate impact. The shower can stay on to warm up at the beginning, but during the minutes when you’re scrubbing your hair or body, the water running down the drain is pure waste. Testing this for a week already shows results on your next bill.
Another effective change is adjusting the temperature with the tap, not with time. Many people leave the shower running waiting for the water to heat to the ideal point, when they could simply regulate the power. In electric models, using the “summer” position consumes less energy and maintains a comfortable temperature for most of the year in Brazil.
List of habits that make a difference at no cost:
- Timing your showers for a week to create real awareness of the duration
- Closing the tap while applying soap, shampoo, and conditioner
- Using the lowest power setting on the electric shower when weather permits
- Avoiding unnecessarily long showers during peak hours (usually between 6 PM and 9 PM), which also helps reduce the load on the electrical grid
- Working with whoever lives with you to create a shared routine
Equipment that helps save without sacrificing comfort
If you want to go beyond behavior and invest in some equipment, the options are more affordable than they seem. The item with the best cost-benefit is the aerator or flow reducer, a small device that is attached to the shower tap or water outlet and can reduce flow by half without you feeling a difference in perceived pressure, because it mixes air with water.
| Equipment | Estimated average cost | Consumption reduction |
|---|---|---|
| Aerator/flow reducer | $4 to $12 USD (R$ 20 to R$ 60) | 30% to 50% |
| Shower timer | $6 to $16 USD (R$ 30 to R$ 80) | Depends on habit |
| Low-flow shower head | $30 to $80 USD (R$ 150 to R$ 400) | Up to 40% |
| Solar water heater (to replace electric) | $400 to $1,200 USD (R$ 2.000 to R$ 6.000) | Up to 90% in energy |
The shower timer is a good choice for those with children or those who know they easily lose track of time. It counts down and emits a signal when the set time ends. It’s an objective and conflict-free way to create a limit.
For those who own their home and think medium-term, the solar water heater is the investment with the highest return. According to ANEEL, the electric shower can represent up to 25% of the energy bill in residences. A solar system reduces this dependency significantly. There are specific financing lines for this in some states.
If you’re starting to structure broader changes at home, the sustainable checklist for beginners: where to start can help you organize priorities by impact and cost.
Common mistakes that sabotage savings
Some savings attempts don’t work because they start from the wrong premises. The most common is believing that taking a cold shower solves everything. In practice, a cold shower that causes discomfort tends to be quicker, yes, but it also generates resistance and abandonment of the practice within days. The idea is not to suffer, but to create a sustainable routine.
Another mistake is focusing only on duration and ignoring flow rate. An 8-minute shower with a high-pressure shower and a flow rate of 12 liters per minute uses 96 liters. The same time with a 5-liter-per-minute shower head results in 40 liters. The difference is huge, but comfort can be practically the same.
It’s also common to install a flow reducer and then compensate by opening the tap more to feel more pressure, which negates the effect. The trick is to give yourself a few days for your body to adapt to the new pressure before judging whether it worked.
How to build your savings plan in three steps
You don’t need to do everything at once. A simple and progressive plan tends to work better than a radical change that lasts a week.
- Week 1: Measure. Time your showers for seven consecutive days. Note the average time. That’s your starting point.
- Week 2: Adjust behavior. Start closing the tap while applying shampoo and soap. If the average time is longer than 10 minutes, try reducing it to 8. Do this without rushing, just creating awareness.
- Month 2 onwards: Evaluate equipment. If behavior has already changed and you want to take another step, research flow reducers compatible with your shower. Many cost less than $10 USD and pay for themselves in one or two months of water savings.
Frequently asked questions about water savings in the shower
Doesn’t closing the tap during the shower make the water cool down?
In electric showers, water heats up the moment it passes through the heating element, so closing and opening the tap doesn’t compromise temperature. In gas or solar heating systems, there may be a small variation, but it tends to be smaller than most people imagine in practice.
Does a flow reducer work on any shower?
Most models available on the market are compatible with the most common national shower fittings, but it’s worth checking the outlet diameter before buying. Many building material stores and even larger supermarkets already have these accessories available, and the salesperson can help you choose the right one.
Is it worth replacing an electric shower with a solar water heater in an apartment?
In apartments, installing a solar water heater depends on the building’s structure and condo board approval. There are compact systems without the need for an external tank, but you should consult a professional before investing. In houses, feasibility is usually much greater.
What’s the best time to shower thinking about energy consumption?
According to ANEEL guidelines, avoiding electric showers between 6 PM and 9 PM helps reduce demand on the grid during peak hours. Additionally, some tariffs, such as white tariffs, charge more for energy consumed during this interval, so adjusting your shower time can generate direct savings.
Start with a timer, today
The simplest change you can make now costs nothing and requires no purchases: activate your cell phone’s timer before entering the shower tomorrow morning. That’s it. Seeing the real number already changes your perception, and perception is the first step to any new habit.
Saving water in the shower isn’t about deprivation. It’s about using well what you have, paying less at the end of the month, and contributing so that this resource remains available to everyone. A small action, repeated every day, accumulates a result that appears both on the planet and in your wallet.
