THE WATER IN OEIRAS · DISTRICT OF LISBOA

Tap water in Oeiras.

Ayus installs and maintains 4-stage water filters at home, hidden under the kitchen sink. This page sets out what is known about the mains water in Oeiras: where it comes from, who treats it and what it contains.

MUNICIPALITY · DISTRICT OF LISBOA

Oeiras

WATER UTILITYSIMAS de Oeiras e Amadora

WHERE THE WATER COMES FROMMainly the EPAL system

7,8pH

0,39Residual chlorine · mg/L

In the water supplied to Oeiras and Amadora, the pH was 7.8 and residual chlorine was 0.39 mg/L in the first quarter of 2024.

We have asked SIMAS for the magnesium and calcium values by zone. During the visit, we measure them in your kitchen.

Sources: SMAS Sintra, results for the first quarter of 2024. The values are the ones the water utility publishes; during the visit, we test the water in your kitchen.

WHAT THE FILTER DOES TO THE WATER IN OEIRAS

Removes the taste and smell of chlorine.
Holds back the sand and rust that building pipes add.
Holds back microplastics: the membrane pores measure [X] µm, and a microplastic is at least 1 µm.
Keeps the minerals and adds magnesium.
Does not remove limescale.

See how the filter works →

Questions about the water in Oeiras

Where does the tap water in Oeiras come from?

In the water supplied to Oeiras and Amadora, the pH was 7.8 and residual chlorine was 0.39 mg/L in the first quarter of 2024.

Who manages the water in Oeiras?

The water utility is SIMAS de Oeiras e Amadora. It treats the water, distributes it and publishes the quality control results.

What values does the water in Oeiras have?

pH: 7,8; Residual chlorine (mg/L): 0,39. Source: SMAS Sintra, results for the first quarter of 2024. During the visit, we test the water in your kitchen.

Does the Ayus filter make a difference in Oeiras?

We have asked SIMAS for the magnesium and calcium values by zone. During the visit, we measure them in your kitchen.

Does Ayus install filters in Oeiras?

We install in Lisbon, available right away, and other districts by appointment. Leave us your details and we will arrange a date.