We have summarised the main concerns of our clients on drinking water and sanitation services

Would you like to know the procedure for contracting the water service? How can I arrange automatic billing? What is your timetable and what is the number to call to ask about my contract or service? What is the water hardness of my house, or what checks are carried out to ensure the quality of the drinking water? How I can save water? What is being done to ensure the supply without service restrictions?

Here are all the questions and answers regarding the service we offer

How I can contract the water supply?
If you want to sign up for the supply of water you can do so via or virtual office or by calling our customer service telephone: 900 55 05 55. Want to know more?

How can I arrange automatic billing or change billing data?
If you want to change the billing data you can do in our online office or by calling our customer service telephone: 900 55 05 55 or by email info.ematsa@ematsa.cat

How can I arrange the payment of my bill?
If you have a document with an EMATSA barcode, you can go to the Post Office or Servicaixa terminals: http://portal.lacaixa.es/pagos/impuestosrecibosmatriculas_es.html to make the payment.

How I can change the name on my contract?

What data does my bill contain?

The water distributed in the municipalities managed by EMATSA far exceeds the strictest health standards set by the World Health Organization, the European Union and the health authorities of our country. So we can say tap water, trustworthy water.

What is drinking water?
As defined by the World Health Organization and the European Union, drinking water is that which a person can drink every day, during their lifespan without any risks to their health.

Can you drink tap water?
Undoubtedly. Tap water is drinkable, in other words, it is water that people can ingest without any risks to their health.

How is the composition of drinking water determined?

To set the quality of tap water, the European Union, following the recommendations of the World Health Organization, determines the boundaries of the presence of certain components in the water. Many of these do not damage the human body, some are indeed beneficial, and others, only if they are present in large quantities.

In order to define the levels for drinking, researchers base the daily intake of a person throughout his life – 2 litres daily for 70 years – with a very high safety margin.

How do you ensure the safety of the water that reaches households?
EMATSA continuously performs analysis to detect the presence of undesirable microorganisms and chemicals, and to control other properties such as odour, colour or taste. It analyses the presence of more than sixty microbiological parameters and chemical types, and testing for other characteristics such as smell, colour and taste.

We also continuously carry out analysis of residual chlorine in drinking water in different parts of the distribution network, to ensure the presence of a low dose of this disinfectant, as an additional health guarantee. 14,000 strains of the water supply a year are tested by EMATSA.

If my water looks, tastes or smells unpleasant, can it be drunk?
Drinking water fit for human consumption has salts and substances in its composition that give it a special taste and smell. Therefore, water which has a specific taste and odour must not be considered as an indicator of non-drinkable water. In fact, most of the components that cause the water to have an appearance, taste or unpleasant odour are not harmful to health.

However, should the case arise where suddenly the water is dirty, with an unpleasant taste or odour, we recommend that you contact our customer service.

What is chlorine?
Chlorine is the most commonly used water disinfectant in the world for its effectiveness and dependability to eliminate any harmful microbes that water supply pipes or storage tanks may contain. The chlorine added to drinking water for human consumption is a minimum health guarantee – set by law – which is not harmful to people’s health. Want to know more?

What is water hardness?
Hard water is one that contains high levels of minerals, particularly calcium and magnesium salts. Although other minerals such as strontium, iron and manganese, also contribute to the hardening of the water, they do so to a lesser extent, since they are generally dissolved in water in small amounts.

The hardness of the tap water poses no danger to human health, but the opposite: calcium and magnesium, which characterise the hardness of the water, are essential to health. Want to know more?

If my water looks, tastes or smells unpleasant, can it be drunk?
Drinking water fit for human consumption has salts and substances in its composition that give it a special taste and smell. Therefore, water which has a specific taste and odour must not be considered as an indicator of non-drinkable water.

To improve the taste and smell of water, it is advisable to place it an open glass jar below a tap, let it stand for half an hour to allow the chlorine to evaporate and then put it in the fridge. The actual cooling of the water mitigates the taste and smell of chlorine.

If you also add a drop of lemon the flavour will be enhanced.

If water is natural, why does tap water smell?
Natural water may contain substances that generate odour, but pose no health risk whatsoever.

Water is an essential element for life and an essential nutrient in our daily diet. The human body is comprised primarily of water, which plays vital functions, which why it is essential for proper hydration when ingested adequately.

Is 1.5 litres of water a day enough?
It is difficult to establish the exact amount of water a person should drink daily, as needs often vary depending on different factors, such as physical activity, climate, age and sex, among others.

The recommended quantity of water for healthy adults to drink is 1 ml per kilocalorie per day, i.e. between 2 and 3 litres of water daily.

Of this, between 75 and 80% must be obtained from drinks (mainly water, milk, juices, teas, soups, etc.), while 20 or 25% should come from solid foods, such as fruit and vegetables.

Do you know how you should start and end the day?
While we sleep, we lose water. It is therefore advisable to drink at least one glass of water before going to bed and another when getting up.

Why do we need to be well hydrated?
When you sweat, your body loses water and minerals. 99% of our sweat is just water, but we can also find minerals such as sodium, potassium, magnesium and iron.

Good hydration allows the body to recuperate the water it needs and prevents certain disorders, such as vomiting, headaches, tiredness, dry skin, etc.., which are typical symptoms of dehydration.

Do you know why we shouldn’t have to wait until we’re thirsty to drink water?
Water loss suffered by the body every day (more than 2 litres) should be replaced as quickly as possible in order to prevent the dehydration process beginning.

It is therefore very important not to wait to feel thirsty before drinking water, as this is a characteristic symptom of dehydration.

Do you have to drink more water when you exercise?
Drinking half a litre of water two hours before exercising is essential for adequate hydration and to allow time for the body to eliminate the excess of ingested water.

During exercise, hydration is recommended at regular intervals to replace all the water lost through sweating. After exercise, it is vitally important to drink water in order to recover adequately.

Is tap water good for professional athletes?
Yes, tap water is good for professional athletes and anyone doing sport.

Can children drink tap water?
Tap water is safe for adults and children. It is important that children get stops on workouts or games to drink enough water and hydrate. In the case of children under one year of age, a lower tolerance to the minerals in tap water is to be expected.

Do the elderly need to be more hydrated?
For the elderly, it is essential to control water consumption, given that with age there are changes in renal function and a significant decrease in the sensation of thirst.

Did you know that you should drink more water if you have the flu or diarrhea?
The common cold, flu and diarrhea often lead to dehydration, so in these states it is necessary to drink water regularly.

Whether it rains or not, we must always look after this scarce natural resource, as a requirement to have water in the future.

Why is it better to shower to have a bath?
It is better to shower because every minute spent in the shower with the water running uses up to 10 litres of water.

Which plants require less water?
Plants that require less water are shrubs, native plants and resistant. These plants are just as beautiful and requiere less water.

What is the best time to water the garden?
First thing in the morning or late afternoon as we make better use of the water because it does not evaporate as quickly.

After cooking, where can I throw the oil away?
We recommend removing the oil from the pan with a paper towel and throwing it away. Do not throw it down the sink because oil and water do not mix and it is very difficult to remove it in wastewater treatment plants.

Why is it recommended to not pour paint down the sink?
It is not recommended because paint is a strong contaminant. We advise you to let it dry into a solid mass and to take it to the municipal collection centres.

And butts, can we throw them down the toilet?
Do not throw cigarette butts down the toilet because they contain nicotine and tar substances which dissolve easily in water and which are contaminants, even in small concentrations and are very difficult to remove in the purification process. Throw the remains of the cigarettes away once they have been put out.

What other materials should not be flushed down the toilet?
Plastics, gauze, pads and condoms should not be flushed down the toilet, because they can clog pipes and negatively affect the passage of wastewater in sewage treatment plants. We advise you to put a small container in the bathroom to throw these solid wastes away.